jepler are you still around?
I owe you a cold drink, that was the problem, buttttt now x won't touch off
y and z will but not x
ok, so you're in 'machine on', hit 'x' then 'end', what happens?
back downstairs to try
brings up the touch off window
ok, so it's the window that doesn't work?
what's it do?
if I enter a number it offsets by that amount
i.e. 0.0 = -9.5
-1 = 1-.5
could I have a offset variable set
maybe I'm not understanding touch off verses the g54 coordinates
there is also the G92 offset. You can zero it out by doing G92.1 in MDI
does it remember the g92 from session to session
[00:16:20] <jepler> http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?CoordinateSystems
I wish I had seen that yesterday.........I keep looking through the manuals
sometimes the right information is hard to find
believe me I know
I love the way emc moves, but.........setup and finding the right info to setup and then fixing a problem
i really appreciate the help, hopefully one of these days I can be knowledgable enough to pitch in
it's frustrating sometimes when I just can't get to the bottom of the problem somebody's having
did the G92.1 "fix" it?
pminmo, you could (a) put the information you were looking for in the manual or (b) make it more obvious if it's all already there :)
yes it did
woo now I'll have that cold drink you promised me
swpadnos, right now i'm too unsure of what I do know vs. what I don't to add/change anything
ok, then there's (c) - tell someone where you would have expected to find the information :)
I always to a "search" in either the emc user manual or integrators manual
but I understand why it's easier to have it in the wiki
ah - so there's no really good answer, unless you and the folks who wrote the specs use the same words
well IMO the answer is that the wiki text should be adapted to expand this section of the gcode manual .. http://linuxcnc.org/docs/html/gcode_main.html#sub:Coordinate-Systems
in my feeble mind the answer is a good "front end" for the .ini and .hal file
at least for 3 and 4 axis machines
at least section 1 of the wiki page should be, maybe the other sections go other places
pminmo: well, that's what stepconf is trying to be, for a certain class of machine
it's a step in the right direction, but since it looses sync with tweaks that need to be done manually
is stepconf written in python
yes it is
and what does the python development enviornment look like?
or is there an ide
personally, I'm an old style guy and I use a terminal and vi. here's a list of some of the more graphically oriented IDEs, though: http://wiki.python.org/moin/IntegratedDevelopmentEnvironments
have any recommendations
i.e. maybe know somebody that has a preference
well, I know that eclipse is well-respected by java developers and has packages available in ubuntu 8.04
I use kate, nano, or gedit FWIW
though I have tried Anjuta for some stuff, and I like it a lot (when it doesn't crash and take my work with it)
swp for a complete newbie to python
i can spell it thats all
I can read it, but only because it's similar in some ways to other text-based languages ;)
later I'm off to work on a machine.... thanks all
roman character set
that really helps me
hmm, the first result from this seach seems a bit fishy
[01:27:44] <jmkasunich> http://www.google.com/search?hl=en&safe=off&q=I-beam+strength+calculator&btnG=Search
this website wants you to install the 'microsoft dynamic html editing control'
you clicked on the result?
sure. whats the worst that could happen ;)
I've never seen a URL like "5.hwpjzdrbu.com"
whois doesn't know what it is either
I am assuming it isn't microsofts dynamic html editing control
but I didn't 'install' it
how does something like that manage to be the #1 hit on google
yahoo doesn't seem to return it at all
nslookup returned 184.108.40.206, and whois returned "extendedhost.com"
I was going to add an disabled/current limit led to the board.. but I could not find a place to fit it.. :)
plus I would have had to use one of the unused inverters because none of the logic can sink/source enough current.
not enough room to add a simple resistor either.
I think I may have reached the limit of the board. :)
what about it?
yet another H Bridge
they inverted the pwm for the right side after the flip flop..
skunkworks_, have you changed all the resistors to the vertical footprint?
jeez left side
SWPadnos: no. most of the time I am running traces under them
skunkworks_: I'm not going to try to read somebody's mind
IC3 looks very important!
(whatever it is)
jmkasunich: understood :) I am pretty sure the logic I am using is right.. As I did breadboard it and it seemed to make sense to me
over current should turn all four FETs off, until you reset them
you can choose to reset them on the next PWM edge, or by some other method
how you do that is up to you - there are as many ways of setting up the logic as there are designers
the way mine seems to work is once the current is tripped - the bridge won't come back on until the next rising edge of the pwm input.
that seems somewhat reasonable
a lot depends on your goals
as long as the current has lowered below
do you intend to run in current limit, or is your goal simply to prevent smoke?
to be really safe, you could reset on an edge of the enable signal
so once tripped, it will stay tripped until you disable and re-enable
hmm.. Do you think hitting the current limit too often will cause problems?
that all depends
on how far the trip point is below the smoke point
oh - in my mind it is quite a bit lower.
the max I will ever push this is 20 amps. the fets are 'rated' for 40. (they will not run at that - if you remember you helped me see the light about manufacturers lies)
[02:06:48] <skunkworks_> http://www.electronicsam.com/images/KandT/servostart/finalquestionmark.PNG
unless I change something :)_
or someone points out a stupid mistake.. ;)
I think it looks pretty
it does look nice
one question though - the thermals on the lower pads of the sense resistor - are those big enough for the current you want to push?
I'd not bother with thermals - you are going to mech etch and hand solder this board
(I guess I'm assuming that PAD4 and PAD5 are the output)
I think 6,7 are output; 4,5 are for the capacitor
5 is plus bus, 4 is minus
where does the tachometer hook up?
you are joking, right?
just pondering how different this is from my lathe
I found tonight that the huge transformer I assumed was the DC bus for the servos is actually the ttl power supply
the servo transformer is one of the smaller ones
thats weird - I thought you were gonna say the servo transformer was the even bigger one somewhere else
no, it's surprisingly small
1 ft3, maybe
well, the servos are surprisingly small too
oh, small in a relative way only - 1 cu-ft is a big transformer
it's a nice package with rectifiers, heat sink, etc. I can swipe it and use it as-is.
you need to take some photos
yeah I should before I tear it up
I spent (wasted) some more time trying to get it to read a tape tonight. It just refuses.
it is a smart machine
tape is for closing boxes
I thought it might detect the sprocket holes and refuse to run without them, so I punched some blank tape
when I hit estop, it jogs the tape backward six inches -- that's all it will ever do
it's silly, but I would have liked to see it run as-is a bit. it's as old as I am - pretty cool technology.
I have never been able to get into old electronics - old mechanics yeah, maybe old power electronics, but never the signal/logic stuff
interesting. I'm fascinated by this thing that can (should) pretty much do all the things done by a modern cnc, but doesn't have a microprocessor. it's like an alien artifact.
I didn't hesitate for a second to completley gut the control box on my Van Norman (contactors, etc, 1940's vintage)
like tube radios, I think of it as almost perverse - it's crazy what they had to go through when they should have just waited a few years and then done it so simply. [of course I know this is nonsense]
yeah, things like making one active device do double or triple duty
another crazy part is that in 76-78 there *were* computers that would have made it much simpler, but they had this monstrosity already in production...
the 8080 was everywhere
I built one in 75/76
how many engineering hours would it have taken to convert the hardware design to software, how many painfully discovered and fixed bugs in the old system would be re-introduced....
was in 3rd year eng scholl.... my department said "now what would you need a computer for?"
and who knows how the prices would compare
well, the price of an 8080 was probably less than 100x the price of a 7400 series logic chip
rca 1802, 1974
so if there are more than 100 logic chips, it would have been a win
heh, there are
but if it saved a few hundred $, it would take a heck of a lot of units to recover the engineering time
big boards full of cmos were also popular in the late 70's
even in the 70's they could probably have spend $100K or more converting the design
they could get rid of the handwired backplane... it must have been a lot of hours of work
the wiring on one of those boards would be another $500-1000 win
and the board material wasn't free either - just reducing the board from 3 square feet to 1 would have helped ;)
retraining all the service people would add up on the other side of the scale
I bet while they were building this in 76-78 they were working madly on a new design. I doubt it was either-or.
the bridgeport is from '83 and it's much (!) more modern
but I bet many companies didn't change until the competition forced them to
wtf - SWPadnos, the pen you gave me doesn't write well - I want my money back!
Parker refills :)
I noticed that some of the pens had a hard time starting - the paper type ended up being importnat (post-it notes didn't work so well, standard printer paper did ...)
this is a fascinating graph -- it shows different forecasts intel made of itanium sales over many years -- http://en.wikipedia.org/wiki/Image:Itanium_Sales_Forecasts_edit.png
they sure want exponential growth, don't they
they want a larger exponent
they must have been on drugs
[02:53:25] <cradek> http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=310072897834
* cradek notes that this control has four of the relatively rare 1101 ram chips in it
heh, you can make $400 right there!
those and the display tubes...
I might come out ahead :-)
amazingly all but one of the tubes is good
what kind of tube?
numitron (incandescent filament 7 segment)
only one of them has one segment out
[02:56:30] <skunkworks_> http://cgi.ebay.com/Intel-C1101A-1101-PMOS-Static-RAM-IC-Chip-RARE-4004_W0QQitemZ310072897834QQcmdZViewItem?_trksid=p3286.m20.l1116
I think the cosmac elf used one of these chips for its ram - people still want to build them. 1802 processors are still readily available, only the ram is hard to find.
[03:04:46] <LawrenceG> http://unicornelectronics.com/IC/STATIC.html
... interesting.... 5101 for 6.99
first ram I used was 2102 static rams
2716 2kx8 eproms, and the same size ram (don't recall the number tho)
with a Z-80
dunno about first, but I've burned a LOT of 2716s over several years that I was using F8s in projects
2k is sure a lot of (handwritten) machine code
I used to have 8 at a time in the eraser...
the complete northstar disk os fit in 2kx8
not the best way to debug a program :-)
hey I've played with northstar dos... but I think I booted it from floppy
the northstar didn't have a front panel - it used rom on the disk controller to bootstrap
jepler has changed the topic to: Welcome! EMC (Enhanced Machine Controller) is a linux-based opensource CNC control. | Latest release: EMC 2.2.5 | http://www.linuxcnc.org
are you making a release?
oh, I see it had been changed to something else - odd
what was it before?
04:11:46 [freenode] -ChanServ(ChanServ@services.)- [#emc] "This is the #emc channel - talk related to the Enhanced Machine Controller and general machining. Website: http://www.linuxcnc.org/,
wiki at http://wiki.linuxcnc.org/"
chris... i still have my Imsaii with front panel... converted to northstar with update on cpu board to 4mhz z80 and the boot rom/disk controller board
cool! we've got an imsai in the basement too ... repaired it in about '97 and I suppose it would work if I would go turn it on
I actually had it running fortran and a graphics display around 512x480.... big stuff
also has a z80 in it
this one has just a serial console, and we never managed to get cpm going on it. I think our floppy was bad or something. but got northstar dos working on it.
It would be very retro to make a front panel for todays computers....
* skunkworks_ 's computer experience only starts with the TI99/4a
the northstar os worked fine.... I built 3 disk drives mounted into an old heathkit radio cabinet!
If you need northstar disks, I may be able to help if I can still read them.... need to update the bios to support thumb drives!
we have (or had) northstar dos that works, don't have cp/m (it has been 10 years since we messed with it)
we had a lot of trouble finding hard sectored floppies iirc
no kidding..... an sd card would probably be possible to interface to..... save the old floppies
i had an 8"drive for a while, but the controller never worked reliably
support request for emc on imsaii?
Hello all. I have yet another few stg hal questions.
I have an issue with emc telling me to turn on the machine and take off estop. I believe i am not connected to the correct pins.
I believe the hal manual numbers them differently than the stg board manual
when i load the emc, i can trigger estop and hear my relays activate, but estop doesn't come off.
i'll come back tomarrow to pose the question.
Hi, I am working on new gui interface for the linuxcnc , I need some help regarding the NML.
archivist_ub: bid got cancelled \o/
look in the logs one of the guys showed his MDF cnc router a few days ago
I commented on it and his nick began with a c iirc
in here, right?
unfortunately I just shut down the other box where the pic was still in firefox
ah yes, i've considered making that one a while back
reasonably robust iirc
yep, and easilly made with only hand tools
the guy that designed that made the whole thing in his bedroom..
valid use of a bedroom
* fragalot ponders wether to go for JGRO or buildyourcnc..
well JGRO is more ajustable if it's off
so i'll go for that one,.. might cost me a bit more, but meh
1/4-20 x 43.50 what's the 1/4-20 in metric? :p (lead screw)
google is your friend -_-
but IRC is quicker (slow pc)
20 threads per inch
25.4/20 gives you the pitch
(and 1/4" diameter = 6.35mm)
use what you feel like and adjust the software to suit
k, ty :)
archivist_ub: yeah, just wanted to get an idea of the diameter of it
going to use trapezoid threads
1/4" is a bit spindly for me
i'll do 8mm
make that M12
* anonimasu_ has a cad day
it's like "DRAW IT NOW!"
I just downloaded brlcad for another play see how far they have got
does EMC have support for "anti-backlash" beeing handled by software? :p
backlash is bad news for servo systems
as mine is stepper and has backlash I make sure I drive the correct direction
yep, some software is capable of correcting for backlash tho
backslash is shit for any system servo or stepper.
mm, one of my sisters fish is swimming upside down and seems to be having trouble staying down :/
must have gas
hm.. 9 windows of alibre with different parts open -_-
tbh, I dont like the schematics that alibre makes
fragalot: yes, the [AXIS_#]BACKLASH configuration item activates emc's backlash compensation. On my stepper machine this is fairly effective to remove about 0.0055 inches of backlash from the X and Y axes. but still, the less backlash actually in the machine the better.
jepler: ofcourse, i was just wondering if it had it or not :)
fragalot: what schematics?
fragalot: are you talking about circuit boards?
anonimasu_: if you design something in alibre, you can make schematics with it
oh, that kind..
:p had my brain stuck in EE mode
what dont you like?
ofcourse alibre isnt solidworks.
but for the price :)
what it produces, it's missing vital things to make a good drawing, imho
autocad inventor does a better job, esp. as you can easilly ajust it in autocad later on
I hear catia is good too.
ugh inventer is worse than etch-a-sketch
never tried catia :/
dont compare apples and pears..
archivist_ub: xD it's just that you can edit it after in autocad, which is, imho, a very decent app
after using Solidworks, you might not say that
I'd like inventor or solidworks, but my budget isnt big enough :)
i've been using autocad for nearly 7 years now, so my opinion is def. biased :p
fragalot: well, I'm not too into 2d cad.. most of my stuff is like 3d stuff.. then make prodduction drawings in 2d
I also mainly do it directly in 2D, but 3D helps you spot problems faster
only downside is that you cant drive 3d off 2d in alibre like in solidworks.
I tried early autocrap, could never get on with it, Solidworks was a revelation
* anonimasu_ nods
[12:40:33] <anonimasu_> http://usa.autodesk.com/adsk/servlet/index?siteID=123112&id=8134613
is that right?
don't see why it would be wrong?
to produce good 2d drawings from 3d models it really requires a lot of understanding about the object -- off and on I've been reading a book on mechanical drafting from the 40s and I think it would take quite a long time for me to learn the skills well
jepler: it mainly requires good insight
hm, usually what I do to make production drawings is that I start with a anchor.. like a flat line..
then use that as reference for geometry
besides that, everyone has their own preferences about how certain things should be drawn; the program gets exponentially more complex compared to the number of options it gives the user
and specify it up enough to reproduce the whole part off just a drawing
what matters in the end is if the drawing is good enough to get produced by somebody that hasn't ever heard of the object before
* anonimasu_ nods
that's the point.. :)
I do 3d because of clearences like cylinders and stuff :)
I like the gearing in Solidworks rotaing and testing a gearbox/clock becomes a lot easier
inventor is $5195
anonimasu_: more like $1k isn't it
and 9166$ is what solidworks costs here
Autodesk® Inventor? Suite$1,095
that's the yearly subscription.
not the software
and solidowrks is about the same for mainentance
this laptop is too low spec :'(
maximizing a window pauzes music from playing for a while
ipod out of juice..
and I was on a good streak of tracks.
* archivist_ub uses the PC for music
no U@ for you!
lol, I were listening to music instructor
"All I Want Is You" is playing for me at the moment - great song
funky breakdance-ish stuff :)
hehe U2 is a battery size as well as a group name
I'm going to make a band and call it LR3
I'm going to get breakfast now
dinner and coffee here
well, you're in the ewwww-kay
btopenworld sounds UK-ish to me :)
and there we have it
mplayer crashed, byebye music
evil strikes back
toastyde1th: your website looks interesting but I can only load a page once in a great while. I have been trying yesterday and today.
what's the url?
[19:40:24] <cradek> http://toastydeath.5gbs.com
** server can't find toastydeath.5gbs.com: SERVFAIL
looks like a dns problem
ditto, cant find
it loaded once for me, earlier today
MyHDL aka PyHDL looks cool
[21:07:10] <skunkworks> http://www.electronicsam.com/images/KandT/servostart/boardfinal4.PNG
[21:07:29] <skunkworks> http://www.electronicsam.com/images/KandT/servostart/boardfinal4.PNG
skunkworks: what changed since 3?
[21:07:46] <skunkworks> http://www.electronicsam.com/images/KandT/servostart/schmfinal1.PNG
I added the option of putting a 10k in series with the comparator. (for a bit of protection)
now it is done.. ;)
you keep saying that
okay another dumb linux question, what key combination in X disables the mouse
it's alt+something, and then suddenly my mouse disappears and all i can do is shift desktops and smash keys till it comes back
huh I don't know of one
i think it's beryl freaking out
when i reinstall this week i am sticking to fluxbox