Quote Originally Posted by Joe from NY View Post
i dont understand why on mine as i rotate the knob on the pedal through the entire range of rotation (without stepping on the pedal) from the 8 oclock position clockwise to the 5 oclock position, the amps displayed on the LED go lower and lower from "023" until they show zero at the 3 oclock position, but then start to go up again until they get to "023" when i reach the 5 oclock position. The zero position is not on the exact middle of the range of the knob.

When i unplug the 7-pin connector from the machine and i put a DVM set to check ohms and put it in the pins of the cable, i get the expected action of ohms reading throughout the range of motion of the knob.

This is a chart of my approximate readings that i measured with my DVM:

Click image for larger version. 

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Do these readings look correct for a 200 DX foot pedal?
I know I don't have a 200DX, but here are some measurements I took from my Super200P's foot pedal which like I've shown earlier, has a knob in it like the 200DX.

(Maybe they'll be useful to you, maybe not?)
http://www.hobartwelders.com/weldtal...084#post293084

PS - I looked for the linked schematic of the pedal electrical system, but it appears to be gone. (I think it was on an image server that went down.)