I have an Edison Home A that has a warble that is really noticeable on long notes. I wanted to attach a short video, but even a 2 second one says the file is too big. This does have the 2/4 minute conversion and the belt pulley on top appears warped. Is this what would cause the fluctuation? Thanks,
Do you have a channel on YouTube, or some other video hosting site? You could post it there, and put a link in a comment here.
How fast is this "warble"? Does it match the rotation of the cylinder, or is it faster? I would first suspect the governor: check for loose springs or weights, bad spring adjustment, worn bearings, or possibly even a warped disc.
You might also check the belt tensioner, to see whether that is working properly.
Also, if I try to get the speed that slow, it will drag to a stop, so the problem might be in the speed control. I am not sure of the mechanics of the speed control. I think I hear the mainspring thumping some as well.
Could the felt be worn on the speed control? Otherwise, you might try repositioning the governor on its shaft.
If you're getting thumping from the spring, that means the grease is dried out. You'll have to have the spring cleaned and regreased. If you've never tackled a mainspring before, it might be a good idea to send the spring barrel out to a professional for service: while you're waiting, it's always good to clean and re-lubricate the rest of the motor as well. I would heartily recommend getting a copy of "The Compleat Talking Machine", by Eric L. Reiss: it is an indispensable book for any collector and restorer.
Last Edit: May 9, 2021 20:29:35 GMT -5 by lucius1958
I will look for the book. There is a restorer who lives close to me in SC that I actually bought it from (unrestored). He heard the spring give an "unfurling " sound and sprayed it with some white lithium grease but it wasn't thumping then. I will ask him about cleaning and greasing the spring. He didn't say the govenors were bad so it may be just the speed control felt. Thanks a lot!
You most likely (more than likely) have a Bad/Worn Mainspring..That usually causes a speed issue causing warble. It will most likely need replacement in 85% of the cases of this nature I have found in fixing machines found in the wild. Other things that you can try is to make sure that the Leather belt is not on too tight and that the machine is well lubricated with sewing machine oil. Always make sure before anything that you have a good working reproducer and that your cylinder is in excellent condition and free of any dirt before repairing any machine as well. Tony K., Edison Collector/Restorer