Join GitHub today
GitHub is home to over 28 million developers working together to host and review code, manage projects, and build software together.Sign up
Oscillating wall thickness for thin walls, where the gap fill triggers in periodically. #149
This is not really a bug of Slic3r, it is a result of your printer (likely a 0.5mm nozzle?) and the way Slic3r tries to squeeze one or two lines into the ring. You are on the threshold of placing 1 or two lines. Normally you would modify the model, but I suppose you have no access to it. You may also increase or decrease the external perimeter extrusion width to move away from the threshold a bit.
I agree the current behavior is not ideal and it is on my list to do something about it.
It is the same issue as discussed here:
Here is my quite long description of what's going on:
I am going to leave your issue here as a topic for improvement, and rename the title. Thanks for the report.