We recently traded up our CNC machines (1986-1998 Supermax's) for a 2011 Hass VF-2SS and a soon to arrive UMC750. We want to start running parts tomorrow on the VF2 but I'm having trouble figuring out how to get my Z value. I used to measure all tools and work off a 6" block from the table surface, everything was negative. Now I have a VF2 with a Renishaw tool presetter and a probe with a broken tip. I've used the presetter and probe combo before, but with not having a probe how do I find my WPC Z?

I'm guessing touch off my tool to the work Z, then add the tool length to the Z value?

Thanks!