Hello,
Hoping someone can help with this problem. I’m cutting 1/4" cherry and getting through the board with no problem using many different speed and power setting combinations. The problem is that the resultant profile of the cut piece is not straight (viewed from it’s side). It does not seem to be a focal length problem (beam widening) because in my testing I’ve changed focus from one extreme to the other – laser nozzle sitting right on top of the board, to focused on the top plane of the board, to 2mm out of focus above the board. In every instance (over 50 test cuts), the profile is exactly the same (see attached image). It just looks like the beam is shooting at an angle. A pulse test with tape over the nozzle shows the beam is perfectly (seat of eyeballs) centered and a pulse through the board cuts a nice tiny round hole right through. Metrics follow:
Machine: Chinese G460 60w, Ruida Controller
Speed: Tried combinations from 10mm/s to 18mm/s
Power: 12mA to 18mA
Profile of cut piece:
Capture.PNG
Thoughts?
Thanks!
-Brett