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Z axis steppers grinding noise TMC2130
I installed the TMC2130 drivers a few weeks ago now, but had some printer downtime, so have really only been using them for a little bit.
I seem to have prints that after a certain amount of time begin to fail. I can hear the extruder motor begin to click, so I baby step the Z axis up a bit and its OK for a few layers, then it comes back again. I cant babysit the printer through a 20 hr print, adjusting the Z axis what seems like almost every layer!
So I thought tonight id raise the Z right to the top and measure the offset from the rails that the printhead moves on, to the top of the frame, and they were off by a 2.5mm from side to side. Ive actually done this numerous times over the last week thinking the grinding noise was basically the rails not being level. but it always keep going back to a few mm off after a print and I get the extruder skipping/clicking symptoms come back. Obviously this offset is then affecting my bed level and all sorts.
The only mod I have done in that area is upgraded to the TMC2130 steppers. I did set the Z Axis to 0.85V as detailed on the wiki, but am I right in thinking that its likely set too low? It only seems to grind right at the start and (possibly, but not 100%) end of a movement. If I move 10mm up, it grinds, moves perfectly and then stops as it should.
Do you agree this would likely be the cause, either a too low, or too high(?) stepper voltage, would both cases cause a grinding from the steppers? Im thinking it could be too low. When starting a movement obviously you need a lot more torque than to maintain the same movement, so it could be too low maybe? Just after some advice before I open it up (again) and tweak the voltages.
I have them cooled by a squirrel cage fan and a 3d printed fan duct, so im sure cooling is OK, just not sure where to go from here without reverting back to the noisy drivers that came with the machine!
I cant tell if its one of the other stepper, sounds like both in my opinion.