Originally Posted by
haastec
The only thing the OTS is used for when calibrating the OMP40 is for calculating the tool length of the OMP40; the OTS is not needed for any other OMP40 cycles. This value can be measured manually, of course, then input into the offset page for the appropriate tool location, but I am not certain if that same value is expected to be in any other macro variables for later use when performing any probing routines. For this answer I would have to defer to the probe experts here on the forum or you could call Renishaw directly. I am not sure if you have any local Renishaw offices in the Ukraine or if you would have to call them in the UK.
Good luck and please report back what you find out.