Fiber laser engravers are better at etching metals.. Diode engravers can handle both, but they work at a slower speed. We recommend checking product descriptions and user feedback to see exactly what types of materials an engraver can handle. The shape of the object. Do you want to etch a design on an object with a flat surface? Or do you intend to engrave on a cylindrical object with curves? If it's just the former, any ordinary laser engraver can work for you. They have a large work surface that can accommodate flat items. But for cylindrical items, you will need to look for a rotary axis. This accessory is usually attached to a regular laser engraving machine and can engrave on glasses, mugs, etc. Also, check that the engraver can align the design on uneven surfaces.
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