By continuing to use this site, you agree to our use of cookies. Find out more
Forum sponsored by:
Forum sponsored by Allendale Jan 24th

J&S 540 Smoking

Smoke

All Topics | Latest Posts

Search for:  in Thread Title in  
Bob Astill17/09/2021 16:01:08
avatar
105 forum posts
19 photos

Hi all my 540 has started giving off a bit smoke and it appears to be coming from the base where the oil tray is with the motor and pump is it does not smell eletrical i have checked the motor and it all spins free i repacked the rear bearing with grease etc but i cant find where it is coming from? anyone had this before please.

Bob

David George 117/09/2021 17:16:01
avatar
1656 forum posts
497 photos

Hi Bob have you checked the chain and sprockets on the pump and motor for a little play but not too much. Also have you checked the spindle motor and belt for tension to make sure it isn't slipping er rubbing on edge of belt on its track. Give if a run with bottom cover and chain cover off but keep fingers clear.

David

Martin Cargill17/09/2021 19:13:59
165 forum posts

Our surface grinder at work has a leaky arbour bearing seal that sprays a little oil into the grinding dust. From time to time this mix is set on fire by the sparks from the grinding wheel. not serious as it just smoulders a bit, but it does mean stopping a grinding operation to clear the glowing embers. It produces an oily smoke.

Martin

Bob Astill18/09/2021 07:41:59
avatar
105 forum posts
19 photos

Thank you for the replys it has gotten a little worse now and it is definatley the pump motor as it does it without the stone switched on and turning?

Bob

not done it yet18/09/2021 09:33:43
6322 forum posts
20 photos

As they say “where there’s smoke, there’s fire. Def needs investigating seriously and rectifying immediately - and your insurance cover might need checking, too.

Dave Halford18/09/2021 15:54:57
1726 forum posts
19 photos
Posted by Bob Astill on 18/09/2021 07:41:59:

Thank you for the replys it has gotten a little worse now and it is definatley the pump motor as it does it without the stone switched on and turning?

Bob

Why the question mark Bob? Just channel the Monty Python parrot sketch as you look at it and hope it's sleeping (it isn't, it's a few minutes from letting the flames out of it to join the smoke).

David George 118/09/2021 21:19:50
avatar
1656 forum posts
497 photos

Check the contactor contacts that supply the motor as it may be a phase out or it may be the motor has a winding faulty. With a meter the three circuits should be equal resistance. It is possible to get these motors rewound if faulty.

David

Mark Rand18/09/2021 22:40:18
1059 forum posts
12 photos

It can be almost impossible to detect a shorted turn with a resistance meter. If you have a meter that measures current, then measuring the current to the motor on each of the three phases is more likely to detect a winding fault. Ok, it'll need three goes at disconnection-meter connection-reconnection, but it will show if there is a poorly phase on the motor.

Before you start this, is the grinder being fed from a good balanced three phase supply or a static or rotary converter? If the latter two, are the phase voltages reasonably balanced or is the generated leg much higher than it should be?

Bob Astill21/09/2021 08:22:49
avatar
105 forum posts
19 photos

Thank you David and Mark i have a friend coming round who is a sparks so i will show him what you have both said thank you it is a permanent 3 phase supply that i have.

Bob

Bob Astill24/09/2021 07:46:08
avatar
105 forum posts
19 photos

Update the sparky came we spent some time getting to the motor for a clear view the smoke is definatly coming from it phase one is 1.4A phase two is 1.4A phase three is 2.7A so i am going to take the motor out and send it to be checked thanks for all the replies.

Bob

All Topics | Latest Posts

Please login to post a reply.

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

Latest Forum Posts
Support Our Partners
Eccentric July 5 2018
cowells
JD Metals
walker midge
BOLDON
emcomachinetools
Warco
rapid Direct
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