I'm trying to fix an Edison Standard model D and it is giving me fits. It has the top carriage and diamond B reproducer, and the 2-4 min gearing. It had a swollen pot metal bearing which I replaced without difficulty. However, I discovered other problems. There was a lot of vibration. The shock absorber spring on the governor was broken so the governor was made into a fixed end type. And I believe it had the wrong governor springs on it. They were a heavy, pre-bent form. I put a set of lighter, straight springs on. That cured the vibration but the last problem remains. It slows down about half way through a cylinder. I replaced the belt, using a thin supple leather. Everything seems to turn/slide freely. I've altered the tension on the half nut spring, all to no avail. I even swapped the spring out with another I had. NO change. So, what am I missing/doing wrong here?
Ron.
