In the original message I wrote:
To use the BitZero with a probe you must have also have a BitSetter.
Otherwise, you cannot change the probe for a bit since it will result in a piece of metal with an unknown length sticking out of the collet. Which you’d then have to BitZero to measure.
@CrookedWoodTex suggested that this is only true when there are several toolpaths.
To which I responded:
You can’t measure Z with a probe, and then change the probe to a bit, and then run the job.
Here I was suggesting that the proposition is true all the time.
The operations described here are intended to be the only thing that is happening. That is, you cannot put a probe in, zero with that probe using the BitZero, then take out the the probe and put a bit in, and then hit “Start Job”.
edit: this is true with or without a bitsetter.