Help, electric buzzing noise after centering motor coils!

[Tobbe]

PM sent to @fetteler

[Tobbe]

Problem solved, phew!
The varnish method worked. It was a bit messy but buzz is gone!
I used varnish for electronic circuit boards. It came in aerosol form so I sprayed it into a container and tried to pour it onto the coils (didn't have any small enough brushes at home, probably would have worked better). Some stuff got in the right place, most of it didn't . But I had protected the opening in the stator with tape so it didn't get there. Also plugged the bottom end with putty so the varnish wouldn't just seep through.
Unfortunately I got really messy so I couldn't handle the phone to take so many pics but here are some and before and after videos showing results.

The L75 is nice and quiet now and speed stable

Thank you guys for helping out!

Buzz before varnish method

Buzz after varnish method

[Christian Martens]

The second video has no sound... 

Congratulation!
Christian

[Tobbe]

Thanks, yes she runs really silent now

[frothy]

Brilliant, didn't hear a thing, well done.
the fun continues
frothy

[OsteSpiser]

Thanks for documenting!

 -kristian

[Tobbe]

Your welcome! And a follow up: the motor is still running quietly two months after the coil glue:-)

[sachu888]

I had the exact same issue of coil buzzing with my Elac 770 III TT. It had a PE motor, and one of the coil was making loud buzz. It was little loose in metal casing, so I placed a small thin razor blade piece coated with wood glue. It worked for approx 10 mins. It used to buzz again as soon as motor becomes hot packing get loose again. It had no issues running cold, so I removed the packing and put 2 drops of Fevi quick(instant super glue) between motor frame and coil casing. It totally cured the buzzing problem.It has been 15 days and no noise. The motor temperature remains 58 degree after running it continuously for two hours.
Here are some pics.



Regards
Sachin

[Tobbe]

Thanks for posting Sachin! Interesting find that superglue works too. Is a less messy method than pouring varnish into the housing to fix the coil buzz.

Btw my repair is still holding up fine after almost 6 months

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