··· Mach3, Auto Tool Zero Sensor & Connection Checker, Tool Change, Measurement ··· You Can Follow Steps as Pictures above.------------------------------------------------------------------- Check out whether the body of engraver is connected with end-mill electrically using checker. Connect the GND to body. Put the sensor under end-mill. Link with your Breakout Board (Black : GND / White : Input). It’s ok to join to other connector. If the GND wire & Sensor don’t contact, never turn on LED in Board. If the GND & Sensor Contact, LED is turned on / Normal. Measure Tool Sensor’s height precisely. Set-Up in Mach.-- Config -> Port & Pins. Set “Probe” in Input Signal as follows. If used other pin, input the pin instead of it. Apply --> Check. Go into the picture below in Mach. If the GND wire & Sensor don’t contact, “Digitize” is Off. Check “Digitize” is On/Normal. Click “Edit Button Script” in main Mach Screen. And “Auto Tool Zero” Button will flicker. Click this. If a new window shows up, input the code below. Every Set-Up is finished after saving. Operation Test.-- Put the Sensor under end-mill and click “Auto Tool Zero” button in Mach. The Z axis will go down while sensing. You can know that end-mill stops on to 10mm in surface.