Joint speed tracking - motion in danger

  • endian
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23 Jun 2026 17:56 #347280 by endian
hello gentelmen,

Does somebody have time to help me tested some behaviour of the actual trajectory planner(trapeziodal)? maybe there is bug in the TP and I need more independent observations ... 

Its just regular simulation setup with some precise steps to replicate ... the post the picture of the watched scope please

I need help from you please...

If you are ready, create axis.ini sim OR sim axis_mm.ini trivkins simulation UI ... then
  • Start Lcnc
  • Enable
  • home all
  • hal scope
  • observation time as long as possible but period is fine 40ms
  • add joint.0.vel-cmd.. scale 20
  • add joint.1.vel-cmd.. scale 20
  • split them to they own space
  • Load Gcode program(from attachements but watched behaviour is present everywhere)
  • hit play button alias program run
  • observations the spline created by gcode (nice smooth steady - the first one)
  • wait program end OR stop program by program stop/stop radio button
  • break point 1(only for repeat command)
  • return home G28 or rehome everything
  • I press start button again at same code no change, no position change nothing just return to row 1 of gcode
  • start program with play radio button
  • observations the spline created by gcode (clingy - every other)
  • wait program end OR stop program by program stop/stop radio button
  • go to breakpoint 1(only for repeat command)

Please paste your scopes ... I hope your velocity splines will be exact same at rerun the gcode!!!

My scope is at rerun different each time ... 

many thanks


 
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