[Diabolical Artificer]

Not sure a relay will work as that would need another power source to SW it. My idea was to use my bench supply to vary the voltage thus controlling the motor speed, which isn't ideal but works & then set distance with switches.

Not sure what the motor is, it's a cassette motor I think with a small flywheel on the back.

As I figure it each SW would need to do four things at each end of travel
1) Connect + to + of motor
2) Disconnect - from + of motor
3) Connect - to - of motor
4) Disconnect + from - of motor
& then do the opposite when at the other end.

Of coarse I could do this with one DPDT toggle SW quite easily but that would mean a bit more fettling stops, ehmmm, have to have a think about that one.

Andy.