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Picture of Remote CNC Stop and Monitor
mach3 stop button.jpg
monitor and camera.jpg

This project provides an inexpensive means of remotely performing a STOP (ALT+S) to Mach3. This is accomplished with a Raspberry Pi (RPi) + Camera connected to a PC via a USB cable. Monitoring and activating the STOP on the CNC is done with a video streaming web application running on the RPi. Using this solution should be done at your own risk. I highly recommend contacting the manufacturer of your CNC, and purchase and install the recommended remote emergency stop specified.

Note: This is not the same as an Emergency Stop (EStop) wired into your CNC control panel, but the execution of a hotkey to perform a STOP of Mach3.

Step 1: Parts

Picture of Parts
  1. Raspberry Pi Zero W
  2. Raspberry Pi Zero 1.3 Camera Cable
  3. Raspberry Pi Camera (Note: USB Webcams are not supported)
  4. Case for Raspberry Pi and Camera
  5. micro SD card 16 GB
  6. USB cable