|26 forum posts|
Saturday, as I was grinding some HSS toobits for a boring job I needed to do, my bench grinder got very hot on the case. Can't do without it, so I carried on. A short while later there was a small pop! followed by a puff of smoke.
I turned it off pronto, thinking how long was it going to take me to get a new grinder if the motor windings had cooked. I dismantled it from the stand and took the base off to look for problems and there it was..
The windings looked ok through the cable hole in the base of the case, so I guessed it was just the cap that had popped. I had a 2uF motor run cap handy, so I wired that in, and the grinder started up, albeit slowly, enabling me to finish the job.
The cap had let go so the value on the case had conveniently been erased by the goo that leaked out, so I emailed Warco, in hope rather than expectation, as to what value cap is fitted.
Hats off to them! Got a reply back on Tuesday. 10uF 450V. Have acquired one for RS, now fitted with a shiny new bracket rather than a bendy p-clip. The grinder starts as before the incident.
|Kiwi Bloke||14/08/2019 22:33:20|
|290 forum posts|
It's often worth scouring dumps to look for discarded appliances which need only a replacement capacitor to be restored to health. The suppression caps across the mains, especially if paper dielectric, often let go too.
Please login to post a reply.
Want the latest issue of Model Engineer or Model Engineers' Workshop? Use our magazine locator links to find your nearest stockist!
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.