Problem
The focus changes across a large object.
Solution
The surface may not be flat or level. Focus at the marking plane, use a longer focal lens for more depth of field, or mark in smaller sections.
GM Pro 30W Split MOPA troubleshooting from the Monport laser FAQ.
The focus changes across a large object.
The surface may not be flat or level. Focus at the marking plane, use a longer focal lens for more depth of field, or mark in smaller sections.