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Side pealing off

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Why would the side peal off like this? It seems to go all the way down to the first layer.

Pealing off

Printer did have underextrusion problems (too high speed as it was just a test print for size). Is underextrusion the reason? Why?

Printed on UM2 in PLA, layer 0.2mm, shell 0.8mm, speed 50mm/s (changed to 30mm/s half-way into the print once I noticed the underextrusion issue).



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Look at this graph when choosing temperature's and speeds. At 210C and .2mm layer height the absolute max speed for a UM2 is about 60mm/sec (blue line in graph). You were too close to that absolute limit. I recommend you don't exceed half the max speed (30mm/sec should be fine at 210C). Anyway if you want to print 50mm/sec and .2mm layers then the graph tells us 240C is about right. I print at that speed often but if you want higher quality I would stick at 210C and 30mm/sec and be patient.



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