Ah, thanks for the explanation. I have a compressor with a tank that shuts down when the pressure reaches maximum, and a regulator at my booth, but since that regulator only controls the pressure out of the tank, it doesn’t affect the cut-off. In fact, I tend to use it like a tap and turn off the pressure if I take short breaks. That way I don’t have to release the pressure and wait for the tank to refill.
The only other compressor I had was a clone of the D500 Paasche which didn’t have a cut off. Then I used a foot switch to turn off the compressor everytime I stopped spraying.
I guess Porkbits’ auto shut off is pretty sensitive if a reduction in airflow sets it off. Probably a good thing!
It should not affect the airbrush spray quality any.
I also have the older Harbor Tool compressor without the shut-off and although it appears to be more rugged, I get tired of having to manually shut it off whenever I stop to clear a clog or something.
Thanks for the explanation, Tom. I suspected that the cut-off was engaging because the regulator was causing back-pressure, which apparently happens below 20 PSI. If I dial the regulator below 20, the compressor shuts off every five seconds or so.