Hello;
I don't know if there is already an open source Mach3 turn on/off and speed controller interface for a Sieg X1 or X2 type spindle drive (for the original DC motor) keeping the original Sieg drive and the manual speed control option.
Some time ago I started working on a converted Sieg X1 and made one interface for my own use. Since my free time was very limited at that time, I made it on a protoboard on the fly and have no schematics. Parts used were the ones available at my home shop and I don't think I used more than $20 on parts.
Now I have a little more time and would like to document the interface, design, send gerbers to a fab and assemble a proper PCB for it.
The circuit uses 3 small relays. 1 opto coupler, a few transistors, a couple of small signal mosfets and one IC (it uses the charge pump signal from a K4 board, otherwise it would need to duplicate the charge pump detection circuit using another IC). Spindle controller is completely isolated from the PC. Just disconnecting the interface cable or pushing EMG stop in Mach3 restores manual operation if required.
Forward/Reverse is still manual I don't think it is difficult or too expensive to add but I didn't need it. You can also manually turn off the interface and no remote control is possible (for safety). Note: My interface does not replace the original Sieg motor drive. It keeps the original "potentiometer' switch behavior" functioning because I consider it a safety mechanism.
Before dedicating more time to this thread, Is there any interest on this subject?
Best regards,
kreutz