Layer shifts/clunking after 3.2H upgrade
Hey folks,
I've had my RR 3.1 running great for years with a few minor upgrades; I was running stock + EBB42 toolhead board and dual (extrusion-less) linear rail. It's been rock solid.
Recently a stepper motor died on me so I decided to upgrade to 3.2H since it came out recently. I switched from EVA to the RR toolhead with beacon and went back to using the original 2020 extrusion gantry (as the extrusion-less upgrade doesn't fit the new joiner printed parts).
I've been tinkering with it for weeks now thinking that the poor prints I'm getting are just down to tuning for the new toolhead setup, but I'm convinced I've got mechanical issues. I've had the gantry stripped back (I even tried it with a modified extrusion-less setup in case my original gantry was trash) and I've rebuilt the stepper motor housings from the ground up. I've tried various belt tensions and rebuilt the toolhead checking everything is tight. I've tried with and without the hybrid belts in place - same issues all the time.
I'm at a total loss now, I can't get a nice print from it at all -- the main issues are with infill and parts of the perimeters being oddly wavy which I think is tiny layer shifts and I get bigger layer shifts if I let it print on for longer.
There is also a bit of a clunk when it changes x direction as demonstrated in this video:
https://youtu.be/4I9GxOIwPR4
I get the same issues with PETG and ABS. I've tweaked pressure advance, flow rate, line width, retraction, temperature -- I'm ready to throw it out the window and I'm considering downgrading back to 3.1.
If anyone has any thoughts/ideas of what I could try next I'm all ears 🙏
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