I am printing a large cover, about 280x150x60 mm. The outside perimeter wall is 60mm tall and 3mm thick. Some of the wall prints with just long straight lines which is perfect. But some of it prints with a wiggly line that takes forever to print and is wearing out my printer. Here is a screenshot of the problem. The good straight printing is on the left and the wiggles are on the round corner and the top.
I don't see how any wiggles are needed at all. How do I avoid this?