newbie: 29 lb-in = 464 oz-in? this site offers comparable ones in nema34 -- up to 1813oz-in = 113 ft-in http://www.kelinginc.net/SMotorstock.html
yeah but those are peak torque
newbie is now known as dareposte
oh, oops -- you said servos
and I ignored you
no problem, thanks for the responsee
i guess i will have to call up a baldor rep, but they always try to screw me on pricing
I need something like this: http://www.baldor.com/products/servomotors/dc_servomotor/dc_servo_spec.asp?CatalogNumber=MT-4070-BLYCE
or at least think I need it
Hey, if I wanted to make a small 12" engraving machine, what do you think would be be a good spindle to use?
like a dentists drill without the 90 degree angle in it
I think I found my motor source: http://www.clickautomation.com/products/index.php?func=show&pid=2033&cid=300
[00:20:31] <jepler> http://quicksilvercontrols.com/store/catalog/QCI-A34H-1-Servo-Motor-w-Encoder-43.html
(just from google, not personal experience)
Like a dremel, but better quality
not bad, but 16000 cpr lol
can a mesa keep up with that?
JymmmEMC: it's hard to beat a turbine based engraver, but electric they make electric die grinders you might look into
dareposte: the bit I'm confused by is "Index Pulse: 49 - SilverLode Controller/Drivers internally translate to a single index pulse."
surely they don't mean there are 49 "index" pulses per revolution?
I hope not
sewing machien motor??? http://www.data-cut.com/page5es.html
dareposte: yes, 16000cpr@2000rpm is 533kHz and no problem on mesa with differential encoder inputs
[00:24:57] <dareposte> http://www.performancetoolcenter.com/ge0600.html
jepler: not bad, your pricing is better and it comes with an encoder
it looks a bit small for the stated torque though
I have no sense of that
the servos i've seen that are that range tend to look quite a bit larger in length, and the frame has been a 34 or 43 sized frame
bookmarked it though, it may be a good thing to come back to
JymmmEMC: that looks like a hermes head. - sewing machine motor
[00:29:00] <JymmmEMC> http://www.visionengravers.com/products/Vision-router-engraving-accessories.html#A5
what I'm surprised by is putting 16A through pins on an HD15 connector -- unless I'm mistaken, that's the connector style of VGA monitors -- not on that specific motor, but it's an option shown in the datasheet
ah I guess that's only an option on the smallest motor in that range, 3.7A
er, hm -- the power pins are called A-, A+, B-, B+. That's not a servo
at least not a simple dc servo
aha: "Our servo controllers convert traditional microstep motors into servo motors also known as closed loop stepper motors. What the industry commonly refers to as a “stepper motor” is, more accurately, a 2 phase, 100 pole, AC brushless motor"
jdhNC: yes, high resolution encoders + steppers + expensive pixie dust controller boxes
16000cpr as dareposte noted above
"traditional microstep motors" odd term
heh, scrolled by, this window is only 5 lines
and... Hi everyone
I prefer this little thing over dremel , its easy to clamp in the tool post too
[00:48:54] <skinnypup> http://www.air-supply.com.au/shop/product.php?productid=17099
just the first one i found online
skinnypup: I've seen similar at a local imported-from-china shop
never bought/used it though
yeah just scrolled down and saw the $$$$$ lol
think i gave 35 or 40 bucks though
[00:53:59] <jdhNC> http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=47869
I don't think the au$ is quite that weak
I'm not very happy with dremels since I fried one on its first use
jdhNC: yeah that's the one
dremel might be ok if they bothered to ballance the darn things... i can't stand to use one
balancing would take $$$
it was worse than the balance at one time, they got rid of a bearing and replaced it with a rubber sleeve
Must figure you won't wear it out if ya gotta put it down due to the numb hand
I think they went back though
I'd still like to have a foredom
I think I've ruined/destroyed pretty much everything that I've tried to use a dremel on.
i have a BIG smaller macine going in
foredom now sells a belt sander attachment, that's intriguing
for me anyway
dmess, what is it, some kind of machining center?
i need a CAT50 jig grinding attatchment
one of the guys at work left his ebay account logged in, so I put a pink frilly tutu on his watch list
yes.... smallish boring mill with a 200mm quill
smallish boring mill meaning it isn't quite big enough for a 747 landing gear?
no.. but i would eat the torque links ;)
why does everybody always get excited about the boring mills??
they are largish
1.5m x 1m x1m x 700mm of 200mmdia quill
that doesn't sound boring at all
and we can go over to SWP's house and use his new lathe any time we want
only if you don't want to work on boring stuff
look up the Toshiba btd 200 qh
[01:13:46] <dareposte> http://www.toshibamachine.ca/images/equipment/BTD-200QH/BTD-200QH.jpg
i'm looking at a boring head on the quill/ram
anything you need steps to change the tool on would take too much 'splainin' to the wife
dareposte: that's more of a horizontal mill, unless it has a quill
has a 60 t/c on it
dmess: you must have a serious shop
to be fitting that thing in there
it has a 200mm dia quill that reaches 700mm out.... ;)
* dareposte converts to inches
dont splain to the wife leave her
8" x 16"
she's GOT BALLS
sounds like a hormone problem
or a drinking problem
10" f/c is chicken poop .. ohh well were done.. just co-habitating... btfa
machine is in VAN CANada waitin me to send it a home
dareposte: there's a suprising number of large machine tool shops
one of the places near me aparently has a 500" x 120" floor mount boring mill
i know those are needed for industry
OR ARE THEY
i didn't figure there would be a lot of huge shops using EMC though, figured it wouldn't be cost effective for that type of work
oh, there aren't
tell them to look for wor off shore
so dmess apparently has both a large shop, and some interest in emc
the inserts that go in one facemill on those machines can cost $5000 easily
spending 10-20k on a control is not an issue when the hardware is 1.5-2.0 million
yeah that's kind of what i was thinking
now my $1000 bridgeport clone made in taiwan, seems to be an excellent candidate for emc
dmess: what control did your new machine come with, out of curiosity
i work for Messier-Dowty.... and i have a hardinge i need to pour to EMC
are laptops really not suitable for EMC? Nothing that can be configured to make them acceptable?
depends on the laptop, but that's usually the case
I have an old compaq p4 that has no current purpose
unfortunately, we can't tell you whether it will work or not, or what you ahve to do to make it work
there are some guidelines on the wiki
can you tell me what to look for to tell that it isn't?
you need to disable anything having to do with power management, ACPIP, system management, etc.
basically if it's automatic, turn it off in teh BIOS :)
its a glorified fanuc 16
i'd like a control that says creepy things
"What are you doing, Dave?"
it doesn't seem to have many bios options
yeah, I think that's common with laptops too
I want one that asks me "are you sure?" like four times before it does anything
no problem with that one and the right application guy
jdhNC, try these: http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?FixingSMIIssues
dmess: so your interest in emc is for personal use, not business?
dare.... that really pisses a good machinist off
guess that tells you something about my abilities then :)
i have one control at work that's currently confusing the crap out of me
it's a fanuc 0T, but it's doing weird things when I command a U/W move in MDI
if I jog any part of the machine, the next relative move it makes will be in some totally random, not commanded direction
that sounds inconvenient
most certenly.. ive been in SOME sort of EMC channel since i was born into LINUX live
I'll tell it "G0 U5.0"
and it'll go to like U-2.0 W-10.0
pardon my ignorance, but which axis is U
on a dedicated lathe control, U is incremental on the X axis
and W is Z incremental?
there is no g90/g91 on lathes.
in EMC those are extra axes, even on a lathe
i know, i'm talking about every other control ever made
I understand :-)
is this a faCING HEAd???
so the w controls the x
nar, this is lathe work
not mill work
i'm telling the lathe to make an incremental move in X up 2 inches, and it goes off in some crazy direction
often right into the part
w controls z
and none of the other lathes do this
maybe there's a "do crazy things at unexpected times" parameter
but none of our other 0t's do this
with W over z
(21:35:01) toastydeath: w controls z
w is supposed to control z on a lathe
what is not normal is the control taking off in any random direction it feels like
it must be a PLC axis whitch they did use back then
no, it's standard
X/Z are absolute, U/W are incremental
no need to switch between g91/g90
i understand... ran manny a lathe... its all about the IJK 's
toasty: so do you have one hand on the e-stop every time you do an mdi?
i never move that lathe in mdi because of that
makes it useless, it won't go where i want it to anyway
but i guess if you are asking in general, no
i keep the rapid down and the feed at 0 until i see where it's going to go pop up on the program check panel
unless it's something dumb, like homing it, then i just let it go.
i really hate having to hit estop, even in a crash
hitting reset usually works
then you have to re-home everything and the machine might get stuck
blah blah blah
some machines home funny or move funny until they're homed.
and if you have a drill snapped off at an odd angle..
easier to recover if you haven't hit estop
i think i'm going to have to give up on giant machine tools, they all weigh too much
EDM's seem to be less hefty
although the funniest moment regarding estop was when a co-worker was demonstrating something to me and he said, "okay, time to run this"
and mistook the big red estop button for the glowing green "cycle start" button
later on that same day he turned the cnc off entirely after mistaking the "cnc off" switch for the "coolant off" switch
right in the middle of a cut
also ram or wire edm
they're expensive to run, so i hear
you're looking at wire edms?
i would suggest hitting up practicalmachinist and asking how much the consumables cost
no i was just looking at turning centers
but they all weigh too much
then i saw a 12x15 edm that only weighed 700 lbs
it was a sinker type
edms are slow and expensive to run, man
hard to justify
maybe one of these instead: http://www.hgrindustrialsurplus.com/sub/product_detail.aspx?id=90-237-018
uh, what are you going to do with a high speed press other than take your fingers off accidentally
the weight is an issue too
still 10,000 lbs, it seems to be the magic number
one of my friends is looking for a way to automate his armor plating business
then an obi is not what he is looking for
its basically 18 gauge little stainless plates formed and with an attachment on the back side
well then maybe that is exactly what he's looking for.
some reenactment or something
apparently its a decent business selling it though
although that is probably overkill
he could do a whole year of volume in a couple days on that thing
and for the low, low price of 150,000 dollars, you too can have a die to make your parts
nah you can make dies pretty cheap
for what he does
just not the fancy progressive ones
i have a co-worker who used to work on fancy diesets
he showed me this one part, it was a thin little star washer
maybe 3/8ths in diameter
with a little sunburst pattern in the center
million dollar die back in the 1960's
i almost peed myself
they must be class 3 dies then
the serious everything is perfect and will run forever type
yeah, that fits the description
of what he described
that's what all the dies at work are too, for automotive stamping
but you can make or buy class 1 dies for way way cheaper
just give a file and a block of metal to a homeless guy
and tell him to get crackin'
something like that
if you have a piece of O1 or D2 tool steel and a manual mill, you can make an effective blanking die
cnc makes it much easier
in fact you don't even strictly need to machine it, you can get pre-hardened steel strips and just arrange them tinker-toy style on a cast iron base and get good results
for about 10k units
then it all goes to crap
but if all you need is 10k units, then great
or if the volume works out such that you can just replace the die every 10k and still be profitable
right now this guy just uses a manual hydraulic press with a class 1 die and it's working fine for him, but takes a long time
he actually cast the die bottom out of some non-ferrous metal
the forming die
pretty cool if you ask me
i don't remember what it was called, but it was some special blend of zinc and aluminum
which doesn't sound very strong at all, but apparently is
way ot though
$500 fork lift anybody? http://www.hgrindustrialsurplus.com/sub/product_detail.aspx?id=21-203-001&searchtable=1&sortExpression=&SortASC=&pageSize=50¤tPageIndex=4&searchNAP=true
its probably really a good thing that I don't live anywhere near HGR
yeah, except that when I go there it makes it a lot more expensive
I wonder how bad a sandblasting cabinet can get
last thing I need is more projects
their prices aren't really that great on those
toastydeath: I'm thinking about offloading some collets, is there a point to keeping more than 2 or 3 of any given size?
the paint on the forklift is _way_ too new
it seems to be on everything too
yeah, forks and all
maybe not, just hiding ugly
who paints forks? first lift will scrape it off
they come painted
I've never seen a forklift with yellow forks before
at work our pallet lifters still have paint
pallet jacks, sure
silly discussion anyway, I'm not in the market for a forklift
I'd have to consider an offroad forklift
Jeep forklifts ;-)
they are backwards tractors
I figured that a boom forklift would work offroad, but then I saw jon elson's web site
but I rented one anyway because I'm lazy and it's a pain to put something in my basement with a regular forklift
[03:12:25] <eric_unterhause1> http://pico-systems.com/sheldon.html
I think he should name that page "that sinking feeling"
Patrice: now you are on irc :)
Patrice is a friend of mine who is new to IRC. He has an emc2 controlled machine that does work to eyeglass lenses
Okay, it is pretty straightforward, do not know what happened before
Thank you Dan
that video of the machine that you sent me, would it be possible to show it to others?
Patrice is using probing to check coordinates of the eyeglasses and then he does milling to the edges
Patrice: so you want to send info to emc without operators having to enter anything in the control, right?
ok, this was the question about doing an automatic circular probe on the list (saadp.fr or something)
Some named parameters need to be updated at the beginning of the g-code
the rest is automated
Patrice gave me a tour of his factory- it's an amazing place. Prescriptions come in and are bar coded
the frames and lenses move along on conveyor belts from machine to machine. I
it is really interesting to watch
heh. I was recently trying to convince my mother to use an internet eyeglass provider :)
so, Patrice showed me a row of machines that use old DOS controls- I think he wants to replace them all with emc
if he can get more automation going
as in making the scanning more automated
sure. that will probably require some customized hardware (mechanics)
I think I convinced him to take apart one of the tracers to see how it worked :)
2.3 has new probing codes that are fairly flexible - maybe you could build up what you want based on those
I imagine a pizza-cutter style thing - you drag it around the edge and record (using halsampler or something) the deflection
I think the jdi.py script might be enlightening for him also
so do you sample the frames directly and then cut the lens to match?
unless probing will work - except that only uses straight moves
SWPadnos: yes that's it
we trace lenses or frames
to what resolution?
so it always makes a pseudocircular path I imagine
Yes, I should say patterns
more of a round rect sometimes, I imagine
do you have analog feedback from the probe?
cradek: it looked like a spring loaded stylis
but , I might be wrong on how it applied pressure
a spring makes sense if you have analog/encoder deflection feedback
can you trace and cut simultaneously? seems like maybe you could just make the machine follow.
This is what we do, trace, save, then cut
think of the probe as a very precise joystick that drives the cutter around
no, I mean skip the digitize step
It is using polar coordinates
I want EMC2 to run my place :)
me too :)
cradek: so, what I saw was the frames come in a little plastic tote with a doctor's prescription
the paper with the prescription had the prescription barcoded on it
an operator placed the frame that was in the tote in the little tracer machine
that somehow attached geometry to the job
then the tote moved down the conveyor line to the grinding and edge cutting steps (from what I remember...)
ok, so you have to digitize, because the tasks are separate
Yes, the output file has a bunch of couples (angle, radius)
I assume you have to offset the path too, for cutter compensation
is there a difference in the grinding step depending onthe final shape/size of the lens (or frame)?
er no, you'd just have to shape the probe like the cutter
I think that SWPadnos should come out and visit his brother in Beaverton and stop by and see Patrice
cradek, use the right size wheel
heh, sounds like a good idea :)
then I can decuct the trip
yeah, it's obvious after 5 seconds of thought :-)
err, I mean then it's all business
where are you Patrice?
Portland, looks like
he has newborn twins in the back round too
in portland, or
the kids are keeping you busy :)
wow, I thought all the optics manufacturing went overseas
we are overseas from France
it's a French based company
on average, how fast is a high steprate?
on average, how long is a stick?
you could look up the max step rate input of a driver you're interested in
depends on optos and other fiddly stuff - they are all different
a PC can, for the most part, generate 25-35 kHz easily
ok, what's the fastest steprate you've seen?
from the control, input limit on a drive, what?
from a motor ...
softare generated? hardware generated?
SWPadnos: noooo -- my dual core fancy schmancy can only get to 12kHz
ok now we're getting to the real question
then you need to reconfigure it
multiple MHz hardware generated
well, obviously hardware is far more capable at step generation
around 60 kHz software generated, I think
[03:49:15] <cradek> http://pico-systems.com/univstep.html
12.5 kHz is terrible, just so you know
this does 300kHz
if you're not using doublestep, you should be
12.5 kHz is a 40 uS base period, non-doublestep
if you have a computer that can't handle better than 40 uS, then you should get a better PC (for this purpose)
or get hardware
unless 12.5 is good enough for your application
well, technically, I start seeing realtime delay notices @ <40us
my assumption is that it isn't, or we wouldn't be getting this question
SWPadnos: you know what they say about assuming
yeah, very well :)
argh it makes no sense
looks like the actual question is how to fix the realtime delay notice at <40
what video card and driver?
video card is some random ati rage pro
for the video card
also have you checked bios for power management stuff you can turn off?
acpi -- disabled ; usb controller -- disbaled
note on the cpu: it's one of the early pentium d models. supposed to be dual core, but I can only see one core unless I enable hyperthreading
in which case I see only two cpus. and I have isolcpus=0
hyperthreading is bad, turn it off
can't , see above. in fact, it's even slower when I turn it off.
what SMP+RTAI kernel are you using?
(more assumptions here, that you're using SMP, or you wouldn't ever see multiple CPUs)
kernel 18.104.22.168/rtai 3.6-cv
which you built yourself?
and if I remember correctly, you're on Debian rather than Ubuntu
is this the point where you tell me to buzz off?
no, I'd suggest installing our kernel to see if it behaves better
if it does, *then* I'd tell you to buzz off :)
you could just boot the cd and do the test
yes, that would be the easiest thing to do, wouldn't it :)
it'll show one CPU and not do HT
well, HT should be disabled in the BIOS
so try the emc live cd?
and what about the HT thing -- isn't it weird that I can't see the second cpu without HT?
yeah, just run it live and see if it's better - if so you know you can probably improve it with kernel and/or rtai settings
not really - many of those were HT only, not really two entire cores
maddash, maybe, maybe not. the CPU is probably single-core + HT, which is dual-core in marketing-speak
that's just lame.
but isn't HT simply the capability to truly execute 2 threads simuultaneously?
I think the Ds had a tiny tiny cache too
wouldn't that speed things up?
speed up != better latency
you've got conflicting goals unfortunately
but I get much better numbers on the /usr/realtime/testsuite/kern/latency test
with HT rather than without
gives some crazy segfault when set to 1
if you only have 1 CPU, then 1 is invalid
though it shouldn't segfault
hm, you're right
riiiight. I remember better now -- I switched away from isolcpus=1 *before* I re-enabled HT.
hmmm. I wonder if it's any better to use CPU0 rather than CPU<N> for RTAI
since it needs fast response to interrupts
(which are normally vectored to the first CPU, though that can be changed)
i'll have access to the machine again on friday -- then I'll post some numbers for you guys
cool. feel free to debunk my statement that HT is bad - that's all I've heard about it
didn't jepler or someone say that if you have a dual box that putting "some" load on the other cpu increased perforamnce
that was me
and it's only been confirmed on core2 CPUs
I don't think the Atom exhibited that, and no AMD chip I know of has either
Well, I aint pulling out the HT box to test, it's WAY TOO LOUD
shhhh it's bedtime
oh. so it is. night all
Has there been any talk about adding USB to EMC by chance?
sorry JymmmEMC, we all live in our parent's basements and haven't heard of usb yet :)
Well, I'd still prefer ethernet, but can't get SWPadnos to even consider it
I also prefer ethernet
USB is a dead end
(nyah - I haven't gone to bed yet)
SWPadnos: Wouldn't offloaded ethernet to I/O module do better than trying to do everything on a low latency mobo?
conceptually, offloading all very high speed I/O is better than having the PC CPU respinsible for it
SWPadnos: should a off the shelf gigabit switch be able to deal with it?
the less tightly coupled the I/O becomes from the trajectory planner, the more things stop working, or the more features you have to stop using
I know we talked about a hub, but tare
couldn't a calibration cycle be performed?
switches introduce effectively random lags, but there are a lot that can do wire-speed switching
dunno how the lags would compare
right, which I was suggesting a calibration cycle to determine that
you can't calibrate random
it's random dependent on other switch traffic, not "a different constant for each switch"
if it can be done on a paraport, why not ethernet swtich?
it's not impossible, especially when you're talking about sending data at the servo rate, not a really fast step interrupt rate
is that an fpga on the pico universal stepper?
there's a serial EEPROM onthe board - the FPGA isn't "easily reprogrammable"
which is good, if you want the thing to be active as soon as it's powered on, but bad if you want to change the config
ok, bedtime now. night
fenn_ is now known as fenn
btw, is anyone else playing with spindle sync'd motion, for stuff like rigid tapping? My mill works fine if I tap say a M3 thread but if I go to something like M6, at the start of the tapping cycle, I can hear the Z axis motor speed PLL'ing to get to the right Z speed for the spindle speed, is that right / normal?
what do you mean by PLL'ing?
um similar to how a phase locked loop locks up on an oscillator, dunno how to describe it in mechanical terms
but i can hear the Z motor speed ramp up/down in shorter and shorter cycles until the speed is smooth
if that makes sense
i checked the quadrature input right thru to the parport input pins, and its a clean square wave
this is from the 360ppr spindle encoder
pjm_: a halscope trace on the Z velocity would help
ah good idea
ok i'll do that, Z velocity and perhaps spindle velocity on the same graph
once the Z and spindle are in sync then it seems to work perfectly, its just the starting up bit that might be a problem
but i will do that, thanks for the pointer ;-)
starting from that, it might be interesting to look at other thingies too
like encoder position, index, etc
sure, i can do that. I've noticed a shortcoming with my parport for the spindle speed measurement, it seems i cant reliably clock more than about 6KHz into the ports, I really need to get one of the 7i43 cards
archivist , when is the next UK 'engineering' sort of show / exhibition etc?
that is a tranistion about every 25us
wow 51KHz! amazing
presumably not with a parport?
thru the parallel port - 1ghz pent III
and that was mouse guts
pjm_: 6kHz seems awfully slow
yeah that is what I'm thinking...
i ran the latency test over night and it was stable at 15716
that was with glxgears, and www pointing at an auto refreshing mrtg page
i must have some error in my config, the max sample speed in halscope is 16.1KHz
ahh i'm wondering if I tweaked the base period since i moved EMC to this faster box! that could be it perhaps. Old was 633MHz P3, new is 2.4GHz P4
Just this once .. here's the log: http://www.linuxcnc.org/irc/irc.freenode.net:6667/emc/2009-03-25.txt
i've fixed the problem! thanks for the pointers. I'd copied over the old config from the slow PC to the new one
I've updated the base_period and can now sample at 34KHz or so
how many rpm is that?
hehh i didnt crank it up fully, let me have a quick go
although I'm not sure my base period is optimised becase initially I set it to 20000 but EMC reported a RTAI error on start up
holy crap: http://www.fanucrobotics.com/file-repository/DataSheets/Robots/M-2000iA-Series.pdf
that's not a small robot
look at the "repeatability" spec
Optic: 1200kg payload
~ 2600 lbs
skunkworks its working nicely with a 10KHz input now, i.e. about 1550rpm or so
so it could mill things by moving a Bridgeport around :)
alex: 0.3mm repeatability
pjm_, isn't that encoder 360 CPR = 1440 PPR (in quadrature)?
it is yeah
ok, so that's pretty fast actually, you need 37200 Hz sampling at absolute minimum
(at 1550 RPM)
so i tried setting my base period to 20000 given that the max latency was about 16000, would you say that is too near the knuckle?
but at 20000 it errored wiht the RTAI stuff
yeah, that's a bit close
ok i have BASE_PERIOD = 27500 at the moment
and it seems ok
but yeah i probably need to think about moving to a 7i43 card for the spindle encoder
might as well do all stepping/PWM/encoder I/O on it, and get rid of the base period entirely
yeah thats probably a good idea, i can get rid of some of my parports then
get a 5i20, it has 72 I/Os ;)
there is 5 ports currently, so i could drop a couple of them
and doesn't take up a parallel port, so you could still use one of those
whee.. can you take some pics?
pjm_: sounds fun
wow. a 5i20 should be less expensive than 4 plug-in ports :)
they were all ebay c**p
SWPadnos: not if they're doubles
20$ for 2 ports
yeah 2 of them are dual port cards
so 40$ for 4 ports + the mobo one free :D
close enough :)
hmm. looks like I need to restart Mozilla. it decided to stop getting emails automatically
ok so a question on base period, of course i've used the latency test tool, but is there a precise way to set up the base period so I can get it as fast as possible?
i've set all the PCI latency stuff in the bios down to minimum to try to reduce everything where possible
ah yes dmesg, of course, sorry for the silly questions, I obviously have brain fade today
i've had my head in reports for work since monday
we made some nice cuts out of acrylic last night
pjm_: I pasted that page for possible causes which might cause high latency
but usually it really depends on your luck with the PC
some PIII's a re very good with latency
I had good experience with some older Athlon's
some recent Core2Duo's can be very good, but they can also be very bad
we cut some 1/4" and 1/8" material with good success
alex_joni would you be able to cast your eye over http://pjm.dyndns.org/dmesg.txt
and offer some words of wisdom?
its only the last few lines from the current session, not the whole thing!
what is the unit for "feed rate"?
units per minute i think
ok, i was thinking units per second
units per minute, units per revolution, or inverse time
but that would be totally wrong :)
are the three modes
most machines start up in units/minute
pjm_: not much I can understand from that..
ok, thanks for looking tho. I found an S3 video card that I'll try in the box first, see if that makes any improvements
alex_joni: hey biotch
alex_joni: What would you suggest to have/use as a kiosk system with tools that need to access/use system utilities?
define system utilities
alex_joni: as basic as dd, fdisk, mkfs, etc
but mostyl dd
maybe html for documentaton, but not only web
the kiosk system I've seen usually had only a touchscreen as the interface
and you could open a virtual keyboard for typing
Well, the cost of a laptop these days is < $500, the cost of a overlayed touchscreen is $200. I was considering using a rotary encoder for the IO
a regular PC is 200
with a laptop, I can just remount/relocate the LCD itself
too much work
Rotary encoder http://www.griffintechnology.com/products/powermate/
Not really, if this works, could do production.
a standard 15" LCD still isn't as cheap as some laptops that I've seen for $300
The only difficult part I see is the cable between the main board and the LCD itself, as they are usually flex PCB that would need to be extended in length.
alex_joni: But nothing a razor blade and soldering iron couldn't fix =)
17" lcd's are $90-115
razor blade and soldering iron on flex cable. good luck :)
SWPadnos: Tehen, what would you suggest?
get an industrial monitor and mount it the way it's supposed to be mounted
off-the-shelf 15" touchscreens can be had for <$400, 17's aren't much more
I can get a whole laptop for $299
if this kiosk is intended to be touched by "the public", then you will be replacing laptop screens every week or two
unless of course you are offering your credit card number
cheap is often very expensive
SWPadnos: Nothing 3/8" plexiglass can't resolve
as long as you don't need touch, sure
I can't afford it
thus the rotary encoder for IO
Think the old arcade games where you entered in your initials
simple iface that anyone can intitively use
oh, sure. you're using the Tempest interface :)
toastatw1rk is now known as toastatwork
alex_joni: are you still using chrome?
switched to beta
skunkworks_: no real issues with it
just saw a reference to it today and wondered how you liked it.
it was released a while ago (the stable 1.0.x version), which I ran for ~ half a year
it has some annoyances (features missing), that's why I switched to the new beta
in paralel there's chromium which is the OSS version of chrome (not that you can't get the source for chrome), which has an unstable tree - a bit too shaky for me
[15:50:25] <skunkworks_> http://groups.yahoo.com/group/DIY-CNC/message/27351
does mach really run at ring 0?
huh. can't seem to access that without signing up
aww - sorry.
SWPadnos: that's true for any yahoo group
some are open though
I have a Yahoo account, I'm just not signed up for that list
I don't know why a group wouldn't make messages available though, that is an option
anyways.. it's not a topic I want to read without screaming FUD every second other email
eric_unterhause1, yes, there's a kernel driver they use
eric_unterhause1: to cause more people to sign up
eric_unterhause1: and then show off how many subscribers they have
"Mach3 doesn't attempt such tight control of the hardware. Servo loops
are not done within Mach since
Windows is simply not that responsive."
so you can easily do step pulse generating, but doing closed loop is hard
i got 6 words, "closed loop control" "feed rate override"
the whole break a bit - jog away - fix bit and start again is a big hangup for people.
or a couple of people it seems
John S. must be John Stevenson?
duh, says so on the right of the interface
dunno, but he's full of sh*t
[16:03:35] <cradek> http://sourceforge.net/tracker/index.php?func=detail&aid=1377336&group_id=6744&atid=106744
before 2005 we had the same FO>100% bug
wow - you have fixed a lot of bugs - nice work!
Mach certainly has gotten a lot of people started in cnc that otherwise wouldn't have done anything
I think the screen designer argument is a red herring
people don't want to have to make linux work
but they don't have to.. that is the problem
didn't say that was a real problem, just fud
fud works, ask IBM
Ppl use what's familure to them.
people don't understand that Linux (with GUI) and Windows are almost the same, and they're scared of "that thing they don't know"
nix has a huge learning curve all on it's own.
at the same time, they don't realize that they know very little (on average) about Windows also, but at least they're used to it
no, it doesn't
mach has the same latency problem as emc, they just don't admit it to you
SWPadnos: Yes, it does.
you can *use* it just as easily as you can *use* Windows
there is a learning curve for *administration* though
which most people don't know how to do on Windows either
I had a really nasty problem on windows, found out the solution on a linux forum
SWPadnos: To an end-user it's all the same.
I disagree :)
unless you're saying that for an end user, Linux and Windows are about the same :)
SWPadnos: Ok, add a printer to nix compared to M$
local or remote?
actually, I did recently
it's easier on linux most of the time now
doens't matter. same goes with a usb device
I had to hack my wife's computer for a while to get it to work
I installed ubuntu and passed it on to a nephew of mine (aged 8)
he had no issues in using the computer
ask my wife how easy it is to get a printer working on windows, she was trying to talk her mother through it on the phone and was close to crying/screaming
eric_unterhause1: actually it's pretty simple (at least for me)
navigate to the samba computer, in view network computers
double click the printer, and it's installed
that assumes samba and cups are properly set up, and fed with the proper drivers
I think you are agreeing with me?
my wife's computer was windows xp, required some hacking and restarting
JymmmEMC, on Linux, it's either trivial or very hard to install hardware
I mean the win part to install a printer is pretty easy (if the printer is installed on a linux box/server)
printer is on a windows pc
on Windows, it's can run the range from easy to hard
but it's almost never trivial
there was some problem with workgroups that ubuntu had no problem with, bill gates couldn't handle it
Consider a brand new AIO printer attached to a nix box.
even for a mouse, I recently had problems that I couldn't resolve on Windows (though I should see if it works now that I rebooted)
on Linux, I haven't had a problem with a single USB input device in the last year or two
even my wireless was plug and play on my new ubuntu box
on Windows, I might get basic 2-axis/3 buttons/scroll wheel functionality, I might not
and extra buttons just don't work at all until I install drivers
they're making linux easier nowadays,not too long ago, that wasn't true
same mouse plugged into any recent Ubuntu machine works perfectly every time
I agree, there have been great strides in usability in the last few years
still i have "NO" how to install a program if it doesn't use apt or synaptic
sure, but still not there. even wifi is still an issue much of the time
hasn't been for me, except with one brand of USB->wifi adapter in Germany
piasdom: sure - but would you be able to install a program on windows if it didn't have an installer?
i prefer win(don't throw anything) because it has a follow-the-pic(icon) format..in linux, you really need to know what you're doing
try installing a driver without an installer, it can be an all day affair
skunkworks name a program that doesn't have an installer ?
on M$ that is
other than unzipping and running
well, there are a few you can just download and run, like putty :)
visual studio has a nice packager nowadays
this misses the point though
anything that is source code only...
how do you figure out what programs a .deb has installed?
which is that for day to day tasks, especially on a machine that will be more or less dedicated as a CNC controller, neither OS is much better or worse than the other
eric_unterhause1, you can go to Synaptic and click on the "Installed files" list in Package Properties
keeping a windows machine from getting crufted up and slowed down is nearly impossible
eric_unterhause1: dpkg -L foo
or you use mc, and hit enter on the deb
it's basicly a tar.gz archive
aiiiiiieeee, no mc :)
on Ubuntu, if you try to run a program which is part of a package, you will be notified of the package to install (in a terminal anyway)
eric_unterhause1: why not?
alex_joni, will mc show you the permissions of the files?
SWPadnos: I think so
let me check
That is the otherthing.. Unless you do it often - when you get infected by a virus - you're most likely stuck until someone can fix it.
synaptic doesn't, so you can't really tell what's executable except by the location (like /usr/bin...)
or re-install the os
yes it does
turns out I'm smart enough to do that myself
SWPadnos: yes it does
I am actually a windows person.. I really only use linux for emc, and somethimes eagle)
I gave up on windows
SWPadnos: you can also see links, and where they point, etc
even that isn't a perfect method, since the post-install scripts could compile/install/chmod things later
you can view those
sure, but it's not an easy way - you have to know what scripts do and stuff
giant fanuc robot: want
SWPadnos: right.. although it's probably not very common that postinst & co will change that
[17:57:17] <skunkworks_> http://groups.yahoo.com/group/DIY-CNC/message/27400
wait - is this true?
did I miss something?
Don't have a Yahoo! ID?
Signing up is easy.
skunkworks_: can't view without logging in .. maybe you could pastebin whatever it is you think is interesting
I just thought the rfl was 'fixed' to make it easier to start in the middle.
I don't think it's true. he's probably talking about imprvements in run from line
oh god, is there another forum to watch now?
[17:59:27] <skunkworks_> http://pastebin.ca/1371882
well that guy can just suck on a log for all I care
and don't forget the Mach forums, where misinformation about EMC can just go unchecked
he doesn't want answers from programmers -- that's fine, because I don't want questions from him
you mean the "geek squad"?
"Nerd Herd" :)
i.e. the people who make the software available to him for free?
i have my cnc system running on a p3 old ATX box, I think it is a 2.8ghz with 2gb memory. do you guys know of a good cpu/motherboard that wold be cheap and a step-up from this ?
I am curious as to just who JS's friend was
cncjerry: I don't think there is such a thing as a P3 above about 1GHz, so you must not know what you have there
who asked for help and was told that he should know what he's doing by us several times
cradek, I think they went to 1.4 GHz or so
SWPadnos: to be fair, that's often the summary of jmkasunich's advice
oh, I missed "Answers from users only, not programmers", hahaha
he's not here, so he's the asshole
SWPadnos: oh, ok
I think - not absolutely sure about that
I got yelled at from jmkasunich... and I came back. (for good or bad)
cncjerry: I think anything around 2.8GHz is so fast that you won't notice any difference by using any newer machine
oh hey - I was right :) http://en.wikipedia.org/wiki/Pentium_III
a nice p4 -2.8ghz usually runs emc quite nice.
we have an atom 1.6 board doing a great job with emc
that is what I was thinking but the problem with the m-board on that system is it only supports two ddr2 slots max 2gb of memory. I haven't tried the denser chips in it
including CPU :)
cncjerry: there is no point to having more than 1GB of RAM on an EMC machine
2GB should be about 4x what you need
model name: AMD Athlon(tm) XP 1800+
I use the machine for CATIA occasionally, not much recently
You'll never need more than 512KB of ram
this is what's running my lathe. It is perfectly fast
it has 768 MB of RAM which is more than it ever uses, like JymmmEMC says
I bought one of thos amd deskside systems with a 1800 I think for $500 fully configured with monitor for my son, that thing screams
cradek: Sorry, I was quoting Bill Gates
haha, I read that as 512MB
I was using my Athlon XP 1600+ with 256M ram until last year
it got an upgrade to 512
bill gates never said that, and anyway it was 640KB , not 512KB
cradek, are you one of the developers? familiar with Axis internals?
cncjerry: yes, but I sense I'm falling in a trap by admitting it :-)
k, so I was messing with Axis yesterday trying to get it to give me higher jog when shifted+cursor. are you familiar with Jog under Axis?
go ahead and ask your real question
or, maybe we should take it to emc-devel if it's going to be intricate
well, I messed with jogspeed within the jog_on function, saved, reloaded and couldn't get any impact. looks straight forward. I have to play with it more, did't have a lot of time yesterday.
this is both easy and hard. the "easy" is that if the ongoing jog is a continuous jog, just send a new jog message with the desired new speed when shift is pressed or released. the hard is making sure that there are no sequences of events that fail to shut off some jogs, keeping in mind that there are 3 jog sources: axis-specific keys, active-axis keys, and active-axis mouse clicks. In 2.4 I'd like to see axis's jog completely rewritten.
wait, you are talking about two different things: one sets the jog speed according to the modifier only when the jog starts [cncjerry] and one changes the speed during the jog as the modifier changes [jepler]
which is what you are trying to implement? which is what we want?
yes, I was at start.
cncjerry: Are you trying to replicat the functionality of TCNC ?
I want to be able to press the shift at jog start and go fast. without shift go slow. add shift during jog wouldn't imact the current jog.
no, replicate the keyboard functions of mach3
in your design, how does this fast/slow interact with the jog speed slider?
press ctrl and jog increment, press shift and go fast.
(and the functions of TCNC, and Ah-Ha ...)
does the slder position change, in your model?
I would have the slider set the max, shift would be at max, without shift it would be a factor of max
yes, by all indications this is not an original idea
ok, now we're talking about three things, the third is a modifier for incremental
nobady said it was a new idea
ok. In TCNC, arrows jog, arrow+SHIFT do fast jog. Even while holding down the arrow keys continously, toggling the SHIT key will flip between normal and fast jog.
yes, that would be ok
'd like a SHIT key
so adding shift would make it go faster
the real plus would be starting with ctrl+arrow for incremental instead of hitting the i. you have to stare at the screen to make sure the I is .001 not 1 or you crash into the chuck a few times
I'm all for more keyboardability. I can't come up with a coherent design though (the complicating factor is wanting to support any jog speed, which is why we have the (logarithmic) slider)
SWPadnos: alias [az]= rm-rf /*
cradek: is that used alot? Changing jog speeds
JymmmEMC: constantly, if you have a fast machine and/or long travel
no, if you can shift to a higher speed, then going slow is normal, shift + arrow is high. I used that a lot with Mach3. the ctrl+ arrow I used even more.
cradek: Would having a normal and fast jog be a viable alternative?
on a small stepper machine, I bet people leave it turned up all the way because they move so slow
cradek: values set in a ini file
i would think having the normal be .5 max and then shift being max
no, I adamantly believe that replacing it with two speeds is unacceptable
I think it should be user settable
keep it simple, max and half max
slider being max
current, and half-current
ctrl+arrow being incremental
personally, I feel uncomfortable with incremental being a modifier -- "accidentally release ctrl, break tool" is easier to do than "accidentally press c, break tool"
likewise, the speed modifier key shouldn't be used to access the slower (safer) jog speed
cncjerry: by default then, you wouldn't get the jog speed shown on the screen when you press the arrow. I think that would be confusing to the user.
accidentally hit i twice without staring at the small font on axis and go from .0005 to .1. Press that a few time and bury the tool in the new softjaws
or "accidentally miss the ctrl modifier inthe first place, brerak tool"
cncjerry: I actually set custom jog speeds. really slow, and quick rapids to get to the other end, and just pulse when I get clsoe
cncjerry: in 2.3, "I" doesn't wrap anymore for this reason
default = obey jog speed slider. shift = max speed
cncjerry: i = smaller increment, I = larger increment
does it wrap?
so i ruined my brand new soft jaws yesterday and broke a cutter with the i wrap.
no. I agree that wrapping was a bad idea
when can I get 2.3?
cncjerry: today there is a beta available
is it easy to install?
where is it?
[18:22:33] <jepler> http://article.gmane.org/gmane.linux.distributions.emc.devel/1967
(that reminds me, I never sent the beta2 announcement)
jepler: yup, that might be nice
maybe even an anouncement at linuxcnc.org ?
well, i am going to continue with my keyboard mods when I get time. having the two jog speeds is great. the incremental with ctrl+arrow allows you to hit ctrl+pagedown for instance at the end of a pass and then go back into continuous for taking successive amounts off a part.
not much different than 'c' then page-down
* alex_joni is nitpicking <- don't mind him
I would like to have a coherent design that has what everyone wants... Then when jepler decides to rewrite jogging he can get it right in one try!
(unfortunately not everyone always agrees with my definition of coherent)
Why not let everyone have what they want?
let them choose/enable which ever they prefer
because then you're committed to writing and maintaining every possible jogging method
(or at least, many of them)
because the different choices will interact in ways the developer does not foresee
Not really, Just give them the option to pick and choose.
for instance, many of the jogging bugs in axis arise only if you use a keyboard jog and a mouse jog at the same time (the "+" and "-" onscreen buttons)
is there a way in axis to enter a position manually?
Optic: that's what MDI is for
oh, you can type in g-code in that other tab, right? :)
G0 X0 Y0
I forgot all about that
can't do that (MDI) while machine isn't homed!
that's ok: bad command or filename
* jepler wonders if he needs to explain alex_joni's sense of humor to Optic
wow, that's an amazing set of release notes.
cradek: did you check to make sure I didn't accidentally double them up or something?
it did seem quite long
on the other hand, it represents a year's work by several people (part time, but still)(
no, it's real
best EMC release ever! (and yes, I say that every time)
* Optic gets it
i'm just having a slow day :)
maybe we should make a "brown paper bag" release, just to make you wrong about it once
SWPadnos: pretty sure we've had a few of those
[18:40:12] <Optic> http://capybara.org/~dfraser/temp/squares.jpg
check out our lasered acrylic squares!
why'd you choose to cut them at different angles? is it testing something?
yeah, non-straight lines, x vs y steps per inch calibration
they're all the same size!
well that's a good idea
plus it looks cool
also lets you measure parallelism of X and Y, in addition to scaling
without having anything that's known to be square
it's a really easy jigsaw puzzle
that's full power from our 25W co2, at a feed rate of 20
jepler: the real fun is cutting those out on a non-square machine, then mixing them up, and trying to fit them back together
20 IPM ?
all the pieces fell out when I picked it up off the bed
cutting acrylic seems to generate some liquid
i had it sitting on cardboard when I was cutting it, and it made little pools
that etched the plastic
you can see it on the squares
a proper raised bed would help, i'm sure
are you the person who linked to the bed made of saw blades?
that was me
that was 1/8" stock, we were also able to cut 1/4"
we had to move the focus point to the middle of the stock, and cut at 7 IPM
how do you focus?
raise bed / ocular?
the bed height is adjustable
there's a little plastic focus jig that was included with the engraver
basically the beam waist is 2" below the lens
on our machine
we have the bed height as the "W" axis on emc2
unfortunately the stepper for the bed moves it very slowly and the home sensor is at the very bottom of its travel, so we don't home it or have it calibrated
it would take serveral minutes to home it
"We.ve validated in a number of tests that VMware virtualised servers can run twice as many applications than other hypervisors at equal or even greater performance levels."
i call bullshit
"so even if it's more expensive than the competition, by sticking more VMs in the same hardware you're actually saving money"
i don't understand how vm can beat a hypervisor
i'm not disagreeing that they're claiming it
i just don't understand/trust how they came to say it
I simply linked it, cause there's a pdf where they might explain it
I didn't bother reading it :)
toastatwork: it's only targeted at M$ Hyper-V
i'm not curious enough to actually read the pdf, but it just seems bizarre that they'd get TWICE the performance out of their implementation
versus other solutions
to be honest, they did start 2-3 years before the others
that is true
also i am facemilling a large block of 304 right now and it takes forever
which i suppose gives me lots of time to sit on irc and complain about how long it takes
the only thing I can think of (without bothering to read the PDF) is that they have drivers to go in the guests, which may remove some shenanigans that have to be done in the Hypervisor otherwise
toastatwork: I guess you should mill it on vmware instead of something else
toastatwork: On a MBP (which has BootCamp), I kinda find it ironic that the EXACT same XP install performs as good (or sometimes even better) under a VM that it does nativity on the same exact hardware.
jepler i hear it'd be twice as fast
not twice as fast, but you can mill on twice as many vice's at once
there's this insert mill that's making a really loud popping sound
and i can't figure out why
oh, that's why
we're conventional milling stainless steel and the mills are recutting chips
that sounds bad but I have noi dea
no idea :)
considering the chips work harden after they're cut, it's pretty bad
oh i see
it's like they're tempered?
from the heat?
no, work hardened
material that is very malleable, like stainless
it has like a 50% elongation before failure
the grains fracture and slip in the metal, and smaller grains are harder
it's the same kind of strength imparted by forging
or cold working
so recutting them would be very bad for the mill
good night all
also sometimes the chip doesn't recut
and just jams between the tooth and the work
then you hear "ping"
and you suddenly own one fewer endmill
that happens mostly with smaller endmills
these are 1 and 1 1/2" endmills, so a a chip won't break the tooth
oh dear ...
why do people have to tempt me with gas turbines
Hi all, just tryed to run stepconfig on firends machine and got a traceback error see here http://innovative-rc.co.uk/stepconf-error.jpg
read only filesystem?
its made files in the home folder, under name of mill i gave it to call it
its written the ini file, but hal file is empty
i just try it quickly on my machine and it has same error even with default values
did you check to see if /usr/share/doc/emc2/examples/sample-configs/common/emc.nml exists?
how did you install your system, live cd?
it's not a live cd
is it the 2.3.0beta2 .deb?
CVS latest (as of sunday)
you compiled a .deb from CVS and installed that? or you're running out of your sandbox with run-in-place?
run-in-place shouldn't look in usr/share
i agree ;-)
rob__ maybe not :)
rob__: are you on Trunk or v2_3_branch?
yea that location does not exsist, /usr/share/doc
uh oh, now that insert mill is glowing erd
i am not okay with this
2.3.0 beta 1 mine is
rob__ did you make install?
did configure give you any problems?
rob__: wait, what? did you do a make install or dpkg -i?
CVS checkout of the source tree, correct?
looks like configs/common doesnt get installed by make install
i don't see how a dpkg -i is going to do anything other than issue errors
the configs/common files *do* get installed by the .deb
rob__: look in /usr/local/share/doc/emc2, is there anything there?
yes thre is
is there examples/sample-configs/common/emc.nml?
i wonder why stepconf thinks it should look in /usr/share instead of /usr/local/share
i bet the "make install" gets less testing than the rip and the deb... so thanks for testing it ;-)
so i do deb this will fix it right
i think so
is there a "make uninstall"? if so run that first and cross your fingers ;-)
ill have give that a try 2morow night
do you have local changes in your CVS sandbox? If no, it'd probably be easiest to just install the 2.3.0 beta .debs
no i dont
are you on hardy?
great! this should be pretty easy to get working well :-)
[22:03:15] <seb_kuzminsky> http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?Installing_EMC2#On_Ubuntu_8_04_using_precompiled_EMC2_packages
i think you just have to download and run that script and it should take care of it all
install 2.3 beta
ill give it a shot later, thx
would you please also file a bug report on sourceforge, against Trunk, that after a make install in /usr/local, stepgen still looks for sample-configs/common/emc.nml in /usr, not /usr/local
is beta2 out yet?
yes, it just came out
(not really emc related, but...) can someone tell me difference between a CNC Mill and a CNC Router? spindle power? some arbitrary limits?
routers tend to be fast machines, in spindle and linear movement
they're not as accurate as a mill, lower horsepower
the Z axis tends to be smaller
sometimes they have a vacuum hookup on the spindle
not really intended for metal
a lot of routers can be had 5 axis simultanious for not all that much money
whereas a 5 axis mill is $$$$$
they're tailored for wood, wax, light aluminum work, etc
they deal with abrasives better
so what's better for small circuit boards?
and if you build it yourself, is there still a difference?
probably a router, for the spindle speed
but depending on what ELSE you want to do, aside from circut boards
will give you the answer
heh, I want it to be able to make parts for a more precise one.
if you build it yourself, you are going to be building a machine more in line with a router
toastatwork: do you have internet access at your cnc?
any advantage to board based stepper drivers vs. commercial drive units? I can get working, pulled stepper parker drives for pretty much nothing
i have wireless access in front of it, does that count?
jdhNC: you should send all those parker drives to me
jdhnc: i dunno, you'd have to ask one of these more knowledgable gentlemen
If I could get a batch of Parker drives for very little, I'd be all over that in a heartbeat
eric_unterhause1: what did you mean re: internet
next... does anyone use headless boxes for emc with remote X displays? any latency/lag issues?
toastatwork: I was just curious what machine you were using for IRC
sounds like he's haxq0ring your mill
im in ur mills cuttin' ur steel
jdhNC: I think it would work fine
my millz isn't on the internet due to laziness
jdhNC: it works ok but I'd be careful with fast continuous jogs
both mills i am running right now have fanuc controls, they don't do anything but cut metal
no vim or solitare
one more... can you feed step/dir pulses back in to EMC as encoder input?
what is the goal you have in mind that makes you ask that?
so you could have a manual jog control that also fed steps to the drives and emc would still know where you were.
oh you mean a jog wheel
they are quadrature, and yes they work great
jog wheels make the world go round
jdhNC: feed the jog into emc
yep the best way to jog, hands down
I had a reason to not do it that way, but it seems to escape me now.
I thought about doing it the other way on my mill, decided better of it
sorry, not doing what, what way?
not feed a jog+/- to emc but generate steps externally
my drives have an extra encoder input for that purpose
I decided not to use that
a milling machine cannot obey two masters :-)
np seb_kuzminsky glad can help ;)
cradek and lord help you if it tries
now there's an idea: cheese lithophanes
fenn, the thought had never occurred to me
it neednt be custom machined: you could make a mold to press/cast the cheese
|newbie| is now known as dareposte
darnit -- I clearly remember stocking up on radioshack perfboard two years ago, but I'll be damned if I can find my stash now
just mill some out :P
stripboard.py should be easy enough
sup.. you know of a GOOD ct50 jig grinding attatchment??
not just an overspinner
I have nfc even what a CT50 is... and can't even think of anythign funny to make of it either
CAT 50 spindle sound familiar?