Edison Motor Thumping

[Energ15]

I have recently noticed that, when I play a record on my Edison Standard model A that there is a thumping coming from inside the case. I checked the governor weights and they are not loose and I oiled almost everything including the main spring. I turned it on after oiling it and it still has the terrible constant thumping noise. Can anyone tell me the cause of this thumping? It hasn't done it before and it seems to do it most when you have just cranked it up. People have told me that it is just the spring slipping but, like I said, I oiled the spring over and over. Help!

[gramophoneshane]

The main spring is the only thing I can think of that would produce an irregular thumping noise. Anything else would be a regular click or tick
Has the main spring been removed from the barrel, & the spring & barrel properly cleaned?
Adding oil to old dried up grease probably wouldn't do much except make the grease into a tacky mess.
Even if you clean them, but leave a spot or two of old grease on a spring, those spots will become like glue & stop the coils moving against each other evenly, and as they release & thump will result.

[Brad]

I would open the case and run the motor and see if you can visually correlate the thumping to anything spinning. Sometimes the element that goes bump in the night will do it at the same point in its rotation. I have found several problems this way.

If that doesn't work, shoot and post a video of the motor running. Someone on the board has probably heard some thing similar before.