old miller dynasty 200. found the problems, trouble finding the parts!

[spriggan]

Bump from the dead, had the capacitors and 4 small resistors replaced by a company called psi, upon starting the welder their is a loud buzz from the resistors...any help?

[spriggan]

i have soldered circuit boards before but to be honest i cannot get these capacitors off! i have a gas soldering gun…still, this is a pain. i will looking into more information when i have the time. usually when i get off work at 1030pm I'm not up to try anything with this board.

will...

[spriggan]

well, received the capacitors from mouser, they are rated at 400volts not 450 like the panasonic ones.

I'm confused here again…on the older panasonic capacitors it says 450volts. i am told that is the "VDC working" amount BUT panasonic does not offer a capacitor of this...

[spriggan]

so blue do you think I could pick better components or is that just causing a ripple effect down the line of better parts needed to support, "upgrades"?

[spriggan]

thank you that is correct, just called miller to verify…sourcing part numbers now...

found both on mouser.com, very helpful service


the capacitor #
661-EKMH401T152MB80T

resistor #
71-CPF3150K00FKR36

will be updating when they arrive...

[spriggan]

been searching and getting closer to finding these parts...

does anyone know what solder miller uses for their boards?

lead free or tin/lead?

i've been looking around and haven't been able to find this answer.

thank you
ryan

[spriggan]

here are some pictures just cause

the two large capacitors:



the liquid they spilled:



the 4 resistors:


the burnt backside of those resistors:
...

[spriggan]

S# LF313233

the large capacitors have a lifespan of 3000hours, over 10 years i think they reached that mark.

im hoping its only visible failures!

i'm thinking that these pieces can only be bought in large quantities or are now obsolete and discontinued
...

[spriggan]

hello everyone, i bought a used (bad idea) miller dynasty 200 a month or so ago.

i was welding 1/8 aluminum one night when i heard a nice fizzle and lots of smoke. i opened up the machine to see that first it was made in 2005, and second, the large can aluminum electrolytic capacitors...

[spriggan]

the artist and i have been using inweld 0 oxy copper rods to tac the sculpture together(i believe that is the correct name for them)the piece is a 9' tall JFK. he does not wish to use those for the finishing result. i arc welded the inner skeleton together and am in the process of cleaning up the whole...

[spriggan]

thank you for response, no pedal. i have used one but have not bought one, guess its time

yes the tungsten is ground correctly. the copper is just a mess. i jumped into this project at the end. all the panel overlaps are poor, I'm using small clamps and vice grips to get the panels close...

[spriggan]

hello everyone, i just joined the forum and searched for this topic but i don't feel I'm finding the answer for my specific problem.

i am using a miller xmt 304 cc/cv
lift tig setting with a #17 torch
1/16 tungsten using deoxidized copper rod, and electrical copper wire...