This is my first time attempting to engrave a tumbler. It is wider at the bottom but this is just a test tumbler. It is just engraving lines and not filling, nor is the orientation correct.
first tumbler.lbrn2 (34.8 KB)
first tumbler.lbrn2 (34.8 KB)
I cannot imagine using a roller rotary with metal rollers. Slippage is almost a guarantee.
That said, 5600mm/m is much too fast for those rollers.
With curved sides on the mug, you would be lucky to get it to stay in the same position without rocking back and forth. Which would mess with the focus.
Overall, you have too many things working against you to get a successful engrave. I cannot tell, but if you have a chuck on that rotary, that would be a big improvement.
- Make sure the rotary is properly calibrated.
- Have the centerline of the rotary parallel to the Xaxis.
- Select the proper rotary [chuck|roller] for the object being engraved.
- Keep speeds low so the part does not slip or get slinged out of the rotary.
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Here is some help on rotaries as well: Rotary roller - Diode Laser Wiki
You need to build an adaptor for the smaller diameter part of the object. And you need some rubber or other sticky material on the rollers or objects to avoid slipping. Mike already mentioned most aspects, you need to get slower and orientation is a matter of settings.
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