7

My printer is exhibiting a problem wherein it's as if the nozzle pulls up on layers. I don't think it used to do this - it seemed like it manifested after I replaced the broken x-carriage with a printed one, but I don't see how that could have caused the issue. It's possible something else I did or replaced caused it; not sure. Allow me to give an example:

I'm trying to print a worm gear, with a tooth size of about 2mm. The teeth, as they appear in the stl, look kinda like

 ____________
<            >
  >        <
<            >
  >        <
<____________>

However, when printed, the edges are pulled upwards, looking more like

____________
\          /
_\        /_
\          /
_\        /_
\          /
 \________/

I originally noticed the pull-up in the surface finish of flat things - there was a grid of raised bumps on the top layer, I believe corresponding to the empty points between infill walls. That wasn't an effect that mattered to me, though. The effect on the worm gear is much more significant.

Anybody know why my printer is pulling up on layers, or whatever it's doing?

0scar
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Erhannis
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1 Answers1

6

If you print (overhanging/slanting) fine edges too hot with too little print part cooling, they curl up. Please increase the part cooling fan percentage or try printing with a lower hotend temperature. Another possibility is to print slower, this way the filament cools better for the same fan RPM settings (fan spends more time in the hot region).

The Simplify3d slicer website has a print quality troubleshooting section that describes the up-curl of edges, they also hint to overheating as the source of your problem.

0scar
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