Hello everyone! Update: we are getting some feedback from other sites that the method has worked for them. One site the “bad” reading was 6.9 Kohms… which is still in the bad range. I have personally always seen in the ohms when it’s bad, however, I have seen flex fail at 20 kOhms. So the threshold is somewhere in that low Kohm range for failure.
Very informative! Just had a dead short to ground in a seven segment a couple months ago. Couldn’t you do the initial isolation by ohming A+ A- at the plug?
Absolutely! I have a broadcast video posted on how we do resistance checks on our PMs and we use the plugs. If you’re interested hit me up on chime and I’ll send you the link. When we made this video it just seemed a little easier to show it on the terminal. I actually wanted to make another one showing the isolation on the plugs and actually chasing down a bad motor vs simulating. But every since we have converted to resistance checks on our PMs we have had 0 motor issues :)
Just out of curiosity, once you've narrowed down your ground fault to a particular conveyor bed, would it not be easier to put your meter leads in the A+ & A- reading ohms and just unplug one motor at a time to see if the reading changes? Or are they in series?
No they are in parallel. If you have GEN2 design you are correct this would be easier. But with Gen 1 design (junction box and wago connectors) it’s not very easy to “unplug” so if you isolate one of the motors in the middle at the junction box you can measure both ways and eliminate motors that aren’t the issue. If you just put it on A+, A- and start disconnecting motors you might end up disconnecting all of them. But there’s more than 1 way to skin a cat. The important thing is understanding the concept. If you understand that you can adapt the micro details of the method to adapt to your style and what works best for you
Hello everyone! Update: we are getting some feedback from other sites that the method has worked for them. One site the “bad” reading was 6.9 Kohms… which is still in the bad range. I have personally always seen in the ohms when it’s bad, however, I have seen flex fail at 20 kOhms. So the threshold is somewhere in that low Kohm range for failure.
Superb explanation 👌
Very informative!
Just had a dead short to ground in a seven segment a couple months ago.
Couldn’t you do the initial isolation by ohming A+ A- at the plug?
Absolutely! I have a broadcast video posted on how we do resistance checks on our PMs and we use the plugs. If you’re interested hit me up on chime and I’ll send you the link. When we made this video it just seemed a little easier to show it on the terminal. I actually wanted to make another one showing the isolation on the plugs and actually chasing down a bad motor vs simulating. But every since we have converted to resistance checks on our PMs we have had 0 motor issues :)
What’s a good / bad reading?
Just out of curiosity, once you've narrowed down your ground fault to a particular conveyor bed, would it not be easier to put your meter leads in the A+ & A- reading ohms and just unplug one motor at a time to see if the reading changes? Or are they in series?
No they are in parallel. If you have GEN2 design you are correct this would be easier. But with Gen 1 design (junction box and wago connectors) it’s not very easy to “unplug” so if you isolate one of the motors in the middle at the junction box you can measure both ways and eliminate motors that aren’t the issue. If you just put it on A+, A- and start disconnecting motors you might end up disconnecting all of them. But there’s more than 1 way to skin a cat. The important thing is understanding the concept. If you understand that you can adapt the micro details of the method to adapt to your style and what works best for you
Dude more videos