Z Touch-off Puck
From PROBOTIX :: wiki
Retrofiting an existing machine:
Here is the inside of the connector for machines without the ATLaS Tool Length Sensor:
In order to use both the touch-off puck and the tool length sensors, you will need to cut off the existing DB25 connector for the tool length sensor and wire it in to the DB25 connector for the touch-off puck, as seen here:
Z-puck Usage
To set the Z origin using the z-puck, attached the aligator clip to the tool by either clipping it, or using the magnet. Place the puck under the tool, then click the [Set Z Origin w/ Puck] button. Be careful to keep your fingers out of the way. The Z-axis will probe down at 10IPM until contact with the puck is made. At that point, the Z origin for the height of the puck will be subtracted from the Z height, and current coordinate system Z origin will be set to zero at the base of the puck.