I had a couple of things that brought about this thread. It is surprising, to me, of the little subtle signals that one can receive while turning. The first came from putting a piece of cherry on the lathe; made sure the wood was solid in the tailstock and the drive spur. I set the banjo and tool rest and then started turning. When I started turning, I noticed a growling noise, even with ear plugs! My wife was upstairs and so it wasn't her. I stopped the lathe and tried to determine the problem. I loosened the live center a hair and that cured the problem. Probably, saved some bearings, too.
The second thing that popped up was on the low speed grinder. I put the roughing gouge on the Wolverine jig, and put the edge on the fine wheel. As long as I had the tip on the wheel, it was OK. When I turned the gouge to touch up the wings, it would start bouncing! I knew something wasn't right. So, I looked at the wheel and found it had a groove down the middle. I got the diamond tool and started to true/square the wheel. Problem solved!
The second thing that popped up was on the low speed grinder. I put the roughing gouge on the Wolverine jig, and put the edge on the fine wheel. As long as I had the tip on the wheel, it was OK. When I turned the gouge to touch up the wings, it would start bouncing! I knew something wasn't right. So, I looked at the wheel and found it had a groove down the middle. I got the diamond tool and started to true/square the wheel. Problem solved!