Preview runs fine

[ednisley]

@GLettuce

fixed focus means it is supposed to be focused by using the piece provided to set it?

Indeed, but judging from some horror stories around here, that precious chunk of acrylic may not be the right size.

Run a focus test to find the actual focus point of the laser head and cross-check that with the “standard” focus piece.

I ended up making a step gauge so that I could tweak the head position a few millimeters one way or the other to suit what I was doing:

Best settings for cutting acrylic?

I made an assortment of acrylic step gauges with 1/2 mm steps. I find “best focus” for a given lens and then mark the correct step with a sharpie. It makes it easy to adjust focus and to “subtract” focus height for thick materials. Here’s a lbrn file for a couple of the ones I made. focus gauge 10a.lbrn (219.1 KB) Pro TIp: Make them out of brightly colored acrylic instead of clear, because when you lay the clear ones down they “hide” and play hard to find.

Trust, but verify!