PCNC770 4th Axis w/ Clear Path Servo & PathPilot
03 Jun 2016 20:05 - 03 Jun 2016 20:06 #75465
by PCW
Replied by PCW on topic PCNC770 4th Axis w/ Clear Path Servo & PathPilot
Yeah, ALL the changes need to be made:
1. P = 1000
2. MAX_ERROR = 0
3. Fix thread order
4. Set reasonable FERROR and MIN_FERROR
limits say 0.1 and 0.01
and FF1 MUST be 1
1. P = 1000
2. MAX_ERROR = 0
3. Fix thread order
4. Set reasonable FERROR and MIN_FERROR
limits say 0.1 and 0.01
and FF1 MUST be 1
Last edit: 03 Jun 2016 20:06 by PCW.
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- charliebrumfield
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03 Jun 2016 23:16 #75473
by charliebrumfield
Replied by charliebrumfield on topic PCNC770 4th Axis w/ Clear Path Servo & PathPilot
current ini file a axis params
current hal file servo thread
just made a run with the above settings. i guess i inadvertently set ff1 = 0 at some point last night. that was causing the machine to error off. now the machine runs and the decell looks like its working right. but we're still getting a twisted part.
# PID tuning params
DEADBAND = 0
P = 1000
I = 0
D = 0
FF0 = 0
FF1 = 1
FF2 = 0.00011
BIAS = 0
MAX_OUTPUT = 0
MAX_ERROR = 0
SCALE = 200.0
FERROR = 0.1
MIN_FERROR = 0.01current hal file servo thread
########################################################################
# servo thread
addf hm2_5i25.0.read servo-thread
addf hm2_5i25.0.pet_watchdog servo-thread
addf motion-command-handler servo-thread
addf motion-controller servo-thread
addf estop-latch.0 servo-thread
addf toggle.0 servo-thread
addf prog-not-idle servo-thread
addf axis3-not-homing servo-thread
addf x-homing-not2 servo-thread
addf gearchange.0 servo-thread
addf probe-active-hi-lo servo-thread
addf debounce.0 servo-thread
addf pid.0.do-pid-calcs servo-thread
addf pid.1.do-pid-calcs servo-thread
addf pid.2.do-pid-calcs servo-thread
addf pid.3.do-pid-calcs servo-thread
addf tormachspindle servo-thread
addf enable-limit-x servo-thread
addf enable-limit-y servo-thread
addf enable-limit-z servo-thread
addf probe-enable-input servo-thread
addf door-limit-in servo-thread
addf y-axis-lim-sw-and2 servo-thread
addf door-limit-x-lut servo-thread
addf door-limit-y-lut servo-thread
addf hm2_5i25.0.write servo-thread
########################################################################just made a run with the above settings. i guess i inadvertently set ff1 = 0 at some point last night. that was causing the machine to error off. now the machine runs and the decell looks like its working right. but we're still getting a twisted part.
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03 Jun 2016 23:49 #75474
by PCW
Replied by PCW on topic PCNC770 4th Axis w/ Clear Path Servo & PathPilot
OK so you now know the stepgen is following the commanded position within .1 degree
( its probably doing much better ) So now we know the issue is elsewhere
Guesses:
scaling wrong
Interface step polarity wrong so a step is lost every reversal because the direction
hold time is violated
Step noise pickup
Mechanical problems
( its probably doing much better ) So now we know the issue is elsewhere
Guesses:
scaling wrong
Interface step polarity wrong so a step is lost every reversal because the direction
hold time is violated
Step noise pickup
Mechanical problems
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06 Jun 2016 21:17 #75587
by charliebrumfield
Replied by charliebrumfield on topic PCNC770 4th Axis w/ Clear Path Servo & PathPilot
ok turns out i'm an idiot. when I wired the step and direction signals I botched the direction signal. didn't catch it because we only spin the axis in one direction. turns out it would only spin in one direction. fixed that issues and all is running correctly now. though you MUST have the .ini setup as previously discussed on this page. tormachs default PID settings lead to decell issues with the clear path servos.
many thanks to yall for helping me sort this out.
many thanks to yall for helping me sort this out.
The following user(s) said Thank You: Cheech
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06 Jun 2016 21:39 #75591
by andypugh
Thanks for telling us what the problem was. Too often folk either say nowt or come back with a "fixed now". We can all now (you included) have this possibility in mind next time we see something like this here.
Replied by andypugh on topic PCNC770 4th Axis w/ Clear Path Servo & PathPilot
ok turns out i'm an idiot. when I wired the step and direction signals I botched the direction signal. didn't catch it because we only spin the axis in one direction. turns out it would only spin in one direction.
Thanks for telling us what the problem was. Too often folk either say nowt or come back with a "fixed now". We can all now (you included) have this possibility in mind next time we see something like this here.
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08 Jun 2016 12:24 #75683
by charliebrumfield
Replied by charliebrumfield on topic PCNC770 4th Axis w/ Clear Path Servo & PathPilot
oh one other thing, you can not flip the axis direction using the clear path settings as that will also cause an interpolation error.
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08 Jun 2016 12:25 #75684
by charliebrumfield
Replied by charliebrumfield on topic PCNC770 4th Axis w/ Clear Path Servo & PathPilot
yup. comes from my coding days. I always try to post the solution so that someone else can hopefully find a use for it later.
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09 Jun 2016 10:44 #75714
by cncbasher
Replied by cncbasher on topic PCNC770 4th Axis w/ Clear Path Servo & PathPilot
thanks for posting , and glad you found it in the end
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04 Nov 2016 15:10 #82428
by TT350
Replied by TT350 on topic PCNC770 4th Axis w/ Clear Path Servo & PathPilot
I would like to do this upgrade as well. Do you mind posting the Clear Path motor part#?
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