In order to find out why my printer sometimes skips Y-steps (always in the same direction) only in Ultimaker Cura, I am digging into the G-code to understand the problem better. However, thousands of lines of G-code are hard to analyze.

I am using a Mk2 heatbed with a glass sheet, and a NEMA17 motor in a P3Steel Toolson Edition printer. The axis feels reasonably easygoing in both directions.

Reducing the acceleration to 4000 did not get rid of the problem completely - it might have relieved the issue, though. I didn't do quantifiable tests, sorry.

Are there any other obvious things I might have missed? I know the acceleration might still be rather high, but since it works with Slic3r easily I would like to take advantage of some features in Ultimaker Cura with this printing speed.

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    $\begingroup$ Just to clarify, you never get Y-axis skips when using Slic3r? So, it is definitely a software issue? Otherwise it might be that the stepper motor driver for the Y-axis is providing too much (or too little) current... $\endgroup$ – Greenonline May 9 '17 at 6:22
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    $\begingroup$ Yes, of course, increasing the maximum supplied current to the motor gets rid of the issue. Still, I'd rather go with lower current to limit heating up the motors. I was just wondering if there is something in the two slicing engines that makes cura provoke much harsher movements that cause the printer to lose steps... $\endgroup$ – kamuro May 21 '17 at 21:22
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    $\begingroup$ Skipping steps means the current to the motor is insufficient for the required motor torque. Principle driver of torque in a 3D printer is acceleration. You could compare the GCode to see what is being set in the M201-M204 commands. $\endgroup$ – markshancock Jul 2 '17 at 6:23
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    $\begingroup$ Assuming you set the same acceleration in both Cura and Slic3r, are you sure they are applied correctly in the gcode file? In the case that the software does not output the correct gcode to set the acceleration, then the default values already set in firmware are applied. $\endgroup$ – Demetris Aug 1 '17 at 7:12
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    $\begingroup$ Is the same infill pattern being used? Some infill patterns stress the acceleration much more than others. $\endgroup$ – cmm Aug 30 '17 at 18:44

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