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PLA making grinding noise in bowden tube when retracting
I haven't noticed a grinding noise but that doesn't mean I don't have it also.
Note that 40mm/sec is a little faster than the extruder can reasonably spin. But there was a bug in Marlin such that it didn't matter because Marlin was moving the filament much slower. But if you have the latest Marlin and are still using 40mm/sec for extrude/retraction speeds that might be a problem. Illuminarti wrote a blog entry about this somewhere. I'm not sure what a reasonable speed is. Probably 20mm/sec.
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gr5 2,230
I prefer lower temps with retraction:
http://umforum.ultimaker.com/index.php?/topic/1872-some-calibration-photographs/
I haven't noticed a grinding noise but that doesn't mean I don't have it also.
Note that 40mm/sec is a little faster than the extruder can reasonably spin. But there was a bug in Marlin such that it didn't matter because Marlin was moving the filament much slower. But if you have the latest Marlin and are still using 40mm/sec for extrude/retraction speeds that might be a problem. Illuminarti wrote a blog entry about this somewhere. I'm not sure what a reasonable speed is. Probably 20mm/sec.
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