It’s hard to shoot these by myself, so 2 different angle (2 different knives)
This is the machine. A Foley Belsaw model 355
Basically the motor with a grinding wheel rides the track and the knives are clamped to the rail. I have numerous shims to get them set the right distance. The carriage for the motor/grinding wheel also moves to and away from the knife rail. The head obviously pivots to the proper angle of the original grind bevel of the knife. The wheel in the second video to see me turning is a micro up/down adjustment.