I decided to start with a test cut of the wedges that will be screwed to the bottom of my sled (cut from UHMWPE) to reduce friction and provide vacuum air space beneath the sled (for the eventual vacuum system)
The precision is great (I ran the same g-code twice since it didn’t quite cut all the way through in all parts of the workpiece, mainly because it is a scrap piece of ply with a bit of a bow in it). On the second cut it was within about a half millimeter of the first cut.
I haven’t done any calibration yet, so I am not surprised that the accuracy was not quite there:
Overall the shape is good, but for a part that has to mate to the laser cut steel sled, it’s not nearly close enough. I think for something like an art shape, it would be fine, though. I have plans to cut Max the dog to go with my Grinch, which I cut manually a few years ago, and I think that if I did that now, it would probably look fine.
It has been so long since I read all the calibration posts, and I know there are some new techniques out there (though I haven’t loaded the latest GC and firmware as yet), so I’ve got a ways to go with my reading.
That said, my goal today was to get my new z-axis mounted and it worked so well that I figured I’d try a first cut for the heck of it. Very pleased!
Head over to the z-axis consolidation page if you are interested in the z-axis and some video of the cuts.