i am using the lightburn and the longer ray5, I was engraving a circle on the mug, it was perfectly working then suddenly the circle is no more rounded rather tapered, I am using the rotary chuck and its turning but just not getting a round on the mug.
Usually, the object is slipping or the diameter is not correctly calculated. Here are some tips for rotary settings (e.g. speed and acceleration): Rotary roller - Diode Laser Wiki