I got Blue, not Green

[JCLP]

I had a dream last night and now I have a theory. Got myself a T75 pressurized gravity gun.
Here we go with more testing.
Cheers,
JC

 

[JCLP]

I had a dream last night and now I have a theory. Got myself a T75 pressurized gravity gun.
Here we go with more testing.
Cheers,
JC

Well my theory didn't work.

JC

 

[JCLP]

Well maybe I should have spent my money on green instead of Blue.

I'm almost convinced that spraying BM Advance, 10% thinned with water, Q5, T70 bottom feed gun, different sized needles is not possible.
I have tried, I believe, every combination of air pressure, volume delivery and needle size possible.
I challenge anyone to prove me wrong. This paint is impossible to spray with HVLP.
If you want to take on the challenge, you must use no pressure pots or PPS system. Pure HVLP turbine and gun and not thin more then 10% with water, as the TDS states. No Floetrol as it is not compatible with Advance as it is designed for Acrylic/latex paint and Advance contains no Acrylic.

I may have a Q5, turbine only, for sale soon. Stay tuned.
Cheers,
JC

 

[wptski]

Well maybe I should have spent my money on green instead of Blue.

I'm almost convinced that spraying BM Advance, 10% thinned with water, Q5, T70 bottom feed gun, different sized needles is not possible.
I have tried, I believe, every combination of air pressure, volume delivery and needle size possible.
I challenge anyone to prove me wrong. This paint is impossible to spray with HVLP.
If you want to take on the challenge, you must use no pressure pots or PPS system. Pure HVLP turbine and gun and not thin more then 10% with water, as the TDS states. No Floetrol as it is not compatible with Advance as it is designed for Acrylic/latex paint and Advance contains no Acrylic.

I may have a Q5, turbine only, for sale soon. Stay tuned.
Cheers,
JC

A side from the Q5, Tom sprayed it, didn't mention any problems and he never edits anything out.

Tom's BM Advance Test

 

[JCLP]

Bill,

You'll notice that Tom uses the PPS system and that he has altered is air supply to the pressurized pot. He has tapped his hose to get full pressure to the pot. Even if he reduces the air to the cap, he still maintains full turbine pressure to the pot. I've tried something similar by use a pressure pot on the gun pressurized by a JC10 compressor and using all of the air from the turbine to the cap.

JC

 

[wptski]

Bill,

You'll notice that Tom uses the PPS system and that he has altered is air supply to the pressurized pot. He has tapped his hose to get full pressure to the pot. Even if he reduces the air to the cap, he still maintains full turbine pressure to the pot. I've tried something similar by use a pressure pot on the gun pressurized by a JC10 compressor and using all of the air from the turbine to the cap.

JC

Yeah but Tom has stated in the past that he never reduces air to the cap.  I have the same setup to use on either of my Gxpc guns but I just use it to turn off the air to the gun while feeding a PPS cup to near collapsed and then open it.

 

[JCLP]

So after carefully looking at the way Tom sprays Advance I can see the following
1) He's using a Q4 which produces 7.5 psi. I have a Q5 that I can dial down to a Q4. So I will do that.
2) The way his check valve is connected to the PPS cup, would lead me to believe that he is getting approx 7 psi to the cup. I will do the same using a compressor to deliver 7psi to my pot.

Now in the video he is using a 1.5mm needle on a T70 gun. I will do the same. Also, he says he is not thinning this. I will do the same.

Off to spray.

JC

 

[junk731]

What temperature/humidity are you spraying the product and the same for Tom. How do you mix your paint and how does Tom mix his paint. Basically what viscosity are you both spraying the product, without a Ford/Zahn type cup flow measurement especially with a problematic product like BM Advance you might as well try to compare an apple to watermelon.

I just read the tech spec sheet for Advanced and found something interesting, in the application section the only method listed is Airless with a pressure setting 1500 to 2500 psi. In my limited experience most stuff I spray is in the 300 to 700 psi range with my units max pressure being 1400 psi. Does this suggest anything?

John

 

[JCLP]

So after carefully looking at the way Tom sprays Advance I can see the following
1) He's using a Q4 which produces 7.5 psi. I have a Q5 that I can dial down to a Q4. So I will do that.
2) The way his check valve is connected to the PPS cup, would lead me to believe that he is getting approx 7 psi to the cup. I will do the same using a compressor to deliver 7psi to my pot.

Now in the video he is using a 1.5mm needle on a T70 gun. I will do the same. Also, he says he is not thinning this. I will do the same.

Off to spray.

JC

Well that didn't work.

 

[JCLP]

I just got this from Benjamin Moore. Advance Spray Recommendations.

Now I got something else to try.

 

[wptski]

Well that didn't work.

What do you mean by "That didn't work"?

 

[Swordstriper]

Contact Fuji. I had problems that sound like that and they sent me a new air diffuser rebuild kit. It made all the difference!

 

[JCLP]

Contact Fuji. I had problems that sound like that and they sent me a new air diffuser rebuild kit. It made all the difference!

Thanks for the advice. Went out and gout the re-build kit for my T70 and replaced all of the seals.
Now according to BM, they recommend a 1.3mil needle and cap and 7.5 psi and 5-10% reduction. I will try this and see if it works.
Cheers,
JC

 

[wptski]

Contact Fuji. I had problems that sound like that and they sent me a new air diffuser rebuild kit. It made all the difference!

Thanks for the advice. Went out and gout the re-build kit for my T70 and replaced all of the seals.
Now according to BM, they recommend a 1.3mil needle and cap and 7.5 psi and 5-10% reduction. I will try this and see if it works.
Cheers,
JC

This "may" apply to your T70 as well but might be meaningless overall!  I was fiddling with one of my Fuji Gxpc guns connected through a 3M mini-regulator to a 5 gallon tank.  That being quiet unlike the turbine, I heard air leaking from the handle grip.  There were a total of three leaks.  The aluminum nipple goes into a tapped hole that has a shoulder which didn't allow it to seal.  The quick disconnect fitting also holds the handle on but when the handle was tight the pipe thread wasn't.  Just forward of where the nipple is threaded hole into the gun body with a plug that has a straight thread which is loose by its nature.  I used Teflon tape on all three and did the same on my other Gxpc.  Would these leaks cause any issues?  Don't know but it's a heck of way to design a tool that uses air with leaks like this.

 

[JCLP]

Contact Fuji. I had problems that sound like that and they sent me a new air diffuser rebuild kit. It made all the difference!

Thanks for the advice. Went out and gout the re-build kit for my T70 and replaced all of the seals.
Now according to BM, they recommend a 1.3mil needle and cap and 7.5 psi and 5-10% reduction. I will try this and see if it works.
Cheers,
JC

This "may" apply to your T70 as well but might be meaningless overall!  I was fiddling with one of my Fuji Gxpc guns connected through a 3M mini-regulator to a 5 gallon tank.  That being quiet unlike the turbine, I heard air leaking from the handle grip.  There were a total of three leaks.  The aluminum nipple goes into a tapped hole that has a shoulder which didn't allow it to seal.  The quick disconnect fitting also holds the handle on but when the handle was tight the pipe thread wasn't.  Just forward of where the nipple is threaded hole into the gun body with a plug that has a straight thread which is loose by its nature.  I used Teflon tape on all three and did the same on my other Gxpc.  Would these leaks cause any issues?  Don't know but it's a heck of way to design a tool that uses air with leaks like this.

Interesting. Let me check my gun.

JC

 

[JCLP]

Okay. Test done. Another failure.

Talk to BM in that states and they also recommend, 7.5psi with a 1.3mm needle when using HVLP, as per the pdf I posted.
They told me that they were able to spray between 3.5-4.5 wet mils in a single pass. They do not recommend doing a second pass to obtain they required thickness.
Now, how the hell do they get a 4-5 inch fan and thick enough for one pass without splatter? I call BS on that. With a Q4 or Q5 there is no problem pushing the paint through the gun, the problem is that the 1.3 cap set does not provide enough air to atomize the paint. So what to do.

Cheers,
JC

 

[wptski]

Okay. Test done. Another failure.

Talk to BM in that states and they also recommend, 7.5psi with a 1.3mm needle when using HVLP, as per the pdf I posted.
They told me that they were able to spray between 3.5-4.5 wet mils in a single pass. They do not recommend doing a second pass to obtain they required thickness.
Now, how the heck do they get a 4-5 inch fan and thick enough for one pass without splatter? I call BS on that. With a Q4 or Q5 there is no problem pushing the paint through the gun, the problem is that the 1.3 cap set does not provide enough air to atomize the paint. So what to do.

Cheers,
JC

Should have asked them as to how one checks for that 7.5psi on a HVLP system?

 

[JCLP]

The Q5 has a variable speed knob. I asked Fuji to show me where 7.5 would be on the scale. So I set it there and actually increased the pressure to full pressure and it still comes out lumpy. I just watched a video on the web, and this person sprays same paint, Q4, gravity feed gun,looks like the 9600-G-XPC gun, 1.5mil and thinned 10%. It works for him.
Maybe its my gun.

 

[JCLP]

Checked my gun, hose connectors, no leaks.

 

[JCLP]

I AM A HAPPY CAMPER
Testing is done. Was able to produce a flawless spray. Now it's only being drying for an hour but it looks perfect. So what did I do.

I decided to bring out my Earlex Pro 8 gun out of retirement and give it a try. I used a 1.3mil needle, no thinning and full power on the Q5. I was able to get the paint to spray on thick and not lumpy like my T70 with same needle size. Now the only difference is that the Earlex uses the same air cap for 1.3mil needle and 2.0mil needle and has 2 extra holes for atomization. As I like the feel of the T70 gun better, tomorrow morning I will try the 2mil air cap and the 1.3 mil needle in my T70 and see what happens. If that doesn't work I will get Fuji to drill two small additional holes in their 1.3mil air cap.

Everyone wants a photo. I will see what it looks like after a few hours and if it looks nice I will post a photo.

Here is a link to the Earlex Pro 8 Gun. You can see the additional holes on the 1.3mm to 2.0mm air cap.

Earlex Pro 8 Gun
Cheers,
P.S. I should write a book on my experiences. Could save many of us a lot of time.

JC