To home the z-axis using a plate:
- Connect the end mill using a large clamping device like an alligator clip with a wire connected to GND.
- Connect the plate (solder a wire to the plate) to one of the input pins.
- You can use the autoset to setup that pin in Mach3 simply by touching the two together once connected to the pin and GND.
Alternatively, the end mill can be connected to the pin and the plate connected to GND as long as there becomes a complete circuit when the end mill touches the plate.
To setup homing for the Planet-CNC homing and limits, go to the Planet-CNC Machine setup page which explains the process step by step: http://www.planet-cnc.com/faq/machine_setup/
How do I get homing on z to work with planet cnc software using build your own usb board. I have gone to planet website and followed the instructions provided but my software will not allow entries in the required fields they are grayed out is it because I am not using planet-cnc's board, I have used this method for years with Mach3 and would like to use it with the usb board and software.
Just received information from the developer. The instructions on how to use a plate for z-axis homing (moveable sensor) can be found here:
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How do I get Homing on Z to work with Plate and Ground using Buildyourcnc usb board all the entries for the sensor in planet-cnc are grayed out. I am using input z- and I purchased the software