I have numerous of those Chinese VFDs from 3 to 10hp on my woodworking and steel cutting machines and I have never had a problem with any of them and some are 4 years old.
The Huanyang (HY) brand is a popular china made VFD. Guys use these a lot on CNC conversions because they are affordable and they have good documentation. A lot of the HY counterfeits have little or no documentation or support. There are several youtube videos on how to wire and set up the parameters on the HY. I have a Lenze VFD which is USA made and has really good documentation but it is more expensive. I have in installed on a CNC milling machine I converted.
Saw him in concert a couple years ago, awesome! Saw him 30+ years ago in college as well. Fun Thorogood trivia fact.. he's OCD big time.. crews must meticulously vacuum the stage prior to him going out.. if there's a speck visible he has refused to perform. Heard this from one of the vacuum crew!! Best concert I've been to recently was Buddy Guy. Now I'm a blues fan!
I probably missed your explanation, but why keep the unloaded pump running, rather than cycling off/on to keep pressure within your chosen band? I'm thinking I'd keep it 'idling' maybe during periods of heavy air use so as not to have to spin the flywheel back up every minute or two, but otherwise - especially at 37 cents per kWh for our electricity - seems like a waste.
The operating philosophy for the 340 trimmed out with the unloading pilot was to spin the compressor at full speed unloaded to eliminate the high current motor starts. The VFD gives me two things: peace & quiet while still ready to make air, and 2) minimal electric Co sumotion. I did Amp readings in one of the videos. The amps and volts are way down at idle, so it's pennies for how much I use it.
I would think that the low rpm limits are there because logic would say just go down to the next smaller compressor and save money. The 340 has an oil pump and the unloader protects from low oil pressure, so I'm sure that point, where oil pressure drops, is your real lower rpm limit. Above that I assume it's all good, until you get above their maximum recommendations. One guy I know whose Quincy knowledge is unparalleled, runs his at 120% of maximum without issues.
@@EngineersWorkshop the nice thing about the fincor drives was the ability to repair it at a component level the issue is it’s hard to buy those components I heard an SCR blow up on a dc fincor drive cause the anti plug board went bad someone reversed the motor wile it was coasting sounded like a shot gun going off but we were able to scrounge SCRs and replace them anyway good video sir
@@EngineersWorkshop okay cool I was just curious what brand oil it is because I have an older Kellogg American 452 air compressor I was playing on getting running pretty soon so I just wondered what you use
Search eBay for "banded v belt". The ones I buy are PowerDrive. Reasonably priced and seem to run pretty smooth. The size on the compressor is "B" cross section, three vees.
@@kooldoozer Massive site to find and post specific interests. Here's my subreddit: www.reddit.com/r/EngineersWorkshop/ , I also started www.reddit.com/r/MachineRescue/ and here's one using your term: www.reddit.com/r/Skookum/ ... there's a subreddit for virtually EVERYTHING
