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slic3r / Slic3r

Open Source toolpath generator for 3D printers
https://slic3r.org/
GNU Affero General Public License v3.0
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Dual extruders issue, skirt height for second extruder not used #991

Closed alpharesearch closed 11 years ago

alpharesearch commented 11 years ago

First - thanks for the great Slic3r program, it works realy great! To me the skirt feature looks a little bit inconsistent with dual extruders. But it could also only be me because I'm new to all this. It only does the loop for the second extruder if I set the loops to 2. In this case I get three loops on the bottom and for every other layer 2 (the minimum extrusion length is set to 5mm). But I do have my skirt height set to 9999? I also had an older profile and I was not able to get a skirt for the second extruder, but I did switch back to default and this works now. Some times the second extruder is not used for a while and if it would print a skirt every layer it would not dry out or I guess it could also help wit oozing.

alranel commented 11 years ago

That behavior was intentional, according to the mixed usages of skirt that already happens with single extruder: skirt is used for purging extruder on first layer and for protecting the print on other layers. The same thing was applied to multiple extruders: first layer is done with all extruder to purge all of them, while other layers are only done with the current extruder (last used one) since the purpose of skirt on those layers is to protect the object.

I think a purge tower should be implemented. Using skirt for mid-print purging seems a waste of time and plastic to me.

alpharesearch commented 11 years ago

Yes something to purge would be very helpful. I just found that if I have one object on the plater I get both skirts, but If I use the more function and add for example 5 objects the second skirt is missing. I can reproduce this by switching back to one object and I have both skirts again. The same issue if I import the same or other object with the add button...

jsturm commented 11 years ago

Try a skirt with more (+5) loops and you get the second extruder to purge as well. Is a little bit strange and not what I expected.

I beleve to solve the problem of oozing the software should retract, lets say every second, by (roughly) 1/2mm

Achim

alranel commented 11 years ago

@alpharesearch, I'm not able to reproduce your last issue so I think it was fixed in these months. Feel free to reopen a new issue with STL and config and steps to reproduce it, should you see it again. Thank you!