This project is based on this YouTube video. Please be aware that I am not a professional circuit board designer and this information is shared from a hobbyist's perspective. Implementing this project is at your own risk, and it's advised to consult with a professional if needed.
The charge pump circuit prevents the spindle from unintentionally starting while not using Mach3 with a parallel port. Especially during power up or down of the pc, this can lead to the parallel port outputs being switched randomly, posing a safety risk. The circuit, reads the 25/12,5 Khz signal of Mach3 and enables/disables the machine via a relay.
The Webinterface of the D1Mini (ESP8266) provides a easy way to read the charge pump frequency and relay state and can be further extended as needed.
The D1 Mini can be flashed using OTA through the 'ip/update' page after the first inital flash.
Make sure to enable the charge pump feature in Mach3 and assign a free pin.
Website image
finished PCB for THT-Soldering, with bigger pads
