Upgraded to build 636

[WillAdams (William Adams (Carbide 3D))]

Please upload the .c2d file you are having this problem with.

We have a blog post on this sort of difficulty:

https://carbide3d.com/blog/unexpected-z-axis-plunges/

I wrote a bit about using the BitZero at:

Using/verifying the BitZero

Here is how I check out the functionality of the machine/BitZero: first check that you have sent the correct Z-axis configuration This can be easily done by jogging down to the wasteboard surface, setting zero, then using the Rapid Position command to lift 6mm above the current zero — measure how much the machine moved — if it’s wrong: open the Log Window go to the MDI (EDIT: Note that it will need to be enabled in options in current versions) and send $$ and check that the Z-axis steps/mm …

including using the new version.