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Help, First time powdercoating, Powder Won't Stick to Part

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nateman
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Help, First time powdercoating, Powder Won't Stick to Part

Post by nateman » Fri Sep 02, 2022 6:33 pm

Hey guys, I'm new to powder coating, and especially new to these forums. I come here since I need some help. I just got my powder coating setup but have been having two issues. The first is I've been having issues getting enough powder out of my gun/ it not sticking. I wouldn't say its not putting out enough powder, but it will just be there with no powder grabbing on. It has a hard time getting powder on surfaces. This and I have no clue if you can use "too much powder" Anyways, thanks if anyone helps. Im using the eastwood, dual voltage gun. I have it on the low side, still has trouble getting powder on. Only thing I could think is too much air pressure, but its already pretty low. I also haven't been using the deflector since I do small parts, if that could cause anything.

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djreiswig
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Re: Help, First time powdercoating

Post by djreiswig » Fri Sep 02, 2022 7:46 pm

No experience with powder coating, but I looked up the gun you have. It says 5-10 psi air supply. It also has a ground clamp. Do you have a good connection to the parts you are coating? I would think a bad ground would cause the powder to not attract very well.
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34by151
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Re: Help, First time powdercoating

Post by 34by151 » Fri Sep 02, 2022 8:00 pm

nateman wrote:
Fri Sep 02, 2022 6:33 pm
The first is I've been having issues getting enough powder out of my gun/ it not sticking.
Im using the eastwood, dual voltage gun.
haven't been using the deflector
First thing the eastwood is a good low cost place to start but if you continue you will want to upgrade it to a better gun.
Never fill the eastwood cup more than 20%
IE mostly empty. Any more powder and it will come out in clumps

Air pressure is very low around 3psi
Put a mini spray gun regulator on the gun.

You will need to shake the eastwood constantly to get the powder to flow out the gun.
Until you get the hang on it this will vary from no powder to massive clumps

The earth is also very poor on the eastwood.
Add an earth stake, connect the gun earth to the stake, run a new wire from the stake to the job
This is fairly common issue with the eastwood, most likely the cause of your powder not sticking
IE no static charge

Use the deflector. Have the gun 45 to 90 deg to the job. Keep shaking the gun
Powder should come out as a light mist
Make sure you have plenty of light to see you have full coverage
Keep a good LED torch with you and use it to check coverage

If you stick with coating strongly consider an upgrade to the redline EZ50 or EZ100J
I have a Gemma setup, EZ50, EZ100J
For Most jobs I use the EZ100J and use the Gema setup for big jobs that use lots of powder (hopper takes 20kg boxes of powder)

BTW I started with a Chinese setup (same as the HF ones)
Replaced that with the EZ50 and never looked back
Upgraded to the EZ100J as it was not available when I got the EZ50
Got the Gema setup at auction, massive upgrade on the EZ100J but too big for 90% of what I do
Most of the Gema is wasted on my small runs where the EZ100J is perfect

Hope that helps
Let us know if you need more

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acourtjester
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Re: Help, First time powdercoating

Post by acourtjester » Fri Sep 02, 2022 10:47 pm

Check to see if there are YouTube videos on the gun, people post Mods to make them work better. If you have a good pattern of paint coming from the gun and its not sticking to the parts, you may not get getting a go connection for the electrostatic charge to attract the power and hold on to the part. I have a dual voltage unit (not sure of the brand but cannot see them being much difference) I always use it on the higher voltage setting.
Main thing flow out of the gun and return clamp on the part to make the circuit for attracting the power.
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Re: Help, First time powdercoating

Post by sonbakler » Tue Sep 06, 2022 7:37 pm

I have used an Eastwood gun for almost 10 years. Yes, it is a starter gun but it gets the job done for me.

If powder if not sticking be sure you have voltage and a good ground. To do this ground your part to the Eastwood ground cable, press and hold the trigger button for voltage and hole the tip of the gun close to your part, you should see a spark arc across the gap.

If you see this there is no reason why your powder isn't sticking. Do you get an arc?

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Re: Help, First time powdercoating

Post by GKimble » Wed Sep 21, 2022 11:35 am

If powder is not sticking to the part, you have a grounding issue.

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Re: Help, First time powdercoating

Post by adbuch » Fri Sep 23, 2022 7:37 am

GKimble wrote:
Wed Sep 21, 2022 11:35 am
If powder is not sticking to the part, you have a grounding issue.
I would expect that could be a possibility. Also power supply settings or a faulty unit.
David

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