Layer Shift Problem
I have a weird layer shift problem affecting multiple models out of multiple slicers.
As shown in the picture, at a height of about 6mm off the build plate (for this model), the layers start progressively shifting approximately equally in both x and y, from x min and y min toward x max and y max.
This has also happened on Benchy models (about 3 mm off the bed) and a different model of functional parts (large flat model just a few layers off the bed.) Its the same shift in the same direction.
There is no movement of the build surface. I don't hear any change in the movements when listening.
I recently installed the IDEX upgrade kit. This is currently happening only with T0. I included a pic of my first 2 color benchy only to show that it did not shift after installation of the kit.
0.6 mm nozzles in both toolheads. Otherwise stock. I checked the grub screws in the pulleys and they're tight. I don't understand on the IDEX motion system how I'm getting a shift in both x and y.
Any troubleshooting ideas would be greatly appreciated 🤔 .
Any troubleshooting ideas would be greatly appreciated 🤔 .
4 Replies
Interesting update. I have run through the relevant parts of the commissioning guide again. I've also run through the IDEX commissioning guide again.
It was consistnently happening on that model at about 6.5 mm. I did increase z-hop and it didn't change.
Then I turned off performance mode and ... it got much worse!!!
I dunno. At this point I'm out of ideas for today. I've been messing with it most of the day. Good news is that I feel good about my Beacon calibration and my mesh calibration.
I've been debating how tight the belts should be, but I seem to have reasonable input shaper curves.
One last try tonite. I tried printing with T1 instead. Same problem in the same direction.
Kinda sounds like a weak/broken motor, but its strange that it always happens at the same height
Thanks. The motors sound fine and I agree, I started thinking maybe a driver was overheating or something. But I am now leaning toward loose belts and skipping teeth. I watched it happened and it starts with a ‘big’ travel move in the opposite direction of the infill line it just laid down. Kind of like excessive jerk. It’s a diagonal move which may be why the shift is diagonal as well.
Also weird that it happens to both tools. Seems like it would need to be Y in that case. Could be missed steps in Y, but unless they’re exactly equal I don’t understand why it wouldn’t start to affect the gantry.
My X belts are a LOT looser than the hybrid belts. So maybe time to venture there.