Weressl.,,
As you mention the cycling on the air compressors i know pretty good percentage small to med size compressor do have on / off cycle period by pressure switch.
But however with dual operation compressors that will change a bit on that one due it run two diffrent way by pressure switch to turn on / off or use the unloader valve on the intake port [ some done by thottle down the intake ports ] on the contounits run units.
However.,, for majotry of the compressor work on most of them. I useally pretty much dail in pretty good with right set up. Few case i end up changing the pully to get it right.
With correct set up with on/ off pressure switch cut off point the FLA should be near or on the max amparage rating.
I will give you a quick rundown spec on my compressor so you will get the idea real quick. { Mine have dual operation either on/off or cont run mode with 175 PSIG system in there }
15 HP @ 480 V 3? FLA 21.1 amp loaded [ just before the pressure switch cut off or on cont setting ]
Unloaded mode 12 amp
the FLA plate on the motor is 22 amp.
Merci,Marc