so the other way around from how I pictured it?
I'm not sure you're allowed to have HOME_OFFSET outside your working range
the experiance I got was joint 1 on limit switch error
try home_offset=0, home=-.025
same experiance as before joint 1 on limit switch ie. it went the wrong way
hrmm.. prod jmkasunich ;)
-Y moves toward the switch and +Y moves away when jogging
huh, wha? me?
BigJohnT_: then somethings set up in reverse
get jogging directions working right before you even think about homing
can you describe the axis?
left far travel is -50, right far travel is 0
jog y- should move left
jog y+ should move right
this is Y so away from front is + and toward the front is -
you are moving tool, not work, right?
ok.. so forwardmost is -50
and the switch is backward most?
jmkasunich: I am moving in the correct direction for Y yes?
so jog y- is moving to front?
01:59 < BigJohnT_> -Y moves toward the switch and +Y moves away when jogging
that was backwards
-y is close to you, +y is away, where is the switch? near or far?
ok, so that means its plus
search vel must be +
and latch vel is +
latch vel can be - or +, your choice
it is +
what are your limits?
your choices are:
+50 far from you, and zero near
ok, -50 is near you, far away is +0.25
is the switch location supposed to be 0?
the home offset is 0.25
is the switch location supposed to be 0?
no it would be .25
ok, so that is a limit switch as well as a home?
min = -50
max = .25
home_offset = .25
home = 0
that is what I have
latch and search vel = +
that should work - goes away from you, hits switch, backs off, goes to switch slower, hits it again, then rapids back 1/4" and stops
are you sure that it's off the switch at 0.25 - 1/4" ?
you'll need to have IGNORE_LIMITS set, since your switch is not inside the limits
jmkasunich: let me check that
and you have to home one at a time
home ignore limits = yes, but even though I only seleced on axis with a home switch home_sequence= 2
BigJohnT_: if you only home Y, it shouldn't matter
(the home_sequence is when you hit home-all)
ok, I'm just using a stepconf generated one at the moment
I commented it out and it didn't not make a difference
so it did make a difference?
didn't not ;-)
* alex_joni grins
did not, fingers faster than brain today LOL
I used a 0.25 back move on the Smithy machines. Works fine with both prox and microswitches.
rayh: the switch seems to work well... http://i47.photobucket.com/albums/f163/johnplctech/Plasma%20Cutter/Plasma006.jpg
well.. I really gotta sleep
work tomorrow.. :/
good night alex
Got a look at this in the latest portable mag. http://www.versalogic.com/Products/DS.asp?ProductID=187
I'll have to call em and see about price.
jmkasunich: I was stalling my stepper out but didn't see it till I increased the distance. I put a lower power resistor in just to test and it bites me on the ass
so until I can get by the resistor store I'll have to set my MAX_ACCELERATION way down to 100
sorry about the wild goose chase
steve_stallings is now known as steves_logging
on the Axis gui, the axis are labeled 0, 1 , 2, ... On some controls this is the way the control thinks, but there is a file or params to equate 0=A 1=Z 2=B whatever the integrator likes
no, the joints are numbered; axes have letter names like you say
tomp: the axes will be 0,1,2 if you are in joint mode
for trivial kinematics you should never see 0,1,2
hmm, i thought i set trivkins
frnn: u right, i got 5axiskins :) (hey thats hard to say!)
workin on this 'fixed bed' visualization http://imagebin.org/14309,
it moves now
before it had a cylinder under the head - where'd that go?
vismach is fun
fenn: the cyclinder was an A axis for an odd job, i had probs with it, so removed it to get the damn thing to move
wicked the vismach is doing circlular interp now, you guys rule!
i gotta figure out that vnc server stuff so i can capture gl movies
hah, when i was joining the assemblies together, i ended up with the X saddle and had to put it on the big pedestal , so it's the 'horse' of course
and G17 18 19 loop d loops wheeee
tomp: i havent tried it but pointing LD_LIBRARY_PATH to libmesa should work with xvidcap
it seems too ignore G19 circular interp ( F100 , G91, G2 Y0 Z0 J0 K50)
fenn: yeh i should try that thx
try that ( giddy form the vismach stuff )
does G19 work? emc2 doesnt complain but doesnt move, run from terminal & no info printed
gah that damn emc1 handbook always shows up first in google results
grumble dee dum
g19 works for me (it goes out of bounds though and emc doesnt complain
[05:08:04] <fenn> http://fennetic.net/pub/irc/g19-bounds.png
g2 Y Z J K ? could you try G91, G2 Y0 Z0 J0 K1? Should be in bounds with any luck, should be a full circle
no need, i see your's works
hmm if i just try to do a g17 arc it doesn't move
hurr how do i get "issuing circular move (blah blah blah)"
oh it never gets that far
just this: Issuing EMC_TASK_PLAN_EXECUTE -- (+509,+268, +19,g2\032y0\032z0\032j0\032i5,)
emcTaskPlanExecute(g2 y0 z0 j0 i5) returned 0
i got mine to move,,, i kept trying g91 and no luck, then tried g90, it worked, then said aha, then tried g91 again, it still worked & i said huh?
i wonder if this bug depends on a certain range of values for 'small'
my radii have been big, 100 200 50 units
my position.txt shows: 5.00000000979206050 0.00000002735994009 0.00000000164264760
totally unaware of position.txt
gonna restart emc to see reproducabillity
its in the same dir as your config file
in ~/emc2-trunk/configs/4from4gui i have no position.txt , and do have .ini .var .hal ,tbl & emc.nml .and btw, well, G19 works outta the box now
fenn: thx I gotta crash, goin on midnite & i haven't stood up all day , bye 4 now
someone send a fire truck
nope it wasnt the position file..
hard time reproducing this bug
I am interested in pid controll. What is the maximum output pwm frequency and maximum input encoder frequency?
alex_joni: you around?
interesting thing about last nights "problem" is with the reduced current on my new drive (I didn't have the proper resistor on hand) It would do a G0 without stalling but would not come off the home switch
make any sense?
once I slowed the acceleration down to 1/3 of what it was it would move off the home switch as I expected...
Does anybody know what is the maximum output pwm frequency and maximum input encoder frequency?
I think that depends on the latency of your computer...
mumu: usually with a parport control you can get 30-50kHz max if you're lucky
but if you use special hardware, then you can go up to 100-200kHz at least
although PWM doesn't make sense at more than 100kHz afaik
would it be possible to move the pid component (or others) to external hardvare (fpga). How can i solve the data exchange in this case (all component signals are float type)?
mumu: how fast PID do you need?
i would like to controll galvos (dont actualy know how fast it should be). What speed is emc capable of?
mumu: regular emc2 applications involve 1-2kHz servo period
galvos = hydraulic servo valves?
for laser usually.. of I read the web right
[13:11:37] <alex_joni> http://22.214.171.124:81/FriendGalvos.htm
[13:12:19] <JymmmEMC> http://en.wikipedia.org/wiki/Galvanometer
galvo=gavanometer...used to controll mirrors for laser show
eric_U: You remember the old voltmeters with a needle on them?
eric_U: Just replace the needle with a mirror and that's basically what a galvo is
actually, it is the same as a hydraulic servo valve
just missing all the oil all over the floor
alex_joni: I'm just not seeming how they're getting two axises from those photos
ones output sin
ones output points at second at right angles
[13:24:48] <alex_joni> http://126.96.36.199:81/images/Friends/Dnst/1.JPG
pressed return early
JymmmEMC: 2 "motors", each with a mirror
[13:25:23] <alex_joni> http://188.8.131.52:81/images/Friends/LasermanMatthias/10.jpg
alex_joni: I saw that one, but the nicer looking ones below that
slightly better pic
jepler: you have two galvos..
alex_joni: I'm still not seeing how... that last pic looks like it's attached to the mirror in both axis which wouldn't move at all
one for x and one for y..
one that swings in the X axis and one that swings in the Y axis..
JymmmEMC: get that?
anonimasu I get it, but I'm not seeing it in any of the nicer photos on that page
ok, off to work... laters.
there are comercial ones that are really really cute
ebay "SCANPRO30, 30k Scanner Galvo Laser Show DPSS Argon" laser, 2 amps, 2 galvos, draw pix on wall by redirecting with galvos, capable of scanning the ILDA test pattern at and above 30kpps.
manual ==> http://www.lasershowparts.com/files/Manuals/SCANPRO/SCANPRO30_40.pdf
this paper shows an analog feedback and twin analog drive signal per galvo http://ocw.mit.edu/NR/rdonlyres/65B85BDA-91B7-4975-AD7D-9A18CEE17358/0/scanner06.pdf
Norms Homade Laser show... some l298's? for running galvos? http://184.108.40.206:81/
it would be cool for an emc controlled galvo, but 15 to 30k steps/sec is pretty fast, dunno if angle feedback is just to hardware or back to control computer
same site has a series of pix of a 'bundt pan' mold, wire frame but clipped, animating it with g-thumb shows a pretty nice display of 'cad'. hmm, a wall projected cnc display?
* BigJohnT is caught up to last Friday, got all the bills paid...
micges: you get your park button figured out?
so little time..
I know what you mean
BigJohnT: I have already park button but want do this more oficcally :)
what do you mean?
btw it is spelled officially
I have modified axis so I have park button
but Its done quick'n'dirty
and when interpreter behave different in newest versions of EMC
my moves also behave different
that's not good
so I search better way
did you look into the pyVCP and Hal way?
I dont understand pyvcp way
and I newer think of hal way
the pyvcp will make a control panel for you that you can have extra buttons etc
lots of good info here http://www.linuxcnc.org/docview/html//hal_vcp.html
then you can link a button on your pyvcp to a hal component
hello. how to do dxf to g code
You need a CAM program.
to read the dxf, as questions about tools, material and create the gcode.
i want to do dxf to g code in ubuntu like to (image to gcode). image to gcode program inculded in ubuntu life cd
anyone wanna live in a giant snail? http://dvice.com/archives/2008/02/fantastic_nauti.php
Fenn thats interesting to say the least. I like the stained glass wall http://dvice.com/galleries/nautilushouse/nautilus4.jpg
i'd like to see the look on the zoning board's faces when they see the cad drawings
though i suppose technically it could be a greenhouse
Here's a crazy little place to the northeast of myself.
[23:44:42] <SkinnypuppY34> http://www.pasaquan.com
reminds me of a tibetan putt putt course
Yeah it was a bit ecclectic for me but neat since it is in my state.