Does the bitsetter configuration remember it’s Z position? When I configured the bit setter during initialization, I installed a “short” v bit to get it centered over the probe.
If I’m using a longer bit for my next job, am I doomed to break it off because the bitsetter will move into position for a shorter bit?
No you won’t break another endmill with the bitsetter. It works on spring pressure and a sensor to “measure” the endmill length.
I thought it might come over at the same Z height. But it comes in at max z then goes down to measure…regardless of what z it was at when I “calibrated”…right?
Yes, before probing the BitSetter the unit will lift up so as to clear obstructions.
The Z zero will be maintained if you dont manually change a bit without using CM interface. After you set your Z zero it is maintained so long as you dont manually change the bit.
The way the BitSetter works is during initialization the top of the Z has the sensor. So the Shapeoko knows where that is. When you set Z zero the machine counts the steps from the top of Z down to where you set Z zero. So no matter what bit is placed via software prompts in either the CC file or gcode file and maintains the Z zero you set either manually or with the BitZero. If you manually change the bit without being prompted you can simply set Z zero again and it is maintained even over power cycles. The last Z zero setting is in a file called shapeoko.json. That is how the X Y and Z zeros are maintained over power cycles.