Miller 375 Plasma Burt Cap..

[CapLeaker]

Re: Miller 375 Plasma Burt Cap..

Glad you got it working!

[sam_sam_sam]

Re: Miller 375 Plasma Burt Cap..

So did you get it working again if you did how well dose it work

[KG7AMV]

Re: Miller 375 Plasma Burt Cap..

Happy Halloween..

All parts arrived.. total Costs $18.00 - $28.00 Ish. for the Fix..

All Assembled see my blog for finial assembly and well the Result..

https://youtu.be/V6PePXDHt0k

Plenty of good conversation on this.

Did checks on both 110 and 240V all good.

[CapLeaker]

Re: Miller 375 Plasma Burt Cap..

I watching this post I might have to fix one someday

I figured you watching this one...

[petehall347]

Re: Miller 375 Plasma Burt Cap..

what is a "burt cap " ?

[KG7AMV]

Re: Miller 375 Plasma Burt Cap..

All parts on the way arrow had the best price on most items.

[sam_sam_sam]

Re: Miller 375 Plasma Burt Cap..

I watching this post I might have to fix one someday

[KG7AMV]

Re: Miller 375 Plasma Burt Cap..

Let us know how it goes! That Chinese Plasma Cutter I fixed in the spring is still going strong. Problem is to remember what goes where after something has been apart for a long time.

Yes, I took lots of photos on disassembly.. then had a phone crash so going on photos I uploaded LOL.. and Schematic's!

[CapLeaker]

Re: Miller 375 Plasma Burt Cap..

Let us know how it goes! That Chinese Plasma Cutter I fixed in the spring is still going strong. Problem is to remember what goes where after something has been apart for a long time.

[KG7AMV]

Re: Miller 375 Plasma Burt Cap..

Been a while but was waiting on the PTC R123 part Number (then got distracted) But,did just today get a reply from Miller on the PTC it is a VISHAY (BC COMPONENTS) P/N: 2381-663-93025 VISHAY (BC COMPONENTS) P/N: PTCTL8NR100HBE so I will click go on the shopping cart Wednesday.

Hope to free some time up mid next week and reassemble this been taking up way to much bench space.

[CapLeaker]

Re: Miller 375 Plasma Burt Cap..

Personally I would have done the same thing!

73!

[KG7AMV]

Re: Miller 375 Plasma Burt Cap..

looks like it but for blog content I pulled the transistors and cover.. But best to check everything.

[CapLeaker]

Re: Miller 375 Plasma Burt Cap..

That is what I was hoping for. Just the relay and the resistor. It could have been more, but I am sure the relay went out first, then the resistor burnt up.

[KG7AMV]

Re: Miller 375 Plasma Burt Cap..

Whats Under The Hood.. So far No Bad Parts.. Except the Relay and Resistor.

So All Burnt Parts, Replacements On The Way Prob Tuesday. Including that HX50-P Prob Still Good But it is Burnt..

[CapLeaker]

Re: Miller 375 Plasma Burt Cap..

There is a bit of information here https://www.elektroda.pl/rtvforum/topic3329021.html
Here is a translate of the miller reply to the person

Ouch! That sux...

[R_J]

Re: Miller 375 Plasma Burt Cap..

It looks like they used a ceramic resistor originally, 10 ohm
Digikey A102453-ND or TWW5J10RE-ND (5watt); A103695-ND (7 watt); A131255-ND (10 watt)

If that ptc is too large there are likely smaller ones that would work. I was basing it on the 600 volt rating of the miller part.
Ametherm site: https://www.ametherm.com/inrush-current/

[eccerr0r]

Re: Miller 375 Plasma Burt Cap..

570-1024-ND is quite large, hopefully it will fit: it's over 1.3" in diameter... At least it's thinner, however.

I'd be tempted to stick a regular resistor there, however...

[R_J]

Re: Miller 375 Plasma Burt Cap..

R123 Is a Thermistor Miller Part # 200656 I Found For 12.88.

Their Description "THERMISTOR PTC .10A 600VRMS 10 OHM"

Still Seems like an Excessive Price For a Thermistor? Anyone have a source for alternate source? I tried Digikey, Mouser, Etc... But Nothing with them specs..

http://miller4less.com/product_info....ducts_id=99742

I posted this: This digikey 570-1024-ND would likely work but it is $9.24

[eccerr0r]

Re: Miller 375 Plasma Burt Cap..

The only test I can come up with for the 218760A is to ensure there's no connectivity between pins when it's out of circuit much like a MOSFET. Otherwise probably SOL other than getting another from Miller if it needs to be replaced.

Likewise for 200656 it seems Miller wants custom fees for custom parts...

[KG7AMV]

Re: Miller 375 Plasma Burt Cap..

R123 Is a Thermistor Miller Part # 200656 I Found For 12.88.

Their Description "THERMISTOR PTC .10A 600VRMS 10 OHM"

Still Seems like an Excessive Price For a Thermistor? Anyone have a source for alternate source? I tried Digikey, Mouser, Etc... But Nothing with them specs..

http://miller4less.com/product_info....ducts_id=99742