lathe VS modulation
I just bought a used Jet 1642 and I noticed that when I was running about 1275 rpm it will modulate up to 1600+ rpm and then back down again. I don't know if it does it at other speeds yet. I applied belt dressing to the drive belt and that seemed to stop it for a while, although I didn't really think slippage was the problem. The lathe is in excellent condition and I bought it from a reputable person. Is this a common problem? Anybody know what to do about it? It doesn't happen often, but I just don't think it should happen at all. Any help would be appreciated.