Spindle buries Bitsetter to bottom

This has happened twice in the first week of learning to work this thing!

Right after a tool change it moved over to the BS and just went down to the bottom, stopped and gave error message about Bitsetter. I looked at the bit and thought- that looks to be set a little long maybe? It didn’t come close to crashing the side of the BS though. I loosened it and slid it up some and restarted everything. Seemed to work fine after that. The 2nd time was exactly the same scenario- it smashed the BS, stopped, error message, and I reset the height of the bit. Worked again.

Anyone else have this happen?
Was this a glitch or is bit insertion distance that critical without any way to know when you’re close to a crash position?

I’d like to not have this happen in the middle of a project and have to throw away and start over…

Thanks, Jim

Usually this is caused by a mismatch between job setup:

https://carbide3d.com/hub/courses/create/job-setup/

and how origin is set relative to the stock:

https://carbide3d.com/hub/courses/running-shapeoko/movements-zeroing/

c.f.,

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