A circuit board to upgrade a Denford Micromill to a GRBL controller with optional BluetoothDesigned by Damped in Canada
Why I was given a Denford CNC machine that is in amazing condition. It was controlled through a proprietary software that is no longer maintained. Instead of reverse engineering the serial protocol...Read More…
I was given a Denford CNC machine that is in amazing condition.
It was controlled through a proprietary software that is no longer maintained. Instead of reverse engineering the serial protocol that interfaces to the old controller, I decided to make a new controller.
The new controller is based on GRBL and is a drop in replacement for the old one. It sits on the 93 way header and uses a cheap microcontroller board that is compatible with GRBL.
All inputs are protected with clamping diodes to protect against voltage spikes. Additionally there is an RC filter which debounces the switches and a buffer.
Because I don't have a computer near my CNC and I didn't want to make a USB cable to hook it up to my phone, I decided to add the option to add a Bluetooth transceiver to the board. This lets me connect to it using my phone and this works amazingly well. I do all the homing and Gcode streaming through an app called '''GRBL Controller'''. Everything works great! Please note that the bluetooth module is not included.
I will add more documentation when I have time. If you have any questions please contact me!
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Canada Post: Standard Ground Rate
Small Packet -- International Surface
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