Tronxy X5S losing steps during print This is my first printer, a core xy (Tronxy X5S) printer, and it is losing steps during diagonal movements. The curious thing its that fail is even, I've printed 2 calibration cubes and they are almost equals:



When it lose the step, you can ear a "toc" sound, as in this footage at 3s: https://youtu.be/aRJB--QBMC4 This is my realy first print, and I don't have much experience with 3d printing, thanks in advance for any information!
I had the same issue with my X5S when I first got it assembled. Because it's CoreXY, if one pulley slips, you'll skip steps in the diagonal. Check both set screws on your pulleys for the X and Y.