Hi Bill ~ Short of securing a dial or digital micrometer to the motor frame, you can devise a quick and dirty but effective way to check for out-of-round, by securing one end of a stretched out paper clip or stiff wire under an existing screw, and bending it so the other end nearly touches the edge of the pulley or other component you suspect of being out-of-round or on a bent shaft.
Run the motor and carefully observe the distance (between the end of the wire and the pulley) opening up or closing in, or remaining steady. You can also position the wire so it points directly at the end of the pulley shaft, and then run the motor to check for a bent shaft. Positioning the wire at various points along the shaft (to the extent that the shaft is exposed), can also reveal exactly where such shaft deviates from true. Andy Baron Santa Fe On Jun 6, 2011, at 10:21 AM, William Taney wrote: > Got a question. I have a Amberola D-X that has a flutter or water sound when > playing. I have made it a new belt, it is clean lubricated and the motor runs > strong. The only thing I have to suspect is the mandrel pulley. Do those > swell or become deformed. The mandrel pulley is pot metal and appears to have > flakes, I cleaned it but am wondering if it is out of round? If you watch the > motor run the tensioner moves in and out more than I would expect leading me > to believe something is out of round or a shaft is bent... Any advice? > > Bill > > _______________________________________________ > Phono-L mailing list > http://phono-l.oldcrank.org > _______________________________________________ Phono-L mailing list http://phono-l.oldcrank.org
