I run the wheel backwards
I don't own a mask..
But then I grind a point no more than once a month.
and i have a dedicated grinder for doing tungstens on
I do nothing on that wheel but tungstens
yeah only time i weld anymore is when something is broken i don't fabricate much with welding
sometimes some things there is no getting around it but I prefer drilling and bolting
ever tried Zr ones?
I think they are brown (the color code at the end)
I only have a box of 2%ers
I don't even know what the different types are for.
I have read it, but fogotten it again.
I think my machine came with one plain electrode
Thorium ones are for DC welding
the plain ones suck big time
but remember that Thorium is a "bit" radioactive
So, thoriated is not great for ali?
so I'd still use a mask for grinding them
alex_joni so's Grand Central Station
andypugh: the theory says it's not best for AC
but otoh the most our customers use are Red (iso)
that means 2% ThO2
thats what mine have is a red band
I just checked.. red for AWS too
Interesting fact. If we switched all the world's power stations to uranium fusion tomorrow, we would run out of uranium in a few tens of years. If they can make thorium fusion work, then known reserves will last 10,000 years.
(obviously americans need to have their own standard for everything)
American Welding Society
andypugh: lets switch it to solar
then it runs out in a couple more years
alex_joni trouble with solar is its there when you need it least
I think we need rain-powered cells on the roofs here in the UK
I reckon we should be spending gigabucks on all forms of fusion power
best plan i heard for solar pumped water into a lake then ran it into this huge underground cavern at night then the next day pumped it back up again
need a large number of convineantly located caverns
oh this cavern was man made
Or use a lake up a mountain.
There are schemes which store pressurised air in caverns.
it was an awesome project
blowout in one of those would be exciting
And there has been a pumped-storage hydro scheme in Wales for 50 years.
geothermal works fine too
we have one here as part of the snowy scheme I believe
alex_joni but does geo thermal cause earthquakes?
it's not that deep
probably used mostly in areas where there are lots of earthquakes
alex_joni heh i read a headline like that recently I didn't evne bother to read the article
I saw a working design with lots of solar panels which used to store the heat into the ground
then extracted it in the winter
There is a geothermal scheme that is on hold while they figure out if it was the cause of a mud volcano
it was heating an entire village, also getting the heat from solarpanels mounted on all the houses
what does keep the Earth's core hot I mean you'd think it'd have cooled off by now
Partly nuclear reactions, partly tidal stirring by the moon.
oh come on the Moon?
but i have heard the nuclear reaction thing
what i do know iswe do need a lot more cheap safe energy than we have now
Energy = force x distance. The rock-tide isn't as high as the sea-tide but that is still a collossal force over a finite distance.
eventually the Moon will break free of Earth orbit
it is spinning away from us
moves the crust of the earth up and down by about 50cm
but i don't think anyone here has to worry about the day that happens
but yeah current theory is most of the heat energy in the earths core is nuclear
Valen thats just crazy!
lets hope it all doesn't settle in the middle of the planet
its over a pretty large area ;->
I think because of the Moon is why life evolved on this planet
tides and what not
[00:16:22] <toastydeath> http://img.alibaba.com/photo/108944598/Rotary_Forging_Machine_as_GFM_.jpg
[00:16:27] <Valen> http://www.physorg.com/news62952904.html
toastydeath thats just great throw one in my back yard will ya?
I saw a machine like that at Forgemasters in Sheffield, It made a hell of a noise.
yah 90% of the heat is nuclear
andypugh so does my neighbor when he gets all drunked up and shoots his guns
hah suck on that enviroweenies ;->
Actually, it's probably not quite the same, I think in the Forgemasters one the hammers rotated and the billet stayed still.
OK there's three guys hanging out in the little booth but what are they all up to?
watching the show
controlling the radial forge and the manipulator
thing looks empty to me
look in front of the manipulator.
the yellow Zamboni looking contraption?
directly in front of it, in line with the forge.
at least two of those guys have their backs to the job
no, all three of them are looking away!
what surprised me was that they would take a huge billet of metal out of the furnace, and leave it there while they went for lunch. A bit different from doing stuff at home where if it is still hot when it gets to the anvil you are doing well.
must be a cute girl walking by fro mthe office or something
yeah, I always wondered how long they have between heats
i guess many hours
I worked with a guy what worked in a steel mill he said just putting plate through the rollers heated it up
they'd cook their lunches on the plates
hey there's even another guy on the right of this pic but he's all blurry
and he's looking away from the work too!
andypugh did you see my new board art?
[00:50:02] <pfred1> http://img710.imageshack.us/img710/3529/saa1027brd.png
it looks like i can handle making that
SMT saves drilling though :-)
I'm too old and shakey for that stuff anymore
I'd be doing lots of dep knee bends picking up parts off the floor I can't even see!
that and i don't stock any SMT
I did it years ago at a board fab house and just grew not ot like the stuff
Hmm. Is £50 a good price for 3 x 500W servo motors? (1.3Nm / 7.5Nm)
whats that in USD?
No, rather second hand.
how second hand?
like they all work right?
I would have bought them by now if I was sure how to drive them.
The big problem is resolver feedback.
[00:53:25] <andypugh> http://cgi.ebay.co.uk/3-X-Quality-Lenze-Servo-Motors-CNC-3-AXIS-MACHINE-USED_W0QQitemZ250601674134QQcmdZViewItemQQptZUK_BOI_Industrial_Automation_Control_ET?hash=item3a59061596#ht_500wt_1137
BTW driving servos is a piece of cake they run just like DC motors
driving them with any kind of positional accuracy is another matter entirely
These are AC servos with resolvers, I am not clear how you drive them. (Brushless DC I understand)
MarkusBec is now known as MarkusBec_away
andypugh pfft time left 25 days who knows what they'll be by then?
oh well then
These are quality units. Would cost a fortune new.
the controllersl ook like they'd cost a fortune
Yes, but we don't need smart controllers, EMC2 does all that.
andypugh OK find out just what kind of controllers you'd need then
because like you said these are AC not DC that might matter a lot
Indeed, and resover feedback does not play well with EMC2
yeah who needs a matched set of 3 paper weights?
lets just say this if they were that great a deal someone would snatch them up in short order
Especially when I have a perfectly good CNC machine already, that doesn't need any more "Upgrades"
so maybe there is a gotcha in there somewhere?
yeah with stuff like that i like to see a clear path before i start out
and AC might be quite the roadblock I donno
all I know is I design sexy boards anymore!
Yeah, looking into it the drives are a bit more complicated than BLDC
Time to sleep instead.
I thought i was good a dozen boards ago I just keep on getting better at it though
I can actually SEE 12 sq ft of my workbench! I haven't seen that since I moved in
Jymmm are you feeling OK?
I cleaned off about 4ft^2 the other day so I would have a place to put stuff
Yep, been cleaning out and getting rid of shit
I'm just waiting for rush hour traffic to get over with, I want to drop off cans of coffee at the shelter.
I have spots that are intentionally for clutter and other spots that i try to keep clear to work on
pfred1: That' why I got that 5 drawer filing cabinet last week
I'm big into shelving though i have a fair number of drawers here and there too
Jymmm: a new one or did you find a source for the old, really nicely built ones?
I have chrome rolling racks for shelving
ds3: HEAVY DUTY 5 drawer for free
I have every available bit of wall shelved here i believe
pfred1: I have one shelf, and I use it for parts jars.
Jymmm: nice... :)~~~~~ I got one for the hauling and now all the new ones they sell are just crap :/
I want everything to me as mobile as possible.
heh I have one bench here i made over 16 feet long and its on casters
I'm getting rid of everything big or bilky
let me find a pic of my rolling bench
I had those plastic drawers that you can roll around, empty now. As soon as I can get to one spot I'll sell em
ds3: interested? they're nice for what they are.
its not immediately obvious but the bench with the yellow thing on it in this picture rolls: http://img706.imageshack.us/img706/9483/pict0344.jpg
yeah wit hthe thickness planer on it
Jymmm: the drawers? or more filing cabinets?
and wth you need two saws for?
that whole bench is on 6" casters
ds3: plastic draweers on wheels
Jymmm what my radial arm and table saws?
Damn, 2 weeks wasted searching for assy lang bugs and it was a 1 letter typo in the CPU
I excel at generating hard to find bugs I guess
table saws blow at cross cutting
pfred1: put in a nice blade then
you can hurt yourself trying to nip the end off a four foot long piece!
nah just the way they are its too much leverage
trust me RASes are nice to have
Jymmm: got a catalog picture of which ones? I have seen 3 or 4 kinds at the usual suspects
pfred1: and get rid of that 1980's PC above the garage door!
all I do on the tablesaw anymore is rip
Jymmm oh thats a new PC
Jymmm I've really got them fro mthe 80s
pfred1: trash it
hey i just fired up an old PC the other day and loaded Doom on it
hang on a little longer, almost antiques
ds3: This, but one is 3 and the other is 4 drawer http://www.target.com/dp/B002SYGB3Q/ref=sc_qi_img_viewdetails?ie=UTF8&title=view%20full%20details
I was going to use it to test my port buffer board on but never did get it to boot a floppy
Oh those... I'll pass...they won't survive in the shop
ds3: I need to find/locae the the top for one of them. I think I know where it's at, just can't get to that corner yet =)
ds3 I have some of those i keep electronic parts in them
pfred1: I also use the wider version of those as a cloths drawer
ds3: No, they work nicely. It's just that I don't have the floor space for them.
ds3 I have this sort of wire drawer thing in my closet
Jymmm: depends on how heavy of a thing that goes in there
ds3: It's not for storing pipe fitting in
Jymmm: I have the wheelless versions of that along with the containers
ds3 i have one of those bins filled up with a number of stepper motors it holds up
I have had too many stellite things crack on me
wow this pic is old I hadn't redone the table on the RAS yet in it
Jymmm there's 6" I beams under that rolling bench though holding it all together well that and 5" lightweight hot rolled angle
Jymmm slap a piece of wood over those cabinets and instant desk!
pfred1: I use lab benches for desks
pfred1: they are jsut abuse proof
I started working on a new top for one of my workbenches never got around to finishing it though
Jymmm: the color scheme and the shallow depth suggest they are the modern thin ones
ds3 the handles look cheesy
here's a pic from my old garage when I made my workbench: http://img13.imageshack.us/img13/408/p9100001.jpg
but i want ot make one of those european style tops with the fancy vises on it
hey, quick question... for a haas lathe, the tailstock encoder is.. not really working, it will jog forwards but not back, how do I force jog it?
I think there is a key combo, but I'm not sure what it is
how can i make a pause? in g-code ref it's M0 but it doen't suite: it stops running, P200 e.g. doesn't work at all
pause for 2 seconds for example
mk0: on the hass controller its g04 P2 (for two second delay)
mk0: if you have a list of G and M codes, search for dwell or delay
yep! ffuu i was looking for "pause" then in google ocassionally saw dwell is pause
PCW_ is now known as PCW
good morning from germany
the tool.tab is this in inch or what size is this i use mm for my NC-code
sealive: tool.tbl is in unit what your machine use
justin__ is now known as JustinXJS
Mortez-cs is now known as Mortez
MarkusBec_away is now known as MarkusBec
[13:28:30] <skunkworks> http://electronicsam.com/images/KandT/conversion/servoamps.JPG
[13:29:45] <skunkworks> http://electronicsam.com/images/KandT/conversion/Toolreader.JPG
[13:31:41] <skunkworks> http://electronicsam.com/images/KandT/conversion/Shellmill.JPG
How does he tool reader work? mechanical switches?
way too clean in that cabinet :)
pcw_home: looks like a series of slots.
like a player piano ;)
combination of slots makes tool#
then again, I could be wrong :P
I was wondering how the pickup head read the slots/rings
everything is metal, no?
Yes so maybe inductive, only skunkworks really knows
does he? ;)
Interesting, wonder how reliable they are
skunkworks eewww, diet mountain dew? :-/
diet soda is disgusting...
;) - I don't drink it - it is only for scale.
skunkworks: neat pictures
oh it uses mechanical switches? I wouldn't have guessed that.
Looks like maybe 7 switches and 8 fixed alignment blades
skunkworks nice shellmill
many inserts = large dollars to refill
PCW_ is now known as PCW
so.... 10.04 in the works?
elmo40: shell mills are teh awesome for removing large amounts of material and fingers
PCW_ is now known as PCW
PCW_ is now known as PCW
Just this once .. here's the log: http://www.linuxcnc.org/irc/irc.freenode.net:6667/emc/2010-03-26.txt
pcw_home: it is 15 blades.
I was just thinking - I probably have to use one as a trigger - wait so many ms - then read them all.
15 switches? so 32767 tool #s
* skunkworks doesn't have 'that' much tooling.
when I clicked on the linuxcnc page in June '09 and saw nothing was updated since Dec '08, I was worried. I was hoping it didn't die (like so many other great linux apps)
no updates simply means it's finished :)
but nothing is in the News section describing a 10.04 in the works.
Have you looked at how they are coded? the code may have parity or "tool there" bits
News for March, it still works fine
MattyMatt: nothing is finished. ever.
the unix philosophy encourages stuff to be completed. you add features in a new program, instead of bloating the central app
pcw_home: I don't see anything like that.. (wondering the same thing) The prox sensor doesn't line up with the reading of the head either.. They my have done it all by timing.
is the chain driven by a servo with encoder?
prox sensor fires - wait 1 second - read tool. (the chain is driven by hydraulics and gearbox)
no feedback other than it knows when each pocket passes a prox sensor.
tool taper gives a bit of leeway I suppose
I suspect that counts as taper abuse though
For mechanical switches you may want a latch per bit so if a switch is ever on in the sample interval it is
latched, then the latches are cleared when ready to sense a new tool
an optical or hall effect sensor is simple to retrofit, if that's what you care about
glue a magnet to the top of each pocket
is one of the blades larger or smaller or offset from the rest?
if so, that's your trigger
MattyMatt: they already mounted a hunk of metal on each pocket just for the prox sensor.
Contacts close when pushed in?
I'd imagine the word on the contacts is valid when the prox sensor is active, that'll be your narrow blade so no delay would be needed
Thats good, so even if the contacts are noisy. latching the closed state would make it quite reliable
so use OR for debouncing?
assuming closed = 1
I am pretty sure though that the prox sensor doesn't line up with the readhead.
so I am not really sure how the original control did it
get a 16 trace osciliscope and see
then maybe think of the prox as "test this value now, and clear the latches to wait for the next one"
was it here or #dsdev that people make $100 32 channel logic analysers from fbga boards?
the prox sensor may happen between tools so "save and clear sense latches"
I think pcw's plan is good: each bit should latch on any rising edge
does the chain only move one way?
one -|^|---(S)- for each bit, and later |^| on the prox should latch the value, and |v| on the prox should (R) all the bits
MattyMatt: originally yes - it didn't know where the tools were, it just looked for the right one and, if found, loaded it
so it only went the direction where the reader was "before" the spindle
really neat steel barcodes, I wonder if that was patented
I hope not, that's how I hope to do the encoder on my lathe
laser a gray code on the bed
maybe so small that a laser is needed to read it :)
cool - that seems easy.
I hope so
Since this is a 60s? machine the patent would have expired
I was shocked reading 1910 pop mech how little has changed. we've got computers, that's it
designed in the 60's delivered in 69'
the woman wants me to marry her... any thoughts?
do you have enough land to support a family?
wives are harmless if you have a few acres
does a townhouse constitute as few acres? :/
pcw_home: I should...
elmo40: I truly doubt this is the best place to ask for marriage advice
not really, unless it has a soundproof basement
and 3 phase :)
MattyMatt: have you seen the Resolute encoders? I think they use a metal scale
here are some factors. 1) I can tinker in the garage till the wee hours in the morning (but she won't cook me dinner) 2) I have a few Linux boxes here, including her laptop 3) sex is great 4) she already has a brat, don't need to make any more 5) educated, though currently unemployed.
I think what cradek said still applies...
get the brat to run your forge bellows either way
those linear encoders from copiers/laser printers look good, if a bit flimsy
laser diodes aren't coherent enough to measure phase change unfortunately, or else you could have a travelling mirror and count interference waves
or am I wrong? can you get quadrature laser encoders like that?
Ive got some kind of linear encoder here (renishaw?) that just has what looks like a gold mylar tape stuck to the track
very high res
tape has color fringes like a grating
probably like an old style optical mouse, they cam with a special mat
does it give absolute position on power on?
that's what I'd like, a fully self-aware machine
I want to fit a camera so it can ispect its own tool :)
The one I have with the tape is relative, the Resolute encoder is absolute
I was thinking of a mechanical rev counter for the leadscrews, but that's asking for trouble
how does a digital vernier caliper work?
Just trying to avoid homing?
They are capacitive resolvers
I played with an absolute magnetic encoder
poor resolution, only 256 counts / turn :(
there a 12 bit one available
even 8 bits might be good for a tool turret sensor
I'd use a stepper, or hydraulic steps. alignment would be done by the locking bolt anyway
iow, like that K&T
a bit like
So the turret would have to home at startup
a turret wouldn't need many bits for a simple absolute encoder
less than 16, that's for sure :)
I was just thinking of things like the Hardinge HNC sensor, one of those absolute magnetic encoders could replace it
I know nothing about real kit, tbh
sherline lathes looked hi tech to me a year ago
Sure seems like if you have the space, retrofitting a real machine is the way to go
i_tarzan, pistons, pneumatic probably better, that rotate the turret one tool step
and then a bolt with a roller end, to align and lock
that was done with a solenoid to unlock for rotation, and a stepper to do the rotating, on momma's typesetting machine
240V solenoid iirc, to overcome the locking spring
the linkage was always breaking, but a carefully bent paperclip lasted 6 months at a time :)
bodger is me
MattyMatt: this is my turret encoder on the Hardinge minus the arm and magnet http://i47.photobucket.com/albums/f163/johnplctech/Hardinge/TurretEncoder01.jpg
haha yeah, never thought of 8 sensors
those are switches and the chip puts out binary so only 4 inputs are needed
I wonder how much torque you can get from a 3.5" floppy motor
the hub motor, the bldc one
enough to spin a floppy
as long as the floppy isn't damp
depends on how much you gear it down :-)
JT we sent your replacement 5I20 out yesterday
PCW_ is now known as PCW
pcw_home: did you figure out what was wrong with the other one?
Your card was well and truly dead, no idea why, it was not the EEPROM, the FPGA would not config
cradek, he didn't let it run :) the concrete might have given up first in the end
hi from germany is there anyone how uses heekscad/cnc
unlikely the way those gears were on stalks
sealive: best to join #cam
most heeks-guys are in there
including Dan Heeks once in a while
that's for me too. emc works great, now I need to generate some gcode :)
Dan Heeks and the hot Leeks?
* MattyMatt /join #cam
i'am already in cam
tho code generation is exelent
tryd a lot of parts from ProE/NC
import via Iges Wirerframe
perfekt just with the LMB over the curves klick on sketch and then on pocket and G0 thats ist
as fast as it shoud be
glad to hear it's working for you
but to generate parts with the system is tricky
[17:25:49] <sealive> http://www.pictureupload.de/originals/pictures/260310135024_heeks_rad.JPG
MattyMatt: there are no people there on cam as for houres
sealive, you should lurk in a channel
you were not in during a conversation today
i wars in and managed as Matt the first steps
sealive: IRC is like that.. you ask a question, wait a couple hours for someone to come online
put the docu is veryyyyy small
Well I've learned I have a talent to create bugs so subtle that they take weeks to find
pcw_home: it takes talent to do that ;)
what to learn that?
i.e. it takes talent to learn you've got a talent?
A simple typo in just the right place
why the hell does gimp has toilet paper as a Template for a new drawing...
[17:41:01] <alex_joni> http://www.flickr.com/photos/bladewood/4347882489/
for creating shit stuff
hmm.. I never knew there are different standard sizes based on country
Thats pretty funny, guess the developer had a slow day
here in the PX in RAMSTEIN USAFB there are all the paper sheets available US-EU-China norm
people do print on bog paper
your own paper rolls 25 rolls for 5 dollars you ideea on shit
sudoku is the best !
SWPadnos: an undo buffer stores diffs between machine states
if the whole machine state is stored before executing each line of gcode, you don't need to reverse the actual gcode
think about that for a few minutes
the amount of state that would have to be saved is considerable (all variables, all interpreter modes, machine state, etc)
no worse than a GL debugger
you also have to know how to reverse something
G2 gets reversed with G3, not another G2
a GL debugger doesn't need to operate a machine in realtime
and isn't limited by kernel memory allocation issues (limited pool that can't be swapped out)
I was thinking at the higher level. I expect most situations where you'd want to reverse would be while debugging a simulation
I would expect the opposite
that people would want to step through a program (or reverse it) on an actual machine, while watching motion
yeah I suppose
this also gets to the reversal issue for EDM, and also following complex paths in reverse to extract e.g. a broken dovetail cutter
MattyMatt: someone is in cam
daniel one of the masters!
if it can put the material back on, I'm all for someone writing it
cradek: Come on... you know it's "Measure once, cut twice!"
oh - whatever - you're just making it more complicated. You just reverse it!
cradek, pcw_home, Cool Ideas. Seem like it should be easy to impliment.
skunkworks: ¿ʇı ǝsɹǝʌǝɹ noʎ ʇɥbnoɥʇ ı
for some reason - the 'e'(s) in reverse showed up as blocks.
skunkworks: are you going to do it the dumb (original) way? seems like you could also have a program that reads all the tools and fills out the tool table.
skunkworks: your client sucks =)
skunkworks: (it's basically unicode)
cradek: I think I am going to start out simple for now. (have it read the tool and place it in the tool change location)
if it can prep ahead of time (and it can) that'll be fine as long as it doesn't take a super long time to travel all the way around
right. You would usually send the tool prep right after the last tool change - so it would be ready for the next.
emc actually sends the prep at read-ahead time, so you don't even have to do anything that special
(I'm not sure it's a feature, but it doesn't hurt anything to do it that way)
yeah it won't read past a tool change, but it will send the prepare as soon as it sees it
so if there is a Twhatever way down in the program - it does it right after the last tool change?
yes unless there's something else that stops readahead, like a spindle or coolant on/off
but yeah if it's just a bunch of motion it'll do it right away
ok - interestin. It is good to know - I would be e-stoping wondering why the toolchager was taking off. ;)
yeah it confused me at first until I figured out the pattern -- and it's never loaded a wrong tool
Strange problem, after homing the axis takes off until the follow error is exceeded.
It only does this if HOME_USE_INDEX = YES
do you mean until it hits the limit switch?
if so, it's just because it's looking for an index pulse and (apparently) never finding it
No limit switches on the machine.
ok then can you say specifically what do you mean "the follow error is exceeded"
It does seem to find the index pulse, and it puts the homed icon in the display.
exceeds the allowed follow error in the INI file.
you get the error popup saying this?
I'm a bit confused about FERROR vs. MIN_FERROR, that might be a problem?
so you poke home, it finds the switch, then finds the index, then immediately gives a following error, but still finishes homing and displays the homed icon?
Also I put in the side panel displays for commanded pos., feedback pos., and axis.0.f-error.
And I can see that for an instant the f-error is zeroed, then starts running up as the axis moves.
what kind of a machine is it?
To make matter stranger, this morning the upon starting it all up, the problem was gone! ... while homing the X axis only.
It is a South Bend Magnaturn 612, largely gutted of the lightning struck electronics and redone by me.
do you hear a thump when it finds the index?
what would that be?
I think you might be having the problem that's fixed in 2.4 but not 2.3. It's cause is complicated but the result is that the first servo period after index reset has a large unwanted velocity output. After that period is over, everything goes back to normal.
if you are running git 2.4 branch or master, you can fix it by hooking up pid.N.index-enable to your existing index-enable connection
Recently updated via the update manager.
maybe the easiest thing is to wait for 2.4.0 then. If I am right, homing an axis the second time will always work and not ferror. Is this what you are seeing?
The problem is persistant.
skunkworks: Since your done bldg garage, time to build the inlaw house... http://www.youtube.com/watch?v=4Z7WI2v1Mh8&NR=1
more precisely, I mean the first time you home X in an EMC run, you might get the ferror. The second and subsequent times you home X in that same emc run, it homes fine.
same for Z of course
if you would capture a plot of axis.0.f-error and axis.0.home-state when this happens, it would help confirm my guess at the problem
but if you're seeing the behavior I described with first vs subsequent times, I'm 99% sure
sorry, phone interruption.
once it happens, if I click the power button icon to re-enable things, the axis starts moving again until it errors again.
There seems no escape from this pattern.
huh, that part is extremely weird
EMC must be exited to get out of the mess.
terrylm, what kind of motors and encoders do you have?
does the axis.N.amp-enable correctly enable/disable the amps? the encoders don't get powered down or something according to that signal do they?
5 phase steppers (orig. equipment)
ok tell us all about your setup :-)
4000 count quadrature encoders with index, also original.
ok, I think you have to do more work to use stepgen with index homing
stepgen feedback doesn't change when the index pulse comes in, so there's a guaranteed mismatch between the position stepgen thinks it's in and the position emc thinks it's in (since the motion controller is getting its feedback from the encoders)
The drive amps are sort-of-original, but the op-amps where burnt and I replaced them with different ones.
so it is trying to catch it's own tail?
I don't know if there's a solution to this, except to modify stepgen so its internal position counter can be reset on index
to zero that difference?
yeah, I think so
it's just confused
still - what is your setup? your using stepgen and printer port? reading the encoders back in?
I don't think the hardware makes much difference here - I don't believe any stepgens have the ability to reset their position counters from an external input
it may be possible to do some sort of latch with a mux2, and add/subtract that amount to/from the stepgen command position
I think your only hope is to use stepgen in velocity mode, with pid
ok, back to accounting (again)
or don't use index homing, or use hal to feed index+switch into axis.N.home-sw-in at the right stage of homing (which you configure for the double home switch search, with the second search being very slow to catch the index level)
(hack hack hack)
The latest stepgen has index and probe inputs but there no driver support
PCW: the hostmot2 stepgen?
nuder phone call...
no emc support either
yes, stepgen to parport with ecoders.
I just copied the encoder logic, so that index or probe inputs capture the current (16 bit) step count and set a flag
This is a good read http://www.linuxcnc.org/component/option,com_kunena/Itemid,20/func,view/id,286/catid,10/limit,6/limitstart,0/lang,english/
PCW: interesting - maybe emc doesn't need to do anything special then
I have a 5i23 card on order, so the parports are temporary.
PCW: maybe we could find an encoder for one of seb's steppers at cnc workshop, and try to get it working. I think more than a few people want this.
I tried to make it similar
(didn't realize terrylm was using pport, that's brave with 4000 count encoders)
ya, the spindle encoder is useless :)
The Mesa board will fix that though.
I can cobble together a config to try
So glad I found this bug thats been driving me crazy so I can work on more interesting things
I made a typo in the CPU used by HostMot2 for the Resolver input and the twiddler module
and spent 2 weeks trying to find an assy language bug that wasn't there
A side issue, that may play into this, is that my home-brew 5-phase driver board that generates the signals for the drive amps, seems to some times requier up to .109 inch of drive signal befor the motor will move for the first time after power up.
that sounds ... wrong?
This incurres a fixed following error that never changes once it starts.
.1" sounds like much even for me
I'm going to work on the firmware for it and fix that.
OH, it's 3:30! I got to go!
aa-danimal-shop: Was it you that was interested in my tool turret ladder? If so, I made it into an example in the classicladder section of the emc wiki.
PCW_ is now known as PCW
yea, it was me.... thanks! i'll check it out
Your welcome. Bye all, and thanks for all the help.
i just scored some titanium for relatively cheap on ebay
along with some hardinge tool holders for the lathe
sometimes ebay is good
not often, but sometimes
now i just need a cheap source for 17-4ph
tried to get dad to mount the 12" shell mill ;)
skunkworks: Since your done bldg garage, time to build the inlaw house... http://www.youtube.com/watch?v=4Z7WI2v1Mh8&NR=1
where'd you get that lil cutter lol
Jymmm: saw that. I have seen some local buildings done that way.
12"? that'd be great for decking engine blocks and heads
1 pass, no steps
skunkworks: I thought it was creative. Actually doesn't really look that bad either for what it is.
it is almost as good as the inlaws house.. It has been remodled so many times by someone who had no clue about loadbearing walls. I don't think any of the floors in the house are level.
I finally got them dam two parts done! 3 days for each one...
* JT-Work is heading home to talk to the dog
PUL/DIR is the same as STEP/DIR ?
which is the same as step/dir
hmm, when setting current i found a drive but it has jumpers, either 3.5A or 4.2A .. my steppers want 4A, what do i do then ? :)
but that wouldnt give me as much as 4A current would it? :/
just like it is now
1.8A insted of 2A with my current driver
MrSunshine_ hey whats new?
pfred1, found myself drivers in the uk and gonna order but current specifications is a bit fuzzy :P
MrSunshine_ I'm in the process of building a new motor driver myself
MrSunshine_ check it ouy it's psychedelic! http://img710.imageshack.us/img710/3529/saa1027brd.png
its Peak current i should look at in the datasheets when setting current isnt it? :)
MrSunshine_ for me it is what runs best
all I care about is what the motor turns fastest at with the best torque characteristics I can get out of it
need to build myself a bob i think ...
I did that and statically tested it haven't quite hooked it to a PC yet to dynamically test out yet though
what kind of tool goes in the center holder with the blue tool bit in it? http://i47.photobucket.com/albums/f163/johnplctech/Hardinge/Turret/Turret01.jpg
not so sure how I can enable the parallel port in EMC2 for regular operation I've done some research on it just haven't actually done the deed yet here though
there is no way to adjust the height of the cutting edge...
JT-Hardinge its cutting edge so it'll adjust the work height :)
JT-Hardinge, use 3/8" shank tooling
man I think this new board I drew up is so sexy I'm using it here for desktop wallpaper
aa-danimal-shop: then it will be way low
all 3/8" tooling will be on center with the work piece
it shouldnt be
unless yours uses 1/2" tooling
yea, mine is 1/2"
the HNC is 3/8"
use 1/2" cutters then lol
it says it is an extension holder what ever that is
yea, for facing and whatnot
JT-Hardinge well if thats anything like an extension ladder I want nothing to do with it!
i use similar ones
or for face grooving
anything where you need the tool to be parellel to the z
aa-danimal-shop thats what my old roofing foreman told me once ...
Hey guys, where in the book is the syntax for an m101 exampled?
sight, when contacting companies if i forgot to finalize an order to ask them to finalize it or resolve the problem do i use my transaction ID from paypal then for them to identify that they got the money ?
using a line: M101 P#40 Q#41 where there are values assigned to #40 & #41, seems to get zero output
Am I to assume that m101 is deprecated and I should use (print, variablename=#variablenumber)?
there's nothing worser than feeling deprecated
gene what are you trying to do
Hey, at 75 I resemble that remark ;-)
Trying to check all the numbers calculated for drilling me a 22-250 headspace gauge
hmm I im going to connect my drivers to some connectors for my mill, could I use my shielded wire stripped down the the shield?
so they are a bit smaller
* pfred1 is trying to stuff 10 pounds of you know what into a 5 pound bag
And some of them are damned ssmall because I'll be exploring the error band in the math for g2 to cut a tapered hole 1.51" deep on a spiral cut
frallzor run that by me one more time please
wire with shield and stuff, and an outer pvc layer
frallzor you have multi-conductor shielded cable and you want to rip it apart and use the individual wires?
strip down so its a bit smaller diameter wise for use to connect drivers to connectors
no one shield for all wires
frallzor so you don't care if these wires are shielded form one and another then?
the outer pvc layer is bulky for internal use to hook drivers to connectors so I want to remove it
And.... only connected at one end, the computer/driver end.
frallzor yeah wire is wire within limits
gene: M100-199 execute a program are you trying to print out a variable from your g-code file?
frallzor but it sounds to me like you're ripping apart more expensive wire to get at cheaper lengths
I'm only 56 but if it has to do with guns I'm with you
my favorite is my M1
its more expensive getting some cheaper wire for this =)
than using what Ive got
frallzor: Then get some proper sized connectors
frallzor so this is inside the controller box then?
we used speaker wire on our mill
Yeah, I just replaced a shotout shilen barrel with the whole Howa 1500 action & super heavy SS barrel, and the headspace won'y let my old ammo chamber
Jymmm the wire would still be a bit too bulky to drag in the box =)
frallzor what you're tyying to do is valid then because the signals are all in there unshielded from one and another anyways
frallzor its how it is generally done upon entrance to an enclosure is to break aprat wires so you can connect them to what you need to connect them to
the outer pvc layer is only to protect the rest from dirt and chemicals etc etc
inside = clean
frallzor yup just to tie it all neatly into a package
frallzor once you're in an enclosure you really don't need it anymore
any info somewhere on prefered connections in the parport to breakout board for emc? :)
I guess I'll go switch the code to use the (print,..) function instead. Back is killing me, so I'll ssh in for that part
like what ones should be step/dir and what ones are input etc?
I was thinking of getting shielded motor wire, but it was really expensive
gene: this might be what your looking for http://www.linuxcnc.org/docview/html//gcode_main.html#sub:Messages
and you might have to use print I don't know
MrSunshine_ I think getting started has the default pinouts
hmm ok :)
* JT-Hardinge goes back to screwing on cover plates :)
MrSunshine_ but with hal you can change any of this
yeah but better go with default =)
MrSunshine_ well cept whats input and output generally but that is just general port direction
MrSunshine_ yeah its is what i am shooting for myself
MrSunshine_ I figure easier for them to document it than me to
6 of ones a half a dozen of the other to me
[22:28:36] <frallzor> http://pici.se/p/large/cyTbdrKjD/
frallzor once I optically isolated my motor drivers noise wasn't really an issue anymore
that pretty much stopped the noise at its source
im using geckos, they should be opto-isolated?
I think they are
my bob is too
but Im doing this as properly as possible =)
yeah i think it is a bit fool hardy to have optos at both ends but I guess it can't hurt but optos are slow
Yes, I have that printout. But while I've converted a couple statements to that format, I am not seeing any output
I may be back later, dinner time
we may be here :)
typical optos are like 1,000 times slower than other standard logic
I found the output, twas in a shell behind axis. Duh, dumb old fart anyway. ;-) Thanks again
something to do with the miller capacitive effect on the base junction of the phototransistor I believe
though I bet a few of them chained together could make a bad assed digital bucket brigade delay unit!
when I get back to building guitar effects I'll have to try it out
alright i just moved the monitor of my CNC machine to where I don't get neck strain to see it now for the moment of truth, will that machine turn on?
it looks good!
congrats pfredl :)
VernonM yeah after I put a parallel port card in that machine it gave me a few fits then
I think it knows whats coming!
its like whats this funky OS I'm running? Now this strange antique hardware?