Description:
Diameter：(Approx.) 1.38inch
Height：(Approx.) 0.79inch
Effective surface of the knife: 0.98inch diameter
Connect the wire of this tool check insturment to the tool connector of your Control board of the machine , then the control board's GND connect to the frame of your router ( the frame of the router and the spindle must have connections)

Two ways to connect this item:
If your interface board has the limit switch port or other probe port, you can connect it to that port .
If your interface board does not have that port, your driver board has that port, you can connect it to the driver board's limit switch port.
Then in the Mach 3, you need to setup the probe(Mach3 --- Config---Ports and Pins---Input signals Probe enabled , the pin number type the one you use) and the Auto-Tool-Zero.

Package Included:
1 x Cnc Router Engraving Machine Tool