IHSS60-36-30 motor tuning/issues

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4 years 3 months ago #248308 by ddB0515
Hello

I have question regarding motor tuning, did go trough numerous threads how to tune motors but didn't get too much information for it (due to different motor types)

I have same setup for all 3 axis/motors (IHSS60-36-30) (here is INI for one of them)
Code:
#****************************************** [AXIS_X] MAX_VELOCITY = 166.666666667 MAX_ACCELERATION = 1000 MIN_LIMIT = -0.01 MAX_LIMIT = 500 [JOINT_0] TYPE = LINEAR HOME = 0.0 FERROR = 10.0 MIN_FERROR = 1.0 MAX_VELOCITY = 166.666666667 MAX_ACCELERATION = 1000.0 # The values below should be 25% larger than MAX_VELOCITY and MAX_ACCELERATION # If using BACKLASH compensation STEPGEN_MAXACCEL should be 100% larger. STEPGEN_MAXVEL = 180 STEPGEN_MAXACCEL = 1500.000 # these are in nanoseconds DIRSETUP   = 3000 DIRHOLD    = 3000 STEPLEN    = 3000 STEPSPACE  = 3000 STEP_SCALE = 640.0 # Homing Setup  MIN_LIMIT = -0.01 MAX_LIMIT = 500 HOME_OFFSET = -0.500 HOME_SEARCH_VEL = -10.000 HOME_LATCH_VEL = 0.500 ### HOME_SEARCH_VEL = 0 ### HOME_LATCH_VEL = 0 HOME_FINAL_VEL = 0.500 HOME_USE_INDEX = NO HOME_SEQUENCE = 1 HOME_IGNORE_LIMITS = YES #******************************************

Motor switches are set to micro stepping 3200 (SW1-4) JMC manual  page 12
SW1  -  OFF
SW2  -  OFF
SW3  -  ON
SW4  -  ON
SW5  -  ON    (this was recommended to be ON)
SW6  -  OFF   (CW/CCW)

I have ordered dial indicator that can do 1inch for testing but till then I' looking how to improve this as much as I can

If you take a look on image
 
This is current values from milled example, RED values are measured via kaliper 
Big circles should be 20mm but measured are 18.88mm
Small circle in left corner should be 10mm but is 8.88mm
And square should be 30mm but it is 28.88mm

Not sure if this is step slipping or something else so any suggestion is more then welcome :)

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4 years 3 months ago #248324 by tommylight

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4 years 3 months ago #248332 by ddB0515
I have checked Gcode and didn't find any G41/42 in so I don't think so that is the case :(

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4 years 3 months ago #248347 by Todd Zuercher
Backlash?

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4 years 3 months ago #248350 by ddB0515
Was thinking the same but even if I push hard head in XY direction with dial I have (0.01mm/range 1mm) moves for a max 0.1 so that is not likely that is the problem :(

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4 years 3 months ago #248352 by tommylight

 
Big circles should be 20mm but measured are 18.88mm
Small circle in left corner should be 10mm but is 8.88mm
And square should be 30mm but it is 28.88mm
Did you check for tool compensation in LinuxCNC and in CAM software.
Screenshot of the path in LinuxCNC? What dimensions does it show there?
Pictures of the cut part?

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