Paint sprayers

[Big D]

LOL--- Not sure where the 745 watts per HP came from but if you read the motor spec, you will see that it's Max 5HP (meaning the inrush for maybe 2 seconds). I ran one of these 5 HP with a 25 Gal tank for years and did have issues once in a while kicking the GFI plugs in my garage. When I built my shop I used 12 Gauge wire running 20 Amp runs to each Quad outlet. As for painting, my expe says you are on the right track, care more about how dry/clean you can get the air. I personal think the compressor will handle the volume (most paints with HVLP use 8-30 PSI for painting).

The first few times I painted something with mine HVLP, I had little overspray but lots of runs. Read and follow directions.

D

 

[Ross/Kzoo]

LOL--- Not sure where the 745 watts per HP came from but if you read the motor spec, you will see that it's Max 5HP (meaning the inrush for maybe 2 seconds).
D

You're dead on on this. 745 is the industry standard for 1 horsepower. Many times inrush is 3 times running amps. The high inrush for a short period of time ( maybe 1-2 seconds) won't blow most STANDARD breakers. So your 5 HP motor will probably be running @ 1.67 HP in actuality. Then 1.67 HP would be 1244 amps running.

 

[MrTube]

LOL--- Not sure where the 745 watts per HP came from

D

746 watts is the standard measurement of 1 horsepower for electric motors in the USA. Although I think there is a wide range of acceptance throughout the world, something like 730 to 750W.

Just as for horsepower on a internal combustion engine the formula of torque * RPM / 5252 = horsepower. This is typically what is used for automotive engines.

For example, 100 foot pounds at 2500 RPM would give you 47.60 horsepower at that specific RPM.

My problem with the so called in rush theory is horsepower is torque over time. This means 2 seconds doesn't cut it. It would have to develop 5 horsepower continuously to mean anything and a true 5HP motor will consume a minimum of 3730 watts or 16 amps at 230V.

I'm not saying your wrong with how they are coming up with this spec, i'm just saying its false advertising and we all know no one ever does that

 

[Ross/Kzoo]

I remember being aware of this discrepancy about 40 years ago when they advertise 5 PEAK horsepower for vacuum cleaners, routers, saws, and almost anything with an electric motor. They were measuring the amps drawn on initial start-up. After a while they just dropped the word PEAK.

 

[mrtexas]

Hi mrtexas, do you have fresh air supply for your compressor or is the compressor in a different area from where your are painting? Or do you have a good filter for your air supply to your fresh air mask?

I don't have a fresh air mask yet but I bought a used diaphragm compressor I thought I could use for a mask, hopefully it can deliver enough CFM to breath

I keep the compressor in the air conditioned shop. Since the compressor is oil-less I don't filter the air.

 

[MrTube]

I remember being aware of this discrepancy about 40 years ago when they advertise 5 PEAK horsepower for vacuum cleaners, routers, saws, and almost anything with an electric motor. They were measuring the amps drawn on initial start-up. After a while they just dropped the word PEAK.

Wow you know I never thought of that. I suppose "horsepower" can be used to measure power drawn / consumed as well. If a motor draws X amount of power at any given point you can claim that its the "peak horsepower" and just leave "consumed" or "drawn" off and be telling the truth.

 

[Fred K-OR]

Hello Mr Tube,

It would seem like maybe the first question about how to paint is to find out what you are painting and what kind of paint job do you want on whatever you are painting.

There are a number of types of paint that are much easer to use than urethane. Such as enamel or other such paints. These paints do not require all the stuff you need to do urethane and they produce a good paint job. So again the question is what are you trying to paint-if it is first of all a car and secondly maybe a driver rather that a show car, then some of these other paints give you a great job.

I used enamel on my driver and it looks great. I also had to learn as I went along. I found a good place to learn how to paint is to start on the frame and axles where maybe a bad job does not show. Then progress to other parts that again do not have to be perfect. Then lastly go for the fenders, body and other things that need a quality job.

I also found that the weather made a difference as to the quality of the job you get. So pay attention the the temps recommended by the paint supplier for doing a job.

Good luck and have fun.