Electronics > Beginners

Almost completed rebuild of "old" bench grinder

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fixit7:

--- Quote from: dmills on July 11, 2019, 06:36:01 pm ---
--- Quote from: fixit7 on July 11, 2019, 02:43:22 am ---sci.electronics.basics (A google group)

--- End quote ---
Respectful? S.E.* ??!?
Useful, yea, grant that, but no group with Phil Allison as a member could be described in those terms!
 
If you hung around Usenet before the "Eternal September", in the electronics groups you will know who I am talking about, back then calling someone on usenet a pedo because you had a minor difference of opinion was a MILD rebuke, and manufacturing evidence was merely considered doing it properly.

This place is calm, collected and polite in comparison to almost any Usenet group back in the day. 

That job on that grinder is a total cackhander by the way.

Regards, Dan.

--- End quote ---

You join a long list of people with anger issues.

KL27x:

--- Quote ---You come here asking for help and you are rude to those you are asking?
--- End quote ---
To be fair, he didn't ask for help. He informed us how LOL it was that the ground wire wasn't even connected to the motor. This prompted unsolicited help.

Then he started a new thread (for secret reasons that might or might not be to bury this stupid mistake and the resultant noise). And the continued and redundant help followed.

Fixit, if you just acknowledged any of the 20 people trying to educate you on the other thread, this probably wouldn't happen. We all make mistakes and as long as you're still breathing, it isn't a big deal.


CJay:

--- Quote from: dmills on July 11, 2019, 06:36:01 pm ---
--- Quote from: fixit7 on July 11, 2019, 02:43:22 am ---sci.electronics.basics (A google group)

--- End quote ---
Respectful? S.E.* ??!?
Useful, yea, grant that, but no group with Phil Allison as a member could be described in those terms!

--- End quote ---

Oh hells, I'd forgotten Phil, thats a person with some serious issues, I think I had a run in or two with him, Aussie guy I seem to remember with a thing for insulting hifi people by telling them they weren't intelligent enough to understand him?

Walt  Davi(d)son and Jim Thompson come to mind as well, both great guys and hugely helpful but neither tolerate fools.

Jim is/was a great guy but for your own sanity, do not engage on politics unless you are prepared to agree with him and accept there is no other possible opinion.

Then there's PICList's own 'read the datasheet' guy, Olin Lanthrop.

EEVBlog is a fluffy, soft, warm and cosy kindergarten in comparison to usenet.

SGloefler:
I am no more than a hobby electronics guy. I am however a licensed electrician. The switch you are using is rated at 15 amps and that is higher than the 4 amp motor. However that switch was not designed to turn on and off a motor. It was designed to turn on a circuit with low draw items or outlets with devices that have their own switching, like a vacuum. But it is not rated to turn on the vacuum.
The problem is that the blade within the switch isn’t designed to deal with the initial current draw on that motor which most definitely will be over 4 amps. And because the blade doesn’t have a spec grade snap action, you can hold the switch in a position that will cause it to be almost making contact. This will do more than shorten the switch life. It becomes a fire hazard.
Tinkering and doing things on your own is fine. However there are easily obtainable correct switching that can be used that will make your home safer. This resi grade switch will arc badly every time the motor is turned on. Over time the switch will either have poor contact and need replacement as the arcing gets more noticeable or it will fuse together one day and you won’t be able to shut it off without pulling the plug. Both options could be avoided.

MarkF:

--- Quote from: SGloefler on July 12, 2019, 07:12:07 am ---I am no more than a hobby electronics guy. I am however a licensed electrician. The switch you are using is rated at 15 amps and that is higher than the 4 amp motor. However that switch was not designed to turn on and off a motor. It was designed to turn on a circuit with low draw items or outlets with devices that have their own switching, like a vacuum. But it is not rated to turn on the vacuum.
The problem is that the blade within the switch isn’t designed to deal with the initial current draw on that motor which most definitely will be over 4 amps. And because the blade doesn’t have a spec grade snap action, you can hold the switch in a position that will cause it to be almost making contact. This will do more than shorten the switch life. It becomes a fire hazard.
Tinkering and doing things on your own is fine. However there are easily obtainable correct switching that can be used that will make your home safer. This redo grade switch will arc badly every time the motor is turned on. Over time the switch will either have poor contact and need replacement as the arcing gets more noticeable or it will fuse together one day and you won’t be able to shut it off without pulling the plug. Both options could be avoided.

--- End quote ---

He actually choose a more appropriate replacement switch in one of his other three threads on this subject and didn't use it.

   (SPST) - ¾ HP 125-250 VAC
   https://www.amazon.com/Gardner-Bender-GSW-110-Electrical-Terminal/dp/B00004WLK6/ref=sr_1_36?keywords=10+amp+ac+switch&qid=1561947300&s=gateway&sr=8-36

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