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Backlash Compensation: Test and gcode Compensation Program
par SteakSndwich
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tldr; Backlash Test i made and a program to get rid of it when slicer, firmware and printer won't do the job. USE AT YOUR OWN RISK
Uneven circles, crappy Infill and gaps between walls. Thats what i dealt with.
After some time i realised: My printer suffers from Backlash (when the direction of an axis changes, the movement of the stepper isn't transfered to the nozzle directly and it loses some movement).
This caused that, when the angle of return on a 100% infill was "proper", the nozzle would extrude over the same line twice, then "skip" the next one. Circles didn't have uniform diameters and walls didn't bond in specific angles which caused airgaps.
There are already some good backlash tests here (i first used: thing:2256550 )
But when tightening all belts, pulleys and steppers won't help anymore, there has to be another option. Cura and marlin don't have the answer afaik so i looked out for another option: altering the gcode itself.
thing:979377 already tried this. But
Uneven circles, crappy Infill and gaps between walls. Thats what i dealt with.
After some time i realised: My printer suffers from Backlash (when the direction of an axis changes, the movement of the stepper isn't transfered to the nozzle directly and it loses some movement).
This caused that, when the angle of return on a 100% infill was "proper", the nozzle would extrude over the same line twice, then "skip" the next one. Circles didn't have uniform diameters and walls didn't bond in specific angles which caused airgaps.
There are already some good backlash tests here (i first used: thing:2256550 )
But when tightening all belts, pulleys and steppers won't help anymore, there has to be another option. Cura and marlin don't have the answer afaik so i looked out for another option: altering the gcode itself.
thing:979377 already tried this. But
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