Governor flywheel friction surface cleaned of ALL old residue, polished, and 
fresh oil on the leather friction pads? Also, look closely at the flywheel as 
it spins to verify that your screw loosening/tightening on the weight springs 
indeed yielded the desired result. Run the motor as slowly as it will run when 
making this observation, if there’s any doubt. The slower speed will more 
readily reveal eccentricities. Check also for your problem at various tensions 
of the mainspring — is it just as bad across the board, or more noticeable when 
more fully wound or more relaxed? Deviations here would point to mainspring 
coils sticking together, despite your observations. A mainspring under tension, 
where the turns of its coils bear hard one upon the other, will exhibit 
different behavior than what you can observe in a static test. It may be 
necessary to do a thorough cleaning of the spring out of the barrel, as well as 
the barrel muck itself, followed by a reinstall with appropriate new lubricant. 
The most perfect regulating system (governor setup) won’t iron out uneven 
delivery of power to the governor and turntable platter. The underlying fault 
will be somewhat muted by the turntable platter’s flywheel effect, so it is 
likely more pronounced than it would seem with the platter on the spindle, and 
may be easier to pin down with the platter removed. You’re already doing all 
the right things by being observant and dealing with the visible issues, now 
look more closely for the subtler ones. There are other possible causes beyond 
what I’ve outlined above, but it’s best to check for these issues first.

Best of luck and keep us posted.

Andrew Baron
Alpine Clock Repair, LLC
Santa Fe

> On Dec 20, 2019, at 9:08 AM, Ron L'Herault via Phono-L <> 
> wrote:
> If anyone is still here on the mailing list(s)  What is your take on the 
> situation?  Problem: Edison Diamond Disc single spring motor does not keep a 
> constant speed. Spring does not seem to be caked with grease, judging from 
> the several inner coils one can pull out without having the whole spring out. 
> A small amount of grease was added. Old grease under the bull gear plate was 
> removed and fresh grease added. Governor screws have been loosened, and 
> tightened after the governor has spun around for a while. bearing points are 
> well oiled, gears lightly greased. Solution(s)?
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