Yes that is a photo of a metal tumbler. Yeti is the brand.
I have my lasre engraving right now on a test run so I cannot see the machine settings… but is the stepper motor speed in there? I have been adjusting the x and y axis acceleration. It has slowed the overall time to engrave by alot but it seems to be more accurate.
The tumbler is uniform in weight, and I actually just put a bag of sand to weigh it down.
Rotational axis is level. I do have a stopper in place, and the tumbler naturally stays next to it as the wheels turn. That is a great trick that you mentioned for wine glasses. I will have to remember that. I wish i had something that would allow me to use that trick for this yeti.
Still having issues with the skewed text though. It seems like when i slow the acceleration down, that usually helps with the skewed text. But then I have an issue with gaps between lines… I increase the DPI when that happens, but still have some. I am at 900 DPI now and experiencing that… it truly does not make sense. Too add to it, I have taken my laser out of focus just slightly, so that the beam becomes wider. That actually helped quite a bit, but again… with all of the solutions I have mentioned, I still can’t get a dependable engrave each time.