Hello all!
I am rather new to CNC's, but have spent the last few months obsessively reading and upgrading my 50w Trocen controlled chinese blue machine 500x300mm.
The problem I am running into is that my machine is becoming very inaccurate along the y axis. when I cut a series of slots or holes moving down the y axis, the spacing becomes progressively inaccurate. as the job progresses, even the slots themselves do not end up where they began, as if the cutting head moves up less than it moved down. if I cut circular dials, the central holes become more and more off center. I have already spent a long time with laser alignment, and gantry squaring and it doesnt appear to be that. it is accurate at the beginning of a job, and becomes progressively worse, as if every time it tries to return to a given Y position it doesnt quite get there. I will attach some photos to show what I mean.(the photos are all rotated , not sure why. the gap in the circles is along the y axis) Raster engrave seems to work just fine, although there seem to be more pronounced ridges. Is this a stepper motor problem? thanks everyone.