Almost let all the magic smoke out
I have a motor on a stand that I mount wire wheels, nylon abrasive
brush wheels, Scotch Brite wheels, etc. The motor is not totally enclosed so it draws abrasive dust and metal dust through it. I have been using the motor for over 20 years and I do blow it out from time to time. It has never given me any problems until yesterday. I was using it and I heard a popping noise and copious amounts of smoke started to pour out one end of the motor. I took it apart to investigate and it was pretty dusty inside but I could not find any obvious culprit for the smoke or the popping noise. There was one fine wire that was pulled a little away from the the rest of the motor windings and this wire looked a little cooked. So I painted the windings at that end of the motor with red Dykem, several coats, tucked the wire back up against the windings, painted a little more Dykem on, let the stuff dry, and reassembled the motor. It now runs fine again, doesn't get hot even after running for a 1 hour test, and doesn't smell of burned insulation. I checked the windings for continuity to ground and there is none. So I think I only let a little bit of the magic smoke out. Nevertheless I will continue to live dangerously and use this motor with wire wheels and so on. Eric |
Almost let all the magic smoke out
Call a priest, and have it blessed?
Christopher A. Young Learn more about Jesus www.lds.org .. wrote in message ... I have a motor on a stand that I mount wire wheels, nylon abrasive brush wheels, Scotch Brite wheels, etc. The motor is not totally enclosed so it draws abrasive dust and metal dust through it. I have been using the motor for over 20 years and I do blow it out from time to time. It has never given me any problems until yesterday. I was using it and I heard a popping noise and copious amounts of smoke started to pour out one end of the motor. I took it apart to investigate and it was pretty dusty inside but I could not find any obvious culprit for the smoke or the popping noise. There was one fine wire that was pulled a little away from the the rest of the motor windings and this wire looked a little cooked. So I painted the windings at that end of the motor with red Dykem, several coats, tucked the wire back up against the windings, painted a little more Dykem on, let the stuff dry, and reassembled the motor. It now runs fine again, doesn't get hot even after running for a 1 hour test, and doesn't smell of burned insulation. I checked the windings for continuity to ground and there is none. So I think I only let a little bit of the magic smoke out. Nevertheless I will continue to live dangerously and use this motor with wire wheels and so on. Eric |
Almost let all the magic smoke out
"Stormin Mormon" fired this volley in
: Call a priest, and have it blessed? I know of a Mormon elder who's temporarily out of work... G Lloyd |
Almost let all the magic smoke out
I'll be there in half an hour!
Christopher A. Young Learn more about Jesus www.lds.org .. "Lloyd E. Sponenburgh" lloydspinsidemindspring.com wrote in message . 3.70... "Stormin Mormon" fired this volley in : Call a priest, and have it blessed? I know of a Mormon elder who's temporarily out of work... G Lloyd |
Almost let all the magic smoke out
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Almost let all the magic smoke out
On Nov 8, 9:55*am, wrote:
On Thu, 08 Nov 2012 05:16:58 -0800, Larry Jaques wrote: On Wed, 07 Nov 2012 14:18:38 -0800, wrote: I have a motor on a stand that I mount wire wheels, nylon abrasive brush wheels, Scotch Brite wheels, etc. The motor is not totally enclosed so it draws abrasive dust and metal dust through it. I have been using the motor for over 20 years and I do blow it out from time to time. It has never given me any problems until yesterday. I was using it and I heard a popping noise and copious amounts of smoke started to pour out one end of the motor. I took it apart to investigate and it was pretty dusty inside but I could not find any obvious culprit for the smoke or the popping noise. There was one fine wire that was pulled a little away from the the rest of the motor windings and this wire looked a little cooked. So I painted the windings at that end of the motor with red Dykem, several coats, tucked the wire back up against the windings, painted a little more Dykem on, let the stuff dry, and reassembled the motor. It now runs fine again, doesn't get hot even after running for a 1 hour test, and doesn't smell of burned insulation. I checked the windings for continuity to ground and there is none. *So I think I only let a little bit of the magic smoke out. Nevertheless I will *continue to live dangerously and use this motor with wire wheels and so on. Wow, you lucked out, Eric! *Magic Smoke is so fine, _all_ of it usually *escapes whenever some gets out. *Congrats on the fix. Is Dykem that sticky that you can use it as an adhesive/varnish? Though certainly not as durable or tenacious as motor varnish it does dry fast, wicks well, and seems to insulate pretty well. I have used it in motors in the past. And once the motor is assembled there is really no way to cause physical damage to it. I really should buy some brushable motor varnish. I think I'll look for some online and see if it has a reasonable shelf life. Eric- Hide quoted text - - Show quoted text - The real stuff to use is glyptal insulating varnish, used to be a standard at radio-tv service supply stores, wouldn't have any idea where to find it these days. Was used for painting over spots where HV was leaking. Hope that motor has sealed/shielded bearings. My dad's homemade grinder used an old washing machine motor, but had a rather long belt between it and the pillow block he used as a grinder head. The motor would get all crudded up on the outside, but never quit working. No shield on the motor. Used old windmill angle iron for the frame. Not a lot of fun to drill. Stan |
Almost let all the magic smoke out
On Thu, 8 Nov 2012 09:09:32 -0800 (PST), Stanley Schaefer
wrote: On Nov 8, 9:55Â*am, wrote: On Thu, 08 Nov 2012 05:16:58 -0800, Larry Jaques wrote: On Wed, 07 Nov 2012 14:18:38 -0800, wrote: I have a motor on a stand that I mount wire wheels, nylon abrasive brush wheels, Scotch Brite wheels, etc. The motor is not totally enclosed so it draws abrasive dust and metal dust through it. I have been using the motor for over 20 years and I do blow it out from time to time. It has never given me any problems until yesterday. I was using it and I heard a popping noise and copious amounts of smoke started to pour out one end of the motor. I took it apart to investigate and it was pretty dusty inside but I could not find any obvious culprit for the smoke or the popping noise. There was one fine wire that was pulled a little away from the the rest of the motor windings and this wire looked a little cooked. So I painted the windings at that end of the motor with red Dykem, several coats, tucked the wire back up against the windings, painted a little more Dykem on, let the stuff dry, and reassembled the motor. It now runs fine again, doesn't get hot even after running for a 1 hour test, and doesn't smell of burned insulation. I checked the windings for continuity to ground and there is none. Â*So I think I only let a little bit of the magic smoke out. Nevertheless I will Â*continue to live dangerously and use this motor with wire wheels and so on. Wow, you lucked out, Eric! Â*Magic Smoke is so fine, _all_ of it usually Â*escapes whenever some gets out. Â*Congrats on the fix. Is Dykem that sticky that you can use it as an adhesive/varnish? Though certainly not as durable or tenacious as motor varnish it does dry fast, wicks well, and seems to insulate pretty well. I have used it in motors in the past. And once the motor is assembled there is really no way to cause physical damage to it. I really should buy some brushable motor varnish. I think I'll look for some online and see if it has a reasonable shelf life. Eric- Hide quoted text - - Show quoted text - The real stuff to use is glyptal insulating varnish, used to be a standard at radio-tv service supply stores, wouldn't have any idea where to find it these days. Was used for painting over spots where HV was leaking. Hope that motor has sealed/shielded bearings. My dad's homemade grinder used an old washing machine motor, but had a rather long belt between it and the pillow block he used as a grinder head. The motor would get all crudded up on the outside, but never quit working. No shield on the motor. Used old windmill angle iron for the frame. Not a lot of fun to drill. Stan Not sure if it is still avaialable, but I bough my bottle from (GC Electronics) from digikey several years back. Just checked - still available - GC Electronics 10-9002 Red Insulating Varnish. |
Almost let all the magic smoke out
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