Fadal Feedrate Potentiometer Doesn't Function

[ThatguyDave]

The feedrate potentiometer on my Fadal 1996 4020 doesn't function and I believe as a result the machine will not restart when the feed hold is pressed. Any input is very appreciated. I already replaced the potentiometer itself but that did not correct the problem.

Thanks in advance for the help.

[denmar]

If the 1090 Keyboard interface card was upgrade, chances are that the brown connector top left need the wires to be reverse.
at the 1020 clock card is a small brown connector make shure is ploged in.

[ThatguyDave]

Thanks for the heads up Denmar. I'm holding off messing with it myself but once an EE friend comes over with a logic probe I'll mess with that connector on the upper left hand corner of the board. Unfortunately it looks like it was installed properly and I haven't found any other wires hanging out anywhere. Judging by the lack of keyboard debouncing I can't imagine the keyboard interface card is an upgraded one anyhow.