Marking graduations on the 200DX pedal?

[jakeru]

My super200P also has a current knob on the pedal. I made graduations on the pedal showing the % of power from 0-100%. Nothing very fancy... I think I just used correction fluid! It's OK, given that the pedal just gets kicked around on the floor. I'm sure one could do a much better job, but it does the trick.


If I recall correctly, there were some graduations on it when it was new, but they did not line up with the range of the knob travel. That made it hard to determine how it was adjusted just by looking at the pedal, so I used solvent to wipe off the old graduations, and "redid them" according to their true adjustment range.

Oh by the way, the knob broke (during original shipment of the welder... which was a few years ago.) so I replaced it with this style that is used on many old school guitar amplifiers. The long pointer of this replacement knob is quite functional however, in that it makes it easier to read where the current is set from the perspective of looking down on it from above.

[Joe from NY]

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:



Do these readings look correct for a 200 DX foot pedal?

[jakeru]

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:



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.)

[everlastsupport]

The schematic is in tech bulletins. Looks for a subject with pinouts. I think it is a sticky too. But the 200P and 200DX I believe are the same pedal and just a bigger 7 pin DIN on it.

[Joe from NY]

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.)

Man, that is funny, you did the same thing to your pedal as I did to mine.