Additional gcode trajectory drawing on gremlin

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7 years 9 months ago #125228 by Nico2017
Additional gcode trajectory drawing on gremlin was created by Nico2017
Hi,
I was wondering if it was possible to display a Gcode trajectory on gremlin without actually loading it.
Ideally I have a gcode file achieving a trajectory but I would like to visualize at the same time another gcode file on the same gremlin window, to be able to do a live comparison while using the machine. For instance I would like to know if my current trajectory is inside or outside another one done previously on a different file, while I am using the machine.

Was thinking to either:
  • include the trajectory on a subroutine file called by my gcode, but I want to make sure that the additional trajectory is actually not going to be executed, so I could actually add a if condition which is going to change to False while my main code is working
  • add a background image loaded in gremlin but not sure if it is possible and this may imply a lot of work to set up correctly the positioning
  • somehow in glade VCP having two gremlin instance either overlaying or side by side, and synchronized. However I am wondering which file is going to be run when I am using the .gremlin.load(".../nc_files/*.ngc")

Any idea or comment would be appreciated.

Thank you,

Nicolas

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7 years 9 months ago #125237 by andypugh
Replied by andypugh on topic Additional gcode trajectory drawing on gremlin
It seems that it should be possible. The "stand alone interpreter" might be one part of the puzzle, as I think that Gremlin only accepts canonical commands.

github.com/LinuxCNC/linuxcnc/tree/master/src/emc/sai

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7 years 8 months ago #127066 by nkp
Replied by nkp on topic Additional gcode trajectory drawing on gremlin
The second file can be loaded as follows:

in axis(.py)
Code:
........... ......... else: unitcode = '' try: result, seq = o.load_preview(f, canon, unitcode, initcode, interpname) except KeyboardInterrupt: result, seq = 0, 0 try: f1 = "/home/nkp/linuxcnc-HBM/build/nc_files/cds.ngc" #XXX nkp result, seq = o.load_preview(f1, canon, unitcode, initcode, interpname) #XXX nkp except KeyboardInterrupt: pass # According to the documentation, MIN_ERROR is the largest value that is # not an error. Crazy though that sounds... if result > gcode.MIN_ERROR: .............. ............

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