Digest for sci.electronics.repair@googlegroups.com - 5 updates in 2 topics

David Farber <farberbear.unspam@aol.com>: Sep 10 08:18AM -0700

On 9/9/2021 5:15 AM, Peter W. wrote:
> What comes immediately to mind is that there must be some sort of magnet or solenoid that engages the clutch, with 0-voltage being the 'release' (freewheeling) state. Should there be some resistance in that contact - or dirt, or a bad relay, that may be enough to cause what you describe. When everything is pristine, even a low-pressure 'grip' is enough. But a few uses, and a bit of glaze on the clutch, and you are back to slipping.
 
> Peter Wieck
> Melrose Park, PA
 
Hi Peter,
 
Regarding your clutch magnet/solenoid hypothesis, I cannot find any
electrical connections to the transmission or to the clutch and drive
system.
 
Yesterday I filled up the washer to the max and put it to the test. This
time there were no problems. There is something intermittent going on.
Eventually it will fail again and I'll remove the cover and see what
exactly that clutch disc is doing.
 
Thanks for your reply.
--
David Farber
Los Osos, CA
David Farber <farberbear.unspam@aol.com>: Sep 10 08:29AM -0700

On 9/9/2021 5:08 AM, ABLE1 wrote:
> it is not the issue.
 
> Good Luck,
 
> Les
 
Hi Les,
 
An out of balance switch wold make a lot of sense but in the past when
the machine was out of balance, it would make very loud knocking noises
when in the spin cycle and I'd have to run quickly back to the machine
to turn off the power. There was never any automatic turn off. I've read
many posts and watched many videos about Whirlpool direct drive machines
with spin failures however there was not one mention about an out of a
balance switch. If I ever locate one, I'll let you know!
 
Thanks for your reply.
--
David Farber
Los Osos, CA
bruce bowser <bruce2bowser@gmail.com>: Sep 09 10:19AM -0700

CCTV Video 3 guys Getting Electrocuted on a Steel Pole during flood
Youtube - Sep 16, 2020
-- https://www.youtube.com/watch?v=foISUIeqjy4
"Peter W." <peterwieck33@gmail.com>: Sep 09 12:03PM -0700

True story:
 
Al Rashid Mall, Al Khobar, Saudi Arabia, main sewer pumping station: This is a 800,000 square foot mall including the likes of Marks & Spencer, Victoria's Secret and so forth.
 
One evening, the pumping station clogged partially, causing it to trip the overflow alarm. Now, this is a modern station, built in 2001, with all the safety equipment, including explosion-proof lights, motors and controls, exhaust fans, methane and CO detectors and alarms and so forth - and all were determined to be functioning at the time of the incident.
 
a) Worker arrives at the manhole access, puts the alarm on silence, and removes the cover. Apparently, he silenced the panel without looking at the faults: He had also silenced the gas alarms,
b) He did not activated the exhaust fans,
c) He did, apparently, identify what he thought was the clog, as he radioed to the central station to that effect,
d) He climbed down into the pit - and was very quickly overcome by the fumes.
e) Dispatch, not hearing from him, sent another tech, who, upon reaching the pit, also went in apparently to rescue the other - and was also overcome.
f) And a third.
g) It took a supervisor from dispatch over 40 minutes to reach the pit at that point, turn on the fans, and reactivate the gas sensors.
 
Three people died. The Darwin Award people refused to use this story - for reasons not stated.
 
Peter Wieck
Melrose Park, PA
Chris K-Man <thekmanrocks@gmail.com>: Sep 09 06:06PM -0700

On Thursday, September 9, 2021 at 1:19:13 PM UTC-4, bruce bowser wrote:
> CCTV Video 3 guys Getting Electrocuted on a Steel Pole during flood
> Youtube - Sep 16, 2020
> -- https://www.youtube.com/watch?v=foISUIeqjy4
_______
 
This incident a lot more dramatic:
 
https://m.youtube.com/watch?v=vyw98flWX4Q&bpctr=1631237698&t=20s
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