I am using BitZero V2 with Carbide Motion build 566 on a Shapeoko HDM. If I do a Z-only probe it sets the Z-0 point 2mm too deep. The interesting thing is that if I do a corner probe, it sets the Z-Zero correctly.
I have played with this quite a bit and the Z-Only probe is consistently 2.0 mm too deep. The Corner probe consistently sets Z-0 correctly.
The BitZero V2 is 13mm thick: 11mm for the aluminum block and 2 mm for the new insulating plastic alignment plate on the bottom. I am willing to bet that BitZero V1 was only the 11mm aluminum block and the Z-Only function was never adjusted for the extra 2mm plastic alignment plate for V2.
If anyone else wants to check this it is easy to do. (And I would appreciate the validation)
- Set up some stock.
- Put the BitZero V2 on the corner of the stock
- Position the probe directly over the aluminum. (Not in the hole like a corner probe)
- Do a Z-only probe.
- Remove the BitZero.
- Do rapid position jog to Z+6mm
- Set the Jog rate to 1mm and start doing Z- jogs. You will find the pin hits the stock after 4 jogs.
I found another thread from @jwr that sounded like it might be the same problem but there was no resolution and the thread is now closed.
I have contacted C3D support about this and they keep asking questions about how I am doing it…the implication being that I am not doing it correctly. I am answering their questions but, I am becoming increasingly convinced it is not a user error. I hope they contact the engineers and have them take a look.