SergioBA

Please, read my first post. Motors are cool, drivers has fan, pulleys and belts are OK. If I try to force Y and X axis by hand when printing I have to apply a huge amount of force for it to skip steps.

Everything you say is reasonable, but my jerks and speeds are really conservative. Both of my 2 ender 3 run DUET 2 motherboards, so I wouldn't blame the firmware or electronics. The other ones run custom marlin. Mi newest printer is the Artillery X1 and it happens almost since de first day. My question is why it started to happen this year, in all printers, when I had been printing for 3 years without changing the firmware or slicing settings and never had a problem. I even use jerk/acceleration control with really low values. As I said before, slicing again the same file exactly the same way fixes the problem. As an example, I printed the same gcode 4 times, getting the exact same layer shift the 4 times. Then re-sliced it and printed 100 face shields without a single problem, non stop.

Hi. I've been experiencing this issue since January. I use cura since 2.x version (about 3 years), and never had a layer shift before this year. I have 5 printers (ender3, custom prusa steel, anet a8, artillery X1) and I have checked pulleys, belts, motor vref, etc. Everything seems OK. In about 3 years 3D printing never had a layer shift before, not even when I got my first printer, the Anet A8. And now all of my 5 printers suffer this problem. The problem has been increasing since January. Everytime I slice a STL, there's a big chance of getting layer shifts, which are not visible in the preview. If I print that gcode again, it will happen exactly the same a hundred times. Then I re-slice it and usually the problem is solved I'm a 100% sure it's a slicing problem. If the gcode is "good" it wil never fail, when the exact same model with the exact same settings failed before. It has been tested with the hundreds and hundreds of face shields I recently printed for the Covid-19 situation. This is driving me crazy, any solution known? Thank you in advance.