Powder coating power supply

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jwax
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Powder coating power supply

Post by jwax » 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.

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Janitor Tzap
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Re: Powder coating power supply

Post by Janitor Tzap » Mon Jun 17, 2019 2:11 pm

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

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Externet
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Re: Powder coating power supply

Post by Externet » Mon Jun 17, 2019 3:38 pm

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.
- Abolish the deciBel ! -

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jwax
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Re: Powder coating power supply

Post by jwax » Tue Jun 18, 2019 9:29 am

Cheapy home version- probably just as well buy another.
Thanks guys!

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dacflyer
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Re: Powder coating power supply

Post by dacflyer » Tue Jun 18, 2019 12:52 pm

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

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Lenp
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Re: Powder coating power supply

Post by Lenp » Tue Jun 18, 2019 1:37 pm

Look around for a scrapped electronic air filter. Check the local HVAC guy's junk pile!
The power supply is usually a modular unit.
Len

“To invent, you need a good imagination and a big pile of junk.” (T. Edison)
"I must be on the way to success since I already have the junk". (Me)

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haklesup
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Re: Powder coating power supply

Post by haklesup » Thu Jun 20, 2019 12:17 pm

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

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Externet
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Re: Powder coating power supply

Post by Externet » Thu Jun 20, 2019 5:30 pm

- Abolish the deciBel ! -

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haklesup
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Re: Powder coating power supply

Post by haklesup » Mon Jun 24, 2019 12:13 pm

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/

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