Not cutting through all of Z despite correct sizes

Kiri:Moto CAM
1

Hi Stewart,
I usually have no issues cutting my simple jobs on my homemade CNC, but this one is strange: It finished the job 2-3mm before the bottom of Z. And that once I have activated “First Z Max”.
When I run the preview and count the passes multiplied by 2mm step-down, it confirms my problem.
And now, even when I un-check the First Z Max, I can’t get it to do it right either!? I cleared the cache…

I guess I must be missing something?!?
I attached the NC. STL is not accepted.

Thanks a lot and thanks for all your work, it is greatly appreciated by all of us.
Take care,
Martin
TableTop_600_2.nc (46.8 KB)

2

Can you right-click export the workspace and DM or drop the .kmz file here?

3

Hi Steward, sure, but not sure what DM is…!? In any case, here is the .kmz file.
Oh, and once you are at it, do you see why I can’t drill a simple hole, no matter what size of bit I create?

Cheers and thanks.
workspace.kmz (195.7 KB)