Has anyone loaded up OnStep on one of the Adruino based 3d printer motherbords? Like this one?
https://smile.amazon...trol board 2560
These are attractive as they already include several of the requirements for mount control:
1 - An Arduino 2560
2 - 6 stepper motor controllers
3 - USB interface
4 - several inputs (for temp sensors and limit switches)
5 - cheap LCD panels are available and plug straight into the board.
These can be had for less than $20 (!!!) if you order direct from China.
The firmware (one being Marlin) on these boards is updated via the Arduino IDE. It looks like it might be possible with minimal dev work (mostly mapping pins?) to use these off-the-shelf with OnStep. With 6 stepper drivers, you could double up motors on the axis, and still have two drivers left for focus and filter wheel. Inputs for encoders might get tricky though.
Just wondering if anyone has given this a try.