Hi Folks,
I'd done a little etching on stainless using Cermark, with our ULS M-300 and found it was great.
But the problem that plagued me 6 months ago is back: y axis movement issues.
I found a ULS V400 very inexpensively on Fleabay, so bought it for spare parts, to hopefully get around the problem. It has 2 dead tubes, and no lens (they're keeping that) but otherwise worked fine.

IN the meantime I tested out engraving stainless on our 130 watt Golden Laser, and found the stainless warped quite a bit, even to the point of lifting, and hitting the nozzle which was the required 3mm above the substrate.

Just wondering if I'm the only one to have this problem, or if there are comments that might help me!

I wanted to laser some bigger plaques, but can't if I have this issue.
Thanks!