To be honest I haven’t, but now I’m curious how would I even verify that, as I’d need the same reference to check. I guess I could use the toolsetter with the probe, then touch of on the workpiece, toolsetter on cutter, cut the workpiece then touch off again with the probe on the cut surface and see if there’s a difference.
Or… I touch off on a fixed reference surface with the probe.
Am I overthinking this?
I would be very surprised if you could get an accurate probe measurement off the tool setter. I think cutting a surface with a tool of known length, then probing that surface will be your best bet for calculating the probe’s offset. If you want to double check what probing the tool setter would do, then I think your plan would work.
If you can reach the table of the machine at A90 with the probe, then you can use the machine’s B table offset to verify the offset. You could also use a gage block or other precisely dimensioned reference against the table.