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Powder coating power supply

Posted: Mon Jun 17, 2019 10:31 am
by jwax
Anybody play with powder coating? I have one with a small high voltage module that takes 120 VAC and outputs (technically) 11,000 volts. Unknown current, probably milliamps. This one has zero output, and the manufacturer says it'll be months before they have any more modules in stock.
It's fully encapsulated, so component repair is near impossible.
Looking for a small high voltage module, 120 VAC in, 10-12KV out.

Re: Powder coating power supply

Posted: Mon Jun 17, 2019 2:11 pm
by Janitor Tzap
jwax wrote:
Mon Jun 17, 2019 10:31 am
Anybody play with powder coating? I have one with a small high voltage module that takes 120 VAC and outputs (technically) 11,000 volts. Unknown current, probably milliamps. This one has zero output, and the manufacturer says it'll be months before they have any more modules in stock.
It's fully encapsulated, so component repair is near impossible.
Looking for a small high voltage module, 120 VAC in, 10-12KV out.
Is this an Industrial unit costing several hundred dollar$?
Or a consumer version?

The thing is....
If it's a cheap consumer unit, you can buy another cheap one for almost the same price as the replacement module.

Check out Harbor Freight, they have a unit for $69.99.
https://www.harborfreight.com/10-30-psi ... gKBJ_D_BwE

Yeah I know, I don't like too throw out equipment either, just because one part has failed. :x
But most of the time, the manufacturer doesn't give you the option of repairing a unit. :x
If it is possible....
See if the new Powder Coating unit you get, can use the old sprayer, hose, or other parts.
:wink:


Signed: Janitor Tzap

Re: Powder coating power supply

Posted: Mon Jun 17, 2019 3:38 pm
by Externet
Use a CRT high voltage flyback transformer sawed-off section from a defunct TV/monitor PCB ? You want DC.
Older copy machines have a high voltage module, very canibalizable. I have one at 7KV if suits you for $0.

Re: Powder coating power supply

Posted: Tue Jun 18, 2019 9:29 am
by jwax
Cheapy home version- probably just as well buy another.
Thanks guys!

Re: Powder coating power supply

Posted: Tue Jun 18, 2019 12:52 pm
by dacflyer
if i am correct, them static modules create HV DC
the material has to have a positive or negative ( can't remember which ) charge to keep the powder on as a static cling.
so you have to have a DC HV unit i think

Re: Powder coating power supply

Posted: Tue Jun 18, 2019 1:37 pm
by Lenp
Look around for a scrapped electronic air filter. Check the local HVAC guy's junk pile!
The power supply is usually a modular unit.

Re: Powder coating power supply

Posted: Thu Jun 20, 2019 12:17 pm
by haklesup
A diode ladder may be easier to construct that a step up transformer and rectify with flyback diode type of HV supply. They usually don't have much current but should be able to put a charge on a smallish object. Screw the electronics, make a van de graff or WIMSHURST generator, should work just as well but takes up a lot more space. Other types of static electric generators might work particularly if the object is non conductive, I think you need an active HV source to charge a metallic object

Re: Powder coating power supply

Posted: Thu Jun 20, 2019 5:30 pm
by Externet

Re: Powder coating power supply

Posted: Mon Jun 24, 2019 12:13 pm
by haklesup
I was reading a description on one of these little black cylinder modules somewhere else. They say they are easy to damage operating under no load. The typical application is an arc generator 1mm to 5mm long but they might work for static charging a conductive object for powder coating, they didn't comment on that application. If you just do an image search on HV power supply, there is no shortage of designs. I think what is needed is a minimum spec for one known to work for this application

At under $100 and if you still need a sprayer, this seems like a good deal, supply our own toaster oven
https://www.eastwood.com/hotcoat-powder ... -guns.html

https://frontstreet.media/2016/03/14/te ... r-coating/

Re: Powder coating power supply

Posted: Sat Aug 31, 2019 3:42 pm
by Janitor Tzap
Hey jwax,

I came a cross this 5.5KV high voltage unit.
https://www.goldmine-elec-products.com/ ... ber=G21544

If you still have the old unit, then I'd say the price is right, even with shipping. :D


Signed: Janitor Tzap