Joe's 1000x600x200 steel and aluminium router started

[devmonkey]

My dual motor homing / squaring board is now working with the DDCS. Video clip below. DDCS was told to 'home' the X axis:

1. Each motor stops when its respective home switch is activated,
2. Once both home switches are activated the board signals home to the DDCS,
3. DDCS now backs X away from home searching for switch release,
4. If one motor's home releases before the other this motor is stopped until both home switches are released,
5. Once both home switches are released the board clears home back the the DDCS and DDCS zero's X co-ordinate,
6. DDC now moves X a pre-configured distance away from home.

This logic only activates when a home switch is hit and the machine is travelling towards home. If travelling away from home either switch hit signals the DDCS (i.e. it behaves as a limit switch).

The only downside of this is that in normal operation driving the machine past home in the X- direction requires both switches to activate before limit- is signalled. This is not a problem unless one of the switches has fallen off.