Printer grinding against solidified plastic when printing raft
abbradar opened this issue · comments
Hi,
I'm not sure if this is me giving wrong settings to the printer, me doing a bad job at calibration or a software bug. When I print a model with raft printer severely grinds against the first thick printed layer (head visibly vibrates because of this). Later it stabilizes but not without a quality impact (first layers are squashed a bit). Do you have an idea what could go wrong? I did a manual calibration of Z0s, and test border looked fine. I leave a little more space between head and bed than you describe when calibrating (paper is just a little difficult to move, not impossible). My firmware is iMe V00.00.01.23.
With stock firmware V2016040401 it doesn't grind, head still vibrates but very slightly and rarely. I think that's a possible bug in iMe but I'm not sure -- can you confirm? Check on this model, with default settings (medium quality/fill) and a raft.
It sounds like your Z0 position has been calibrated slightly to low. You can manually set the Z0 position by positioning the nozzle at a desired height above the center of the bed and clicking the 'Save Z as bed center Z0' button in the Calibration section of OctoPrint's Control tab.
It's been a while since anyone has responded to this issue, so I'll probably close it in a couple of days. Let me know if you still have any interest in testing/fixing this issue.