Hardwired Circuit

Try This !

Alternating foot switch

The press brakes I work on also have an auto/manual or jog postion switch.
In auto the press bottoms out to return either by a limit switch or another push of the foot switch. The latter is to allow the metal to relax to it's new deformation.

In manual-jog mode each time the switch is pressed the ram extnds until the switch is released. Repeated pressings of the switch will continue extending the ram.
All done with icecubes.

I don't have a schematic in front of me, but any old press brake should have an example.

I'd check the yellow pages for a sheet metal or metal fab shop in your area with an old Wysong. They may let you look at the schems.

Rod
The (CNC dude)