Mach3 Red (RnRMotion) and other motion controllers have Handwheel ports , these pins can be used for jogging bottons as well.
Here is a demo of jogging mode with handwheel port.

In previus video I show you how to add 8 more input, you can find this video here:
   • Add 8 more Inputs for Mach3 Red (RnRM...  

Full video in:
   • HomeMade JOG HANDLER for mach3 (Configs)  

Music:
Azimov Thunder