KING COAT GUN part#2 dissapointment

[Guest]

o.k., first hats off to powder by the pound for GREAT customer service, but i have been messing with this gun for almost a week now and i just can't get this thing to work correctly. have read the posts and started with no metering device, added the mettering device and still get this cernario: if i have enough air pressure to get the powder out and get a nice cloud of powder WAY TOO MUCH POWDER GETs BUILT UP IN THE BARREL AND AT THE GUN TIP. too little air and noughing comes out! just when you think you got the air pressure adjusted correctly and the powder flow adjusted correctly all of a sudden powder starts to bellow out or build up in the barrell! i have been holding a cup in my left hand and shakeing the powder out of the barrell every 4-8 seconds! yes the powder gets attracted to the part very quickly but it's extremely hard to not spray it with too much powder with the gun doing its thing. i don't know man i know there's a learning curve but this is getting rediculous.

[Guest]

Re: KING COAT GUN part#2 dissapointment

I HAVE HAD MY GUN A FEW WEEKS AND AT FIRST I HAD ALL THE SAME ISSUES,WHAT HELPED ME WAS TO TURN THE KNOB ON THE LEFT COUNTERCLOCKWISE AS FAR AS IT WILL GO,WITH LIGHT EFFORT,REDUCE THE SUPPLY AIR INTO THE CONTROLLER TO 4 OR 5 PSI,ADJUST THE LEFT KNOB A LITTLE AT A TIME SPRAYING AT A SLIGHT UPWARD ANGLE ABOUT 6 OR 8 INCHES FROM TEST PANEL.IF YOU POINT THE GUN DOWNWARD,LIKE I USED TO DO WITH MY HOBBY GUN,THE POWDER WILL FALL OUT IN MASS. THIS SETUP DOESN'T LIKE A LOT OF AIR PRESSURE. THAT IS WHAT WORKED FOR ME. HOPE IT HELPS. ALMOST FORGOT,EVERY TIME THE TRIGGER IS ACTIVATED MORE POWDER ACCUMULATES IN THE BARREL,AT THE END OF EACH PASS I TAP THE BARREL LIGHTLY ON ACUP TO EMPTY THE BARREL THAN I MAKE A SECOND PASS,IF NEEDED,USUALY I GET COMPLETE COVERAGE ON THE FIRST PASS.

[Guest]

Re: KING COAT GUN part#2 dissapointment

yeah will i tried everything the past 5-6 days nothing seems to get this gun to work correctly for more than a couple of seconds then bam powder falling out of barrell like a sieve! high pressure, low pressure, high voltage low voltage i've done it all. made sure powder was dry and close to the temp of the gun, put powder through a sifter before putting it in the cup, added a meetering device. i've run out of ideas and patience.

[Guest]

Re: KING COAT GUN part#2 dissapointment

I was having the same issue when I first started using the gun - I was first using the conical tip on it and then switched to the flat spray tip and that somehow seemed to keep the powder from building in the barrel and "farting" all over my parts, or at least it kept the powder built up from coming out all over.

[BeeBob]

Re: KING COAT GUN part#2 dissapointment

I don't have one, but does the conical tip somehow block the powder flow from the cup and by using the fan tip it opens it up more? Sounds like some sort of flow problem, have you checked the opening at the bottom of the cone and all the way to the tip of the gun for some sort of blockage, burs, etc.? One of the first things I did with the hobby gun was take out the 3 static tubes and then the deflector tip due to the huge powder build up. It still had powder build up, but nowhere near as bad. When you pull the trigger what releases and stops the air to the cup? The pro gun has a bladder at the trigger and they had alot of probs with those. Could it be a bad batch of the "air release valves"or whatever they're called? Just trying to help!

[wiseguyz]

Re: KING COAT GUN part#2 dissapointment

If you remove the gun tip, the bell end should come off the very end, and the large tip should seperate into 2 pieces. On the back piece that goes toward the barrel, there should be a series of holes around the perimeter. I had to take a welder tip cleaner and ream out the holes. They all looked like they went all the way through, but in fact they were almost all plugged. I had much better powder flow after opening those holes up. Also make sure the conductive pin from the barrel of the gun goes into the larger hole on the backside of the tip when you assemble it so air all flows properly in the tip itself. Mine is the ebay gun, but they should be basically the same.

[attachment=1:ufecjoh7]100_0826 [640x480].jpg[/attachment:ufecjoh7]
[attachment=0:ufecjoh7]100_0831 [640x480].jpg[/attachment:ufecjoh7]

[Guest]

Re: KING COAT GUN part#2 dissapointment

Wize, my set up only has one hole around the perimeter of that piece!

[wiseguyz]

Re: KING COAT GUN part#2 dissapointment

Ok...sorry, I was hoping they were closer to the same. At any rate, make sure any air holes are open and the tip is properly installed if there are any pins and holes that are supposed to line up like on this one.

[Desert PC]

Re: KING COAT GUN part#2 dissapointment

I'm glad others are seeing the same issues I have had and it's not just OE (operator error) on my part . I just returned from a 2 week vacation and plan to exercise my gun and powder valve arrangement this week and through the weekend; but I hope to have better luck with the powder metering fix than Mark61 had. I tried it on a few parts before leaving with great results, but the parts were small and I did not shoot for very long. When I get some results, i'll post them with settings and other details. I have a set of wheels and 3 bike frames to PC, so i hope it works. I would like to see PBTP come up with an *engineered* solution to these issues-- for $800, I should not have to make modifications and be frustrated to no end while work piles up. I agree customer service is good, but it seems like we are somewhat on our own out here.

[Guest]

Re: KING COAT GUN part#2 dissapointment

I wonder why Auto-Cycle had good results with this gun? Maybe his was a good one?

Jason....Any ideas or tips for these guys?

I'm glad others are seeing the same issues I have had and it's not just OE (operator error) on my part . I just returned from a 2 week vacation and plan to exercise my gun and powder valve arrangement this week and through the weekend; but I hope to have better luck with the powder metering fix than Mark61 had. I tried it on a few parts before leaving with great results, but the parts were small and I did not shoot for very long. When I get some results, i'll post them with settings and other details. I have a set of wheels and 3 bike frames to PC, so i hope it works. I would like to see PBTP come up with an *engineered* solution to these issues-- for $800, I should not have to make modifications and be frustrated to no end while work piles up. I agree customer service is good, but it seems like we are somewhat on our own out here.

[Auto-Cycle PC]

Re: KING COAT GUN part#2 dissapointment

Sorry guys, I have not helped out much to this point been pretty busy here on the home front. I have this gun and have used it at least 3-4 times per week for the past month. I have seen some of the issues you guys are referring to. I'm gonna walk through a few things here that should help, but everyone needs to keep in mind this is not the traditional hobby type cup gun you are accustomed to using.

The air pressure to the controller does not need to exceed 40-45 psi.

Every Powder is different and will spray differently. When you put the powder in the cup you should back the pressure all the way down on the regulator on the far left. The other two do nothing for the gun at this point.

I know how most of you feel about wasting powder, but if you have ever sprayed liquid paint you know you have to adjust the gun using the paint your going to spray before you start spraying your part. Well these are no different you must spray a little powder to waste to get the gun set properly. Turn the left regulator knob while pulling the trigger until you get the powder cloud you desire.

These guns have a lot more power and the attraction is much better than the hobby type guns dont be afraid to turn up the powder cloud and back away from the part a little farther it will reduce a lot of the back ionization.

Jason

[Guest]

Re: KING COAT GUN part#2 dissapointment

Jason, what psi are you typically shooting at?

When I first hooked my box up I first tried puting about 35 psi into the box and then regulating the pressure on the box, but that much pressure blew all the hoses off, including the hoses inside the controller. I've been having a lot of back ionizition problems and I'm thinking maybe if I put hose clamps on all the hoses and bump up the pressure maybe that will allow me to back away from the part further and reduce the BI. Only thing is, I've been using it with the psi around 20 when the trigger is pulled and it snow-blows a lot of powder at that pressure, don't know how much it would waste at higher psi...

[Auto-Cycle PC]

Re: KING COAT GUN part#2 dissapointment

The regulator does not read psi but I would say around the 9 o'clock position with the trigger pulled. I don't pay close attention to that though I just set it where I like the cloud. It should not be blowing the hoses off though especially at 35 psi. I have tested mine all the way up to 70 psi without any hoses blowing off. More pressure will only cause more problems and the gun will be very inconsistent above 45 psi. Casey what are you regulating the pressure to the controller with? Are you sure you have a good dry air source? Not doubting you just trying to cover the basis.

Try this Casey make sure you are supplying the controller with around 40 psi. Turn the all the regulators all the way down now with the controller power switch on 1 and powder in the cup adjust the left regulator slowly until you see the powder begin to flow. Keep easing the pressure up until you get the desired cloud.

For the back Ionization, how do you have your ground setup? What tip are you using? Be sure the air is dry or you will get starbursts.

I will say this again here like I did in the review of the gun. If you have old powder that is clumpy or powder that has not been stored properly these will not spray properly through these type guns. The clumps block the hole in the bottom of the cup and nothing can flow out. So if you have some clumpy powder sift it or place it in a fluidizing hopper to get it loose and flowing again.

[Guest]

Re: KING COAT GUN part#2 dissapointment

As for psi, I am just using a the regulator that came with my EW pro gun for the controller input pressure and turning the left knob on the box all the way open and controlling the pressure from the other regulator with a psi gauge on it that actually works. I had been shooting with the pressure at about 20psi with the trigger pulled, but tonight I put clamps on all the hoses and turned the pressure up to about 35psi and shot at about 30 I think. It wasted a ton of powder (about a cup and a half for each coat on the 4 parts in the pic below), but I was able to back much further away from the parts and get still have the powder reach the parts and get a good coat on them. Tomorrow I'm going to my local Grainger to pick up that valve that has been mentioned so I can hopefully turn the psi up a little more and keep the gun further from the parts while wasting less powder, hopefully.

As for the air - I do have a good, dry air source and have a moisture separator and a large coalescing filter about 35ft away from the compressor and 5ft from the gun. That is one thing I hadn't thought of yet though, because I didn't know that could cause starbursting - but I do definately have good dry air.

As for ground, I have posted it throughout the dozen pages in that other thread lol, but I have a 8ft copper rod driven 7ft in the ground with the ground from the back of the controller clamped to it and a ground wire for my rack soldered to it. I have also checked continuity and resistance between all points.

Also, very true of the clumpy powder, this gun will not shoot anything remotely clumpy or damp. I had some powder that did not even have any visible clumps in it - just BB size or smaller that could only be felt when "squeezing" the powder - and the gun would not shoot it till I sifted it.

(pics of the parts - silver base, candy blue, clear top coat - filled the cup on the gun 1 1/2 times for each color to do the 4 parts - does that sound about right for you auto-cycle? For reference, the flat pieces are each about 6 inches long by 1 inch wide, all pretty small.)

[Guest]

Re: KING COAT GUN part#2 dissapointment

Casey,


From the pictures it looks like the blue is on pretty heavy, but it might be the light.