MarkusBec is now known as MarkusBec_away
Given that my mill DC motor and drive both seem to be toast, and that I have never really liked them anyway, and that there is no reverse option and I have a perfectly good VFD already hooked up to EMC2 for the lathe spindle... Is there any reason to replace like-with-like when I can fit a 3-phase motor instead for half the price and more power?
danfoss vlt 6011, is this a good little inverter? :)
It doesn't look little.
at most yes
seems pretty ok to be futuresafe?
What's the full part number?
Actually, it doesn't matter if you have three phase
I do =)
turns out its not even used
so I can do some re-wiring and get a nice man to connect it =)
Sounds like a plan
is a rating of 20A good?
Hmm, what is the difference between 3PDT and 3PCO?
I can never remeber
no idea =)
3 pole double throw and 3 pole center off or CP030
Do they make centre-off rlays?
I have not seen one but well...
OK, so they are at least as rare as I thought
I am just figuring out how to "share" my VFD between the mill and the lathe
And I think 3PCO is three pole change over
your looking for "forward/reverse" contactors so to speak. Only one can be on at a time...
they are latched so if one is on the other can not be on
Your vfd goes to x1,2,3 of both contactors and each device goes to t1... of a contactor
Contactors are expensive compared to relays. I wonder what the difference is in practical terms?
usually a relay is for controls and a contactor is for power
[01:06:16] <andypugh> http://uk.rs-online.com/web/search/searchBrowseAction.html?method=getProduct&R=2565155
you could use a three phase fwd/rev switch
Not cheap, and huge: http://uk.rs-online.com/web/search/searchBrowseAction.html?method=getProduct&R=6097454
just put a receptacle on your vfd and a plug on each machine...
* jthornton wanders off
say goodnight Gracie
what's the status with running emc on 9.10 ? I'd be interested in simulator mode only (on home computer, not machine-shop)
anyone knows of a cam program to handle a lathe?
(I finally found one)
err a lathe..
i'd be interested in knowing ifthere are any free ones
MasterCAM and the usual suspect does lathe but...
well, mastercam isnt really a option
and the post issues with it are huge
I'm trying to play with mastercam
its pretty damn big though lol
we make a bit of spare parts for machines that we build
what kind of machines?
mounders(I think's the name)
and well, lots of one off stuff for all kinds of machines
you were mentioning pistons and rods?
yeah for huydralic stuf
oh I was thinking engines and being all like "phwoar, hardcore" ;->
hehe I dont have thoose skills
I only play with rockets, nothing complicated like an IC engine
I'd buy edgecam in a second if I could pay for it..
but well, a part every few days or so(tiny stuff dosent justify that)
some stuff :) http://www.io23.net/ul/files/DSC00291.JPG
nice looking widgets though
whats the markings on the sides?
tape to keep the bearings from being contaminated
nice finish on them anyway
CnC mill too or just the lathe?
and a manual lathe
[09:14:33] <anonimasn> http://www.io23.net/ul/files/roller.png
something more for the same
it's funny 45 minutes per part on the lathe.. and then 7 minutes in the mill
and the lathe is doing the simple part
I just picked up a old cnc lathe
denford easyturn 3
with a broken control or motor
I hope I can get it working so I can make some air horns for theese things :)
though this is just hobby stuff :)
brb, I'm gonna go to work and start making thoose rollers
this is the controller setup I'd like, but it's overpriced for what its capabilities I feel -> http://cgi.ebay.co.uk/USB-Stepper-Motor-Motion-Controller-4-Axis---Made-in-UK_W0QQitemZ320441627159
probably wont work with EMC
[09:24:32] <Valen> http://www.youtube.com/watch?v=4pAxqw5yeZM
the modules plug into individual breakout boards, but one of those + module is 27.99gbp which makes an emc setup cost 80+
we are using 500W scooter motors direct driving ballscrews with linear scales
2A is enough for me for now :)
dunno what the exchange rate is atm but take a look at servo systems
mesa have some 4x100W driver boards for not too expensive
some cheap scooter motors (100W ones are like $5 if you don't pick them up from cleanups ;->)
and encoders ;->
plan A is still dremel some wood slowly, sell it and buy bigger motors
phase 7 will involve lasering gray codes directly on the ways for feedback :)
lol nice idea that one
I was planning on just running a laser interferomiter for distance measurement
;-> in my dream world
* MrSunshine thinks of making emc work on a 386 .. and run the cnc with it
would be AWSOME!
I have a fpu on my 386
so I won't be able to verify it :)
unless I plucked the 387 for hardcore testing. 20Mhz is plenty if emc is ported to DOS
why port to dos?
there is no non graphical frontend for emc ?
just run slackware or something
there are I believe
heck you don't even need to run a graphical front end on the machine
dos has 100% cpu. zero latency unless you choose to install TSR etc
dos = "devoid of system"
latency is limited by the hardware(ish) of the system not the OS so much
if you stick to VGA, you can pretty much 100% predict how long a GUI takes to draw
if you use a multi core/multi cpu machine, it doesn't matter ;->
that's the theory
2400 latency on mine
seems to work pretty well ;->
well it all will be interrupted if a interrupt comes even if its multicore right? :)
if your X driver gives permission for your gpu to hog the bus, then you're in trouble
answer, no X driver
minimal keyb & mouse interrupt handlers
MrSunshine, no because you reserve a CPU just for EMC
all it does is run your realtime EMC software
MattyMatt, my nvidia card is on AGP, and my mesa card is on PCI, no contention there
they can both grab the bus, contending with the cpu socket for access to dram. chipset choice affects this of course, but it's true on older ones
so in theory that should work even on a non realtimer kenel then ? :)
with multiple cores
if you can reserve a cpu just for the machine
if the PIO were directly attached to that reserved core, it would all be dandy
but it ain't. a 386 in real mode is directly addressing the printer port tho. no TLB etc
or whatever the port mapping is called
I use mesa hardware so I don't really need to interact with the printer port
the inkjet board I'm using for testing has 80188. I'm loath to bypass that but it's just TOO primitive :)
AAARGH. somehow I've drilled the mounting holes for one of my beams 4mm off
I'm measuring this all really slowly. I can't believe I didn't double check it
mounting SLOTS >:) they were gonna be oversized anyway
EbiDK is now known as EbiDK|AWAY
MarkusBec_away is now known as MarkusBec
MarkusBec is now known as MarkusBec_away
MattyMatt, I have not looked at the code but I expect realtime to be interrupting X, ie the otherway round
the problem will be video drivers also done in interrupts
MarkusBec_away is now known as MarkusBec
I'll find out when I delve in the source
dammit, got axles that isnt quite right ... they turn just fine like 80% of the turn then they go realy heavy to turn fine after the 20% again :/
i could bore upp the holes more, put in a ball bearing (got axial bearings on both sides atm) but cant find a bearing that is small enough =)
would need some low profile bearings or something :)
8mm inner, 12mm outer or something like that
what is that? :)
and the axle isnt perfect ... it got some groves in it ... so im afraid bushings would tear up to fast :/
[12:10:27] <MattyMatt> http://simplybearings.co.uk/shop/p120716/AL0812-12+Oilite+Flanged+Bush+8x12x12mm/product_info.html
oilite. one L
gonna try the motors with it, if it cant move it (i can move it by hand the part that is not going heavy .. the other part i need a tool
got a bottle of engineer's blue :)
see where it's rubbing
is the groove a keyway?
* MattyMatt just had a meccano flashback
MattyMatt, i have welded on an extension, then turned it in a lathe and i dont remember if it ended up that way in the process or if its something that has become in the place in the mill
but i cannot see any groves in the actual bushing its in now .. (its a pure peice of cast iron)
8x12x3,5 found a ball bearing i think could fit =)
i think its 8 and ive bored it up to 12 to be able to fit the axial bearings in there
hell, its even 19 the whole .. damn =)
and ofc, there is no 8x19 bearings :P
yes, there =)
yes that's a common size. I think that place I linked has them. roller skate are 22mm OD and they are cheapest
MattyMatt, well if i take it up to 22 the axial bearings wont fit =)
i was thinking 1||-1 , where 1 is axial bearings and || is the ordenary bearing and the - is just a hole that the axel passes throiught that ive taken up so the axel wont rub against anything =)
I would use cone nut + cup for both axial + radial
cone nut? :)
but most of my "engineering" experience is fixing bikes :)
MattyMatt, well i got non egineering experience :)
im just going as my gut tells me it should be =)
like on a bike axle. the cone nut is threaded on the axle, and holds loose 1/4" balls in a cup in the hub, so you get an angular contact bearing
one of those at each end of the axle, and you're sorted
hmm, sounds complicated =)
so a bearing that looks like <<->> you mean ? :) like on wheels on cars etc ?
it's as simple as it can be. 90% of the world's bicycles use it. take apart a front wheel and see
where the balls rolls between the <<'s :)
yeah. the << are curved to hold the balls but yeah it's angular contact like a needle roller but cheaper to maintain
when the balls wear, you can tighten it up.
I completely failed to locate a source for them tho, except for a factory in china
easy enough to make on a lathe I reckon
but you'd have to heat treat the cone, it takes all the punishment
the cup can be pressed steel
oh yeah there's a place in holland may supply them, but they'll be 9x1mm thread only, like a bike wheel
what dimensions is that? :)
9mm inner and 1mm thick or hwat? :)
9m diameter, 1mm pitch
[12:45:40] <MrSunshine> http://18.104.22.168/~xc50253/e-handel/upload/articlepictures/117_master.jpg
something like that is what im thinking
that's the best kind
tapered needle roller bearing
that's what cars use at the ends of the crankshaft
dunno if precision machine tools do tho
I think they do it like you are, separate thrust bearing for axial and bushings for radial
what kind of machine is it?
got any slightly less shiny ones? ;->
let me try getting another one
[14:48:13] <anonimasn> http://www.io23.net/ul/files/DSC00305.JPG
Is there a way to get EMC to always start Fullscreen without installing and running Devilspie?
EbiDK is now known as EbiDK|AWAY
Vernon, I think there are two ways to do it. first, I believe you can use the standards "geometry" command-line option
you'd probably have to put it in the run script, I don't know if that gets passed to the DISPLAY program
or, if you're running AXIS, you can put some code to maximize or change the window geometry in an axisrc file, which axis runs at load time
interesting, thank you... I'll try that. Yep, I'm running Axis.
(I don't recall exactly where the axisrc file is, or the exact name of it, but you should be able to find it on the wiki or in the docs)
Yes, I'll certainly try, those sounds like helpful leads, for sure.
them there sounds sounds like it
the run script is just called "emc" and I guess is in /usr/bin
here's the line that would run AXIS: $EMCDISPLAY -ini "$INIFILE" $EMCDISPLAYARGS $EXTRA_ARGS
ah yes I've been there earlier
the run script is at `which emc` :)
so it looks like you can pass in arguments to AXIS from the command line, if you know what to pass in :-)
geometry=1024x768+0+0 or similar
not a clue :D maybe (fullscreen) ?
or maybe it's 1024x768@0,0
yeah that sounds good, a size and location.
I have NO idea but I'm willing to try.
I broke my emc by upgrading ubuntu, so I can't test anything right now :(
mozmck, sim mode, dude! :)
there's a gdk call named "gdk_window_fullscreen", but I'm not sure if that's propagated somehow to tcl/python in AXIS
oh yeah, I forget about that. I'm working on compiling an rtai kernel for 9.10 :/
what's wrong with devilspie? it works great.
I don't want to add another running program, and the name is dumb. :)
never heard of devilspie til now...
delusions of demonic culinary grandeur, or something :)
mozmck: it lets you control position/size of windows easily
How about... starting Axis with something other than the demo program loaded?
there's an ini setting for that, I believe
( "Read the manual" is a valid answer.) :)
take a look at the manual
anyone following the reprap devel?
[18:05:53] <bluntz_> http://forums.reprap.org/read.php?1,12143
EMC2 now allows both (comment) and ;comment
MattyMatt, Seig X1
off for a while again =)
I was looking for a controller board design when I came across it
they got alot of nice toys for their controller
but I dont think I need the arduino with emc2?
does emc2 controll the drivers directly from the parport bus?
bluntz_: emc2 can output step/dir signals through the parport. most stepper drives take step/dir as input
how many axis can the parportdrive at once?
4 axes for sure
wish I was an electrical engineer
seems like I would need some kina central controller for all the other functions tho like lube tool change ect
I got 3 drivers to interface with (uln2003an) that are just switches really
bluntz_: you can get another parport with a pci-card. or get an IO card for emc2
ahh good id
so 2 parports would run 8 drivers?
then it depends what you want the 8 axes to do. I think emc2 internally has 6-deg of freedom xyz, pitch yaw roll
you need to map that somehow onto the 8 axes (call them joints!)
3 axis is fine
need others for other functions
like lube an such
I wonder how emc will like 2 parports tho
Id like a light and blower/vac at spindle as well
I kina doubt this will work
bluntz_, I have a 5 axis off one parport but that does mean no limit switches
yea thats not good
and what about tool sense ,estop,ect...
direct drive doesnt seem practicle
I use the pc keyboard...I remember where the ESC key is :)
and are you running your drivers straight out of the parport ?
did some anodizing tests today: http://www.anderswallin.net/2009/10/anodizing-aluminium/
anyone else done this?
awallin, I used to work at an anodising company for a short while, you dont mention the strip stage
improves strength alot
great for corrosion too
I washed the part in mild NaOH by hand first. if this is what you mean. I heard some people leave them in NaOH for longer before they go into acid/anodizing
and the finish lasts longer if you rub lanolin on it
neatest thing Ive seen tho is the deep freeze treating
archivist, why do you need it?
got any access to liquid nitrogen?
in theory yes... :)
huge strength gains
there are some advantages of working at a university...
think any kind of metal will work
but all my bearings and bushings would get nitro if I could
so you freeze them rapidly just after anodizing?
think maybe after freezing dunno
I would think if frozen last finish may get crazed
from the shrinkage
like ceramics do
but I wouldnt be surprised by 100% improvement in strenght
Gene asks why isn't adept showing the 22.214.171.124 update?
awallin do a washer and then shear test it please,would be nice to know
bluntz_ : were they freezing after sealing the anodize?
dont think so,think parts were raw
many years ago
but as far as finish goes
Ive seen the anodised alum last 10 times as long as painted in the feild
I dont think this tech ever made it to commercial production far to spensive
anyone got tips on where to get nice spindles for cnc? =)
dont say the chinese ebay spindle :P
i got a MT3 spindle etc from 'little machine shop' in the US and its been pretty good so far
pjm is it the sieg (badged) ?
umm not too sure, i'll get the link
[19:55:23] <pjm> http://littlemachineshop.com/products/product_view.php?ProductID=2636
the only thing I have left of that is the actual MT3 spindle and its housing!
all the other bits have been replaced with faster / better / red things
ahh too big and single phase :(
but thats a whole assembly :P
tormach has BT30 or R8 spindles http://www.tormach.com/Product_PCNC_maint.html
anyone using those?
pjm have you had it apart and adjusted the spindle preload
yes when i first got it i stripped it and re-did it all properly
awallin : what did you use for cooling during your anodize step?
looks like the russians were doing magnetic treatment of aluminum back in 73 got 50% increase
hmm guess I have to go with cheap chinese ebay spindle or a german elektromotor spindle then
pjm, was helping commission a sieg last night that also needs a strip and set up
[19:59:44] <bluntz_> http://www.springerlink.com/content/t6743h2512mr34r2/
frallzor u can get just the spindle / bearings etc from that company
awallin : is the plastic pail just there for spills or did you add some crushed ice to keep the temp down?
the plan was something like this http://www.teknomotor.com/
L84: I was not cooling the acid. Eventually it got quite warm. The plastic pail was for safety only. The powersupply shows output in watts also, after 1-2 hours at 10-15W the acid was maybe +40C, don't know if that is good or bad
archivist ah yes i read that u set up a sieg, presumable that was a manual mill? how did it all go?
pjm, didnt get time to do the spindle, but otherwise ok
awallin : the temperature of the acid should be controlled since it has an effect on how thick the porous layer gets
rate and porosity, time sets thickness as well
ok, maybe a more shallow bath with more surface area for cooling is better
some vats were cooled and some heated by the process
[20:14:14] <bluntz_> http://www.springerlink.com/content/vq20257j730108r1/
nitrogen bath had no effect on corrosion resistance
ok, quenching for strength and then anodize for corrosion resistance
10 amps overnight in a 5 gallon bucket
gives a pickled look to castings
but just barely cuttable with a hacksaw
need a test
thats just a deep anodised surface, the core is still in its soft/previous state
yes its the oxidized surface thats hard
check this http://www.focuser.com/atm/anodize/anodize.html
he's got a pretty good guide for DIY, finishing.com has lots of Q&A as well
where I worked the tanks had no covers, the atmosphere would affect your lungs for the first few days working there, after that you notice you never catch a cold
he has all the steps
Gene asks why isn't adept showing the 126.96.36.199 update?
gaaah i need my multimeter .. now! =)
Think I will try to get this...http://store.makerbot.com/electronics/electronics-kits/reprap-motherboard-kit-v1-1.html
to work with emc
fuck! I want to go to the states!
all the great fucking bands I would watch live... I'd die happy if I died there!