There have been a couple of threads here on power supplies and speed controls for fine feed. A quick approach is to go to your local Maplin's and buy an MFA speed controller and a suitable 12V supply – look at them online.

It's rather nearer than the prototype lashup I did for power cross feed for my Myford S7.

That is still in use as I never did get round to making it permanent, but as a "Temporary" power supply I used a transformer box, with built in rehostat, originally designed for model railway use. I think mine's a Hornby, but its in the other workshop at the moment. To be fair, the motor is smaller than your wiper motor off a car, so I'd suggest measuring the current draw on yours first.

The other thought I had, when it came to developing the design for the Dore-Westbury Mill, was to incorporate a 12v clutch from a car air conditioning compressor.

Edited By peak4 on 07/01/2017 17:50:23

Z as in vertical or crosswise, either would be interesting as you would still need to retain a manual function, or not.

Martin P