SCR treadmill motor controllers

Thread Starter

white aurora

Joined Sep 26, 2019
Hi all,
I am wondering if some of you very smart people might help me to understand. I have several SCR treadmill controllers with matching motors. All of them work when attached to the upper control boards but I would like to use them for power tool motors. They are Precor controllers and I would like to know if or how it would be possible to run them from a potentiometer and eliminate the upper boards.

The questions is how do I eliminate the upper boards? I have attached pictures of the lower control boards to give an idea of what they are.