I'd like to use this treadmill motor and it's circuit board to run it but I'm not sure where to attach the wiring for a potentiometer. Anyone have any ideas? Thanks!

 

 

I'd just use a cable tie to attach it to the rest of the wires in a way that would prevent them form touching anything that gets hot. Don't want to melt the insulation off if they touch one of those mega huge resistors.

 

That looks very similar to one I have been using for the same thing. Been having to use the treadmill controls. I believe it is receives a PWM signal from the original topside operator controls. I don't think there is simple way of just adding a pot to control it like you can on a MC-60 control board. What I have done based on a recent YouTube video (can't find it now to give credit) simply rectified the output of a standard SCR speed control and fed that to my motor. Wired it up just last night and it worked great. Was initially afraid it would be noisy but in use I can't tell the difference. When I find the YT post I will add the guys name to a new post. It was actually a "duhh" moment for me when I saw it. Will be posting a question of my own about it later.

 

Here is a PWM conversion for a MC-2100 .
Max.

 

Not gonna lie, I'm not well versed in this. Circuit boards are foreign to me. I know enough to be scared of killing myself. But not enough to figure this out.

I'm kinda hoping for a savant to tell me "do this" lol. Thank you all for helping.