Influencing extruder path to avoid spots on the surface


#1

While printing parts with shell mode, a shell with stringers and reinforcements on the inside, the extruder goes one round to make the outer shell, then moves from the rear of the printer to the front, goes left and right to print the inner structure. Depending on object geometry it can happen that the extruder passes from outside the printed shell to its inside, and sometimes rubs filament onto the already printed shell.

Happened with COPA Polymide, which is a great material but tends to string a bit.

Surface quality suffers.

4788

IMG_1086.jpg

To avoid this for a particular geometry, I rotated the object and added two "fake" objects (cylinder) to keep the path of the extruder inside the shell.

4789

Teil 3.png

4790

IMG_1087.jpg

regards

Andi


#2

While printing parts with shell mode, a shell with stringers and reinforcements on the inside, the extruder goes one round to make the outer shell, then moves from the rear of the printer to the front, goes left and right to print the inner structure. Depending on object geometry it can happen that the extruder passes from outside the printed shell to its inside, and sometimes rubs filament onto the already printed shell.

Happened with COPA Polymide, which is a great material but tends to string a bit.

Surface quality suffers.

attachicon.gif IMG_1086.jpg

To avoid this for a particular geometry, I rotated the object and added two "fake" objects (cylinder) to keep the path of the extruder inside the shell.

attachicon.gif Teil 3.png

attachicon.gif IMG_1087.jpg

regards

Andi

Yeah, I know what you mean by that.

Please pass me the model so we could test several alternatives using the example you've submitted.