alwayslearningperson

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> What is your printer model and firmware version? > […](#) Prusa i3MK3S+. Firmware version is 3.9.3 which is the latest one.

> The gcode looks fine after welding, so whatever the problem is, it is not obvious: > > ![image](https://user-images.githubusercontent.com/33363128/113061829-471b3300-9178-11eb-97e5-ef53704fd82c.png) Thanks. Why the top part does not look smooth, round and...

The problem is not caused by Arc Welder. Sorry