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daid / LegacyCura

Read this, it's important! NEW CURA DEVELOPMENT IS HAPPENING AT https://github.com/Ultimaker/Cura, this is the Cura 15.04 archive. Cura 2.1 and newer is on the Ultimaker github.
https://www.ultimaker.com/pages/our-software
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slicing error with bridge: complete layer is considered a bridge #29

Closed jgeerds-zz closed 12 years ago

jgeerds-zz commented 12 years ago

I was slicing a battery/remote holder, with 2 horizontal holes in the side walls, and a larger slot for the power switch (19mm wide) across a 2mm thick wall.

settings: 0.1mm, 150mm/s infill > loops > perimeter bridge speed: 10% bridge material: 200%

problem: instead of just bridging the area/section that needs to be bridged, it bridged the complete layer, and due to my 200% extrusion rate, ruined the complete print: d'oh

bug solution: cura should only bridge where necessary, not everywhere, in addition to printing the perimeters/loops at the same slow speed as the bridge infill (right now, I think they are printed at full speed, which doesn't work at high speeds)

secondary issue: This bridging technique (squiggly short lines like solid infill) is somewhat new to me, I always thought a bridge is more like long slow extrusions pulling the filament from A to B. with my print order above, the bridge infill has no loop or perimeter to hold on to.

Suggested bugfix: override bridge areas to loop>perimeter>infill, making sure loop and perimeter are the same speed as bridge infill.

daid commented 12 years ago

Impossible to fix for me. Maybe Slic3r does a better job. I've seen Skeinforge do really stupid things with bridges/infill, but the whole infill code is a mystery to me.

jgeerds-zz commented 12 years ago

well, it was worth a try.