ITEM NAME:Cnc Z Axis Router Mill Zero Check Touch Plate Tool for MACH3 Setting Probe Hot3C Cnc Z Axis Router Mill Zero Check Touch Plate Tool for MACH3 Setting Probe Hot3C #aucsearchbutton #aucsearchbutton:hover { cursor: pointer;.Then in the Mach 3, you need to setup the probe(Mach3 --- Config---Ports and. if your interface board has the limit switch port or other probe port, you can. Pins---Input signals Probe enabled, the pin number type the one you use) and the.