Layer Shifts at same height
Hi Guys.
I have a weird problem.
After upgrading my MK2S to the MK2.5 I have had some layer shifts. The first directly with the first print (needed to reprint the Rambo Case...)
Everytime on the same height I got a layer shift - but only on the Y-axis. I tried everything. Checked the belt on the Y-axis, checked if the filament sensor is maybe causing the problem. Checked if the SD Card could be the problem.
At some point the print came out ok and without a layer shift. Then I had no shifts for some time till now.
For the attached GCode file (the motor cover of Daniel Norées OpenRC F1 car) I had layer shifts - every single print on the same height.
Again I tried everything (this time except the SD Card check) and nothing worked (my belts are at a good tension!).
So it got me thinking. Maybe there is a little calculation error in the firmware (I now that floating point calculation or calculations in general on an 8-bit microcontroller are not easy). I remember that with the MK3 there were more layer shift problems than with the MK2.
So I tried the newest firmware (3.1.4) for the MK2.5 - but it didn't help.
So yesterday I downgraded back to the MK2S and calibrated it. And the print with the same GCode file worked flaweless!
As the only change in the mechanics of the Y-axis was to replace the bed (didn't touch the belt!) I think that my assumption of a bug in the firmware might be correct. But I'm not sure enough to file an issue.
Maybe some of you guys (with a MK2.5 or maybe MK3) could testprint attached GCode file and post their results here?
Would be nice so we together can track down the bug.
Greetings
Christoph
P.S.:
Only thing I didn't tested was to move the object on the platter. Maybe that was the solution for the first layer shift problem I had.
Re: Layer Shifts at same height
I realize the post is almost a year old now but did you ever solve this? I'm having the exact same problem and pulling my hair out over it. I'm nearly at the point of buying a new rambo and power supply to see if that fixes anything as all the tuning, lubing and tension adjustments haven't seem to do anything for it.
Y-Axis shifts at the same height almost every time.
Did you solve your shifting problems? I just upgraded an MK2S to MK2.5S and I'm seeing the same issue. It's driving me nuts.
RE: Layer Shifts at same height
Did any of you guys ever solve this? Late to the party with the same issue.
RE: Layer Shifts at same height
Same issue here, and I see there are NO answers even though the original post was from 2019. I'm printing out a series of parts for the ZenXY Sand Table, and everything worked fine for the first 10 prints. Then, I started experiencing a layer shift at the same height on every print. Nothing changed; I've been printing part after part. Prusa MK3, latest firmware, latest PrusaSlicr. PETG filament.
RE: Layer Shifts at same height
I had a similar issue about a year ago, in where all my prints got quite a large shift after about 2cm of printing (consistent z-height each print).
It might not be the same issue, but in my case I found the culprit to be the "silence mode" or whatever it is called on the device (stepper motors are more quiet but do not track their actual position). With a bit of luck this may be the issue for you as well?