What in the world could cause this to spin the record faster than 45 rpm? It can't be the idler wheel since it's a single one. The motor is marked 115V 60 Cycle. There is no tape or anything on the motor shaft. While it was spinning I lightly put a file on the shaft to clean off anything that could have been put on it to speed it up.
The inside of the "flywheel" is clean.
There was a wire holding the one part of the motor upwards, the area where the rubber mount was failing and sagging worse than the others. They have been replaced and the motor is straight up and down.
The motor shaft is in contact with the idler wheel properly, not near touching the larger diameter part of it.
I don't get it. It's close to 48rpm. Funny how easy it is to hear a difference of 3 rpm, very easy! And yes I've checked it with a strobe disk and it shows that it's fast.
If I can find the right kind of phone app to measure the motor's rpm, what should it's speed be, anyone know?
Either the motor shaft diameter is too big or the inside diameter of the flywheel is too small. Lots of mistakes make it through final inspection in factory work... On Tuesday, August 5, 2025 at 04:09:11 PM EDT, Tony Miklos via Jukebox-list jukebox-list@lists.netlojix.com wrote:
What in the world could cause this to spin the record faster than 45 rpm? It can't be the idler wheel since it's a single one. The motor is marked 115V 60 Cycle. There is no tape or anything on the motor shaft. While it was spinning I lightly put a file on the shaft to clean off anything that could have been put on it to speed it up.
The inside of the "flywheel" is clean.
There was a wire holding the one part of the motor upwards, the area where the rubber mount was failing and sagging worse than the others. They have been replaced and the motor is straight up and down.
The motor shaft is in contact with the idler wheel properly, not near touching the larger diameter part of it.
I don't get it. It's close to 48rpm. Funny how easy it is to hear a difference of 3 rpm, very easy! And yes I've checked it with a strobe disk and it shows that it's fast.
If I can find the right kind of phone app to measure the motor's rpm, what should it's speed be, anyone know?
I hated to do it, but I filed the motor. It's just right now.
On 8/6/2025 8:42 PM, JIM & LAURIE DIRKSEN wrote:
Either the motor shaft diameter is too big or the inside diameter of the flywheel is too small. Lots of mistakes make it through final inspection in factory work...
On Tuesday, August 5, 2025 at 04:09:11 PM EDT, Tony Miklos via Jukebox- list jukebox-list@lists.netlojix.com wrote:
What in the world could cause this to spin the record faster than 45 rpm? It can't be the idler wheel since it's a single one. The motor is marked 115V 60 Cycle. There is no tape or anything on the motor shaft. While it was spinning I lightly put a file on the shaft to clean off anything that could have been put on it to speed it up.
The inside of the "flywheel" is clean.
There was a wire holding the one part of the motor upwards, the area where the rubber mount was failing and sagging worse than the others. They have been replaced and the motor is straight up and down.
The motor shaft is in contact with the idler wheel properly, not near touching the larger diameter part of it.
I don't get it. It's close to 48rpm. Funny how easy it is to hear a difference of 3 rpm, very easy! And yes I've checked it with a strobe disk and it shows that it's fast.
If I can find the right kind of phone app to measure the motor's rpm, what should it's speed be, anyone know?
-- Tony Miklos Tony's Jukebox Repair
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