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Stress Test and Performance Analysis

21:15
25:30
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At 21:15 in

How to Build a Air Compressor on a Budget

What happens here

Perform a stress test using a demanding air tool, such as a 5-inch orbital sander, which typically draws 4-6 CFM. Observe the compressor's performance and pressure maintenance. The creator notes that his compressor struggled to maintain pressure above 90 PSI during continuous use, indicating a pressure buffer issue. The current pressure switch settings (cut-in at 90 PSI, cut-out at 125 PSI) mean the tank immediately drops below cut-in pressure when the tool is activated, causing the compressor to run continuously without a pressure buffer. This highlights a need for adjustment or replacement of the pressure switch.

Goal: Evaluate the compressor's performance under continuous load and identify areas for improvement.

Tools and materials

  • 5-inch Orbital Sander Baxar — Testing the compressor's performance under load
  • Pressure Gauge — Monitoring air pressure during the test

What they say

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that, I don't think I would change a thing. The six minute stress test taught me a lot of things about this compressor and how it's running. Um, I had a little bit of an issue building past 110 PSI after I ran it. So, my cutin pressure is 90 and my cutout pressure for the compressor is set at 125. That's just what the pressure switch was set at when I bought it. It came on the tank, so I didn't change it. I know I talked about in the video changing it out. think I'm going to. And here's here's why. So, it has a problem catching up with the demand of the air tool, which I don't know why, but what I think is that you pull air at 90 PSI. So, the tool is pulling air at 90 and that tank immediately drops below the cutin. Now, the [snorts] compressor is running at 100% duty, but there's no pressure buffer. So any small flow deficit shows up instantly. You can see it right. Um there's there's nowhere for pressure to recover. Now how how it's supposed to work is that the tank stores the high pressure energy. So it stores above that 90 PSI. The regulator regulates down to 90. The pump puts out 15 CFM. The tool demands four to six CFM. So essentially excess air in the tank is what recharges the tank. The tank pressure stab stabilizes instead of it collapsing it, right? Um the tank becomes the buffer basically. So when you have it and it cuts in at 125 and cuts out at 150, you're giving that compressor a head start already. When it's cutting in at 190 and cutting out at 125 and the tools running full balls at 90, you it's just not going to keep up. And and you would think it you would think it would because the compressor is at 15 and the tools only at four. So why 15 is bigger than four, right? Easy math. Um but another thing that you got to realize about two-stage compressors is that they run most efficient at a higher discharge pressure. um they lose effectiveness when they're forced to live around that 90 to 125. And they're designed for the 150 to 175 range. So, I think I'm really limiting my pump by not having it set at the 125 to 150 range. And I wish I could go up to the 175, but my tank just isn't rated for it. So, I want to jump on here and show you guys and and explain why that was happening. I am going to switch out that um pressure switch here to adjustable one. Set it at 125, have it cut out at 150, and I'll keep you guys updated how that works out for me. But yeah, so enjoy the rest of the video. I just want to jump in and say that. So,

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