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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: Customer Response: How do I get homing on z to work with planet cnc software using build your own usb board. 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. You can use the autoset to setup that pin in Mach3 simply by touching the two together once connected to the pin and GND. Connect the plate (solder a wire to the plate) to one of the input pins.
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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. Other Possible Solutions to this Question Additional Information: Additional Information: Respond: What will happen: When the end mill (gnd) is in contact with the touch plate (Z-), there will be a connection from gnd to the Z- triggering this Z- action and the software will recognize the connection (like a button press, or a limit switch triggering). The touch plate (movable tool sensor) is connected to the Z- terminal. Alternatively, you can connect the gnd directly to the end mill is access is permitted. Click "Measure Offset Z" again to release it and restore normal mode." The connections to the USB interface is as follows: - The spindle is connected to the gnd terminal (which is also connected to the end mill). Click "Offset - Current Z" - this will set offset Z 5. Tool will move down, touch sensor and move up. Place movable tool sensor (touch plate) on material. How do I connect a Z-Axis touch plate to the Planet-CNC USB interface? Current Solution