Ok, we just recovered from a wiped out disk on chip. Replaced it with the newer Disk On Module. The machine is now runnable, however all diameters & depths from shoulder to shoulder are not correct with the programmed dimensions. This makes me think that the backlash, pitch error & other parameters may have been reset to zero. It is an EZ-Path SD. Can anyone provide a detailed procedure for checking/setting these parameters? Otherwise it looks like we will have to always compensate with the individual Tool Offsets.