This is GRBL-related. I have a laser-engraver type machine, Chinese, ~55 cm X axis, aluminium extrusions, 2mm-pitch T belt, Nema 17H3430 motors, one mechanical homing switch for X, Arduino-based.The X-axis accuracy is not up to par. When I make a mark on the X axis and jog to that mark (after homing), depending on the day, the position varies within ~4mm or so from G00 X-418 to G00 X-422. I checked the belt tension, it is seems OK, not too tight, not too lose. Is there something else I should check? Another idea I have: put a homing switch on the other end of the X-axis, then home both ends of the X axis, measuring the difference in machine position, then modify the steps/mm value for each session to force to command that puts me on the mark to be constant (e.g. G00 X-420). Any other ideas? Thanks.
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Joined: Sun. Mar 17, 2019
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Last Edited: Mon. Oct 21, 2019 - 01:58 PM