MK4 Layer Shifting in X and Y on Proven Gcode ran on MK3
Having layer shifting across 10 MK4s on gcodes that have successfully printed 100s of times on my MK3 farm. I have checked the tightness across all screws on the printers and adjusted belt tension with a belt tension model. Shifting seems to be happening in spots you'd expect, over infill and over curling overhangs. I am trying to avoid changing 100s of gcodes for that though as the MK3s seemed to handle how they were sliced just fine. It just seems like the MK4 is way more sensitive to shifting then the MK3 was for me.
Looking for any suggestions on things to check.
Thanks!!
RE:
I don't know if you should expect GCODE sliced for one machine profile to run EXACTLY the same on another machine. Even if they are the MK3 and MK4 (same brand, but different hardware characteristics.
That's my humble opinion.
RE: MK4 Layer Shifting in X and Y on Proven Gcode ran on MK3
Having layer shifting across 10 MK4s on gcodes that have successfully printed 100s of times on my MK3 farm. I have checked the tightness across all screws on the printers and adjusted belt tension with a belt tension model. Shifting seems to be happening in spots you'd expect, over infill and over curling overhangs. I am trying to avoid changing 100s of gcodes for that though as the MK3s seemed to handle how they were sliced just fine. It just seems like the MK4 is way more sensitive to shifting then the MK3 was for me.
Looking for any suggestions on things to check.
I don't have an MK4 yet myself, but you are using at least firmware 4.6.1, yes? And while 4.6.1 adds support for MK3 gcode, it's quite possible that support is buggy. Gcode is normally something that's very machine specific. Have you tried taking one of the models that's having issues, re-slicing it for the MK4, and trying to print? If one sliced for MK4 doesn't have issues, then the issue would seem the MK3 gcode support, and not a printer issue. If the MK4 sliced gcode still has issues, then it's something related to the MK4, and not the MK3 gcode support.
I don't know if you should expect GCODE sliced for one machine profile to run EXACTLY the same on another machine. Even if they are the MK3 and MK4 (same brand, but different hardware characteristics.
That's my humble opinion.
Normally, yes, but Prusa added support for the MK4 to run MK3 gcode in the 4.6.1 firmware update. I suspect it may be buggy though. Seems like a somewhat difficult thing to make sure you catch all the possible things that could go wrong.
RE: MK4 Layer Shifting in X and Y on Proven Gcode ran on MK3
Thanks for the responses. Before the backwards compatibility was offered I had re-sliced my most popular gcode to capture the MK4 specific settings. I kept infill modifiers, support material, variable layer heights, etc the same as what I was running on my MK3s.
Whether it's sliced with MK4 settings or running in MK3 compatibility mode I seem to continue to get the issue.
All machines are running 4.6.2 firmware and same things seemed to continue happening across the last 2 firmwares.
Pulling my hair out trying to figure out why it would be more prone to shifting. When I went through the whole printer and tightened anything tied to motion and tightened the belts to be on the tighter side of calibration there may have been a small noticeable improvement but still having issues. Had to cancel changing my farm over until I can figure it out.
RE: MK4 Layer Shifting in X and Y on Proven Gcode ran on MK3
Just to be sure, you'r not using the usb drive they sent you right ?
I ask that because I've just seen the last video from Uncle Jessy end he said the usb drive generate errors in prints.
RE: MK4 Layer Shifting in X and Y on Proven Gcode ran on MK3
I never considered that but you might be on to something. I use a mix of drives. I’ll start tracking that. Thanks!
Just to be sure, you'r not using the usb drive they sent you right ?
I ask that because I've just seen the last video from Uncle Jessy end he said the usb drive generate errors in prints.
RE: MK4 Layer Shifting in X and Y on Proven Gcode ran on MK3
turn of crash detection ?
RE: MK4 Layer Shifting in X and Y on Proven Gcode ran on MK3
I received a new fully assembled MK4 one month ago. Probably ran 15-20 prints total during this period. Now getting severe layer shifting in the x-axis direction. Turns out the x-axis pulley is slipping on the stepper motor shaft. When I tried to re-align the pulley could only tighten one of the two set screws. The other set screws hex hole is deformed and cannot insert an Allen wrench. The assembler for this unit could not have tightened the set screw. PRUSA is sending me a new replacement pulley.
Possibly your layer shifting problem is loose belt, and-or pulley?
RE: MK4 Layer Shifting in X and Y on Proven Gcode ran on MK3
I'm getting layer shift in Y from printing direct from the USB stick.