By continuing to use this site, you agree to our use of cookies. Find out more

Member postings for John Lisle

Here is a list of all the postings John Lisle has made in our forums. Click on a thread name to jump to the thread.

Thread: AT1 inverter 3 wire control
28/02/2020 22:22:28

Hello again - OP here

Thanks everyone once again for sharing your expertise.

Stevie, not sure which manual you viewed that says "cannot be momentary pushbutton" - I can get start up and continuous run with momentary push with parameter 3 or 11. And I can get stop with momentary push on parameter 4 or 19. What I'm looking for is somethign activated when a circuit is broken momentarily, not when it is made momentarily.

Today I had a jolly time trying all the modes on flying lead-test and most again with the actual switches wired in.

The device behaves, to be honest, a bit oddly - I couldn't distinguish between some parameters, and others behaved differently to what the manual suggested, acting as change state switches (on and off) rather than one-time.

Bottom line is I didn't find an answer, so I think I need ot change my NC panic button to a NO one. That's a shame as my lathe has both in a single block )and imperial measurments), so replacing is going to be a bore.

Thanks again!

27/02/2020 19:24:14

Thanks everyone - lots to try there.

The manual linked (thank you martin) matches my machine. Alas there's no setting for 3 wire control.

I didn't explain very well - my setup was as the second picture just above - the switches in series.

It appears to me that the inverter only does "action when circuit closed" not "action when circuit broken", which seems surprising but there you are.

I can try to replace the NC stop with a NO one - I know from fly-lead testing that I can get that to work. I don't have a solution for the NC microswitches though.

I will have a go at the "keying operation" and "keying stop" tomorrow!

Thanks again - much appreciated.

27/02/2020 13:43:14

I've seen that several people on here have one of the "cheap Chinese" VFDs - in my case an AT1-2200X.

I'm trying to wire up a standard 3-wire control (run Normally open; Stop normally closed)... and it's doing my head in. Has anyone accomplished this?

I have X1 (say) set to 11 - keying forward switch. When I connect this to common across the NO button, the momentary push works perfectly - motor runs.

The problem comes with the NC stop button. I connect that across common and X5 and have tried:

X5 set to 1 - Starts normally but only get a momentary stop by pressing stop

X5 set to 2 - The motor runs immediately on turning on power at the wall. Stop works, but only on release of the button (as the circuit is re-made, not as it is broken)

X5 set to 4 - As 2 above, except the motor did not immediately run on startup. This seems to effectively make the NC button into a NO one.

X5 set to 19 (emergency stop) - Motor will not start, unless I hold in the stop button to break that circuit. Then stops when I release the button.

I'm obviously doing somethign foolish with either the wiring or the parameters, but I can't for the life of me see what.

I'd be very grateful if someone has done this and can tell me the two parameters!

Magazine Locator

Want the latest issue of Model Engineer or Model Engineers' Workshop? Use our magazine locator links to find your nearest stockist!

Find Model Engineer & Model Engineers' Workshop

Support Our Partners
ChesterUK
Eccentric July 5 2018
cowells
emcomachinetools
EngineDIY
Warco
Eccentric Engineering
Subscription Offer

Latest "For Sale" Ads
Latest "Wanted" Ads
Get In Touch!

Do you want to contact the Model Engineer and Model Engineers' Workshop team?

You can contact us by phone, mail or email about the magazines including becoming a contributor, submitting reader's letters or making queries about articles. You can also get in touch about this website, advertising or other general issues.

Click THIS LINK for full contact details.

For subscription issues please see THIS LINK.

Digital Back Issues

Social Media online

'Like' us on Facebook
Follow us on Facebook

Follow us on Twitter
 Twitter Logo

Pin us on Pinterest