User Profile

[G-ManBart]

You can skip the schematics and just go to the parts section of the manual and look at the exploded diagram for the area of the machine where they came from.

If I got the right manual, I'm guessing it's part number 134, which is on page 5 and 6 of the parts manual. That's part number 031670,...

[G-ManBart]

What part number do you get from the manual?

[G-ManBart]

I've put about a dozen of these guns on machines I've bought/sold and they're pretty darned nice...even compared to new Tweco and Bernard guns. They use M25 consumables which are easy to get, and cheap. The only thing is they use an HTP style liner rather than Miller, but that's not really a challenge....

[G-ManBart]

I'm sure you've forgotten more about welders than I'll ever know, but the RFC-14 uses a ceramic resistor and wiper....1000 Ohm, part number 175264.

The RFCS-14 uses a 3-wire potentiometer...wedge shaped rather than the kick box style....

[G-ManBart]

They aren't the same internally. The RFC-23A and RFC-23AG have 15 Ohm resistors. Those are the kind you need for the machines with two separate plugs like the 330 A/BP.

The RFC-14 and RFCS-23 both have a 1000 Ohm resistor (same pedals with a different plug basically). The RFCS-23 was...

[G-ManBart]

I know you solved the issue, but in case someone else winds up here with the same question I thought I'd add some details. Many times it's easier to find superseded part numbers on websites other than Miller's for some reason. Millerserviceparts.com shows that part number as being replaced by part...

[G-ManBart]

Welcome! You'll have to tell us the general area where you live since shipping would be very expensive. We have a pretty good supply of welders here in the Midwest but it's hard to find a Millermatic 251 for less than $1,500 unless it's really beat up.

[G-ManBart]

I have a Miller RFC-23A pedal I'd sell for less than the typical eBay prices....

[G-ManBart]

Absolutely....they are much louder than folks might realize. Not only are those chips sharp, they're hot and will melt right through many synthetic materials!...

[G-ManBart]

Glad to hear it!...

[G-ManBart]

I'd agree with you, but then we'd both be wrong. ...

[G-ManBart]

It's not an argument...just talking facts. Miller's own manual says not to dress the points, so the folks you talked to are already contradicting their own manual by suggesting any sort of abrasive use like sandpaper or crocus cloth.

The point I was making is that crocus cloth or even...

[G-ManBart]

A fine wire wheel is less aggressive than crocus cloth. All a fine wire wheel does to HF points is remove dirt and oxidation....not a mark left anywhere on the points (even the steel parts). You can remove metal with crocus cloth pretty easily...I do it on my lathe regularly. The same isn't true...

[G-ManBart]

I've done many, many, many points on Syncrowaves (17 machines so far) with a wire wheel and it works perfectly. Other than being cleaner, there is no difference before and after. The manual actually says "Replace point if tungsten end dis- appears; do not clean or dress tungsten." so I'm...

[G-ManBart]

Carbide has been used on various metal lathe and milling machine inserts/cutters/etc since the 1920s, so it's not a new concept. I don't know if the carbide insert material is different than on a woodworking blade but the saws themselves run much slower and the tooth size and count are very different....

[G-ManBart]

Did you look at how the input jumpers are set? For the machines that do 230/460/575 they normally default to 575 so you won't hurt anything if you hook it up to 230V. If the machine is set for 230V and you send 575V to it bad things happen.

This is another topic covered in the manual...

[G-ManBart]

I saw one that was welding oddly....user didn't check the input jumper position.

[G-ManBart]

There's a good chance if it's been sitting a while. Pull them out and run them over a wire wheel (they're tungsten and the wire wheel won't hurt them). I set the gap at .010" and have never had an issue with that setting...on 17 different Syncrowave 250s....

[G-ManBart]

All Syncrowave 250s go to 310, so at least that part's normal....

[G-ManBart]

The knob only rotates about 270*....from around 7 to 4 on a clock face, turning clockwise. I'd guess the shaft on that is a fairly common size and he could get a replacement knob that would fit from most good hardware places, then mark it the way you suggest. The factory knob looks like it's only...