Will a cooling fan solve this issue?

Hi all -

Configuration:
Mendel90 / Sanguinololu / Sprinter / Repetier

I have noticed that I get some strange curling during overhangs on certain prints. I did a calibration overhang print (images attached), which shows the curling. I do not have cooling fan built (yet), still need to procure parts for the switch.

Thanks,
Rob

Yes a cooling fan definitely helps with overhangs. See the difference between the windward and the leeward sides of this print: [2.bp.blogspot.com].

There is something else wrong with the print though, even before the overhang starts. It seems to have gaps in the outline.

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[www.hydraraptor.blogspot.com]

The gaps are going to be inconsistent filament feeding, either because the filament is slipping on the hobbed bolt, or because you are printing slightly too cold.

I had similar trouble and the gaps but got then fixed by adjusting the steppermotor driver for the extruder a bit.

Edited 1 time(s). Last edit at 04/18/2013 02:02PM by darneg.