Ouch, something cheaper and reliable?
EDIT: what do you say about something like this one? Philips AC Synchronous motor 24V, 250RPM, turntables Systemdek,Rega,Linn,Thorens | eBay
I use two pulleys, one for 45rpm and one for 33rpm, and it should be enough. Right?
EDIT: what do you say about something like this one? Philips AC Synchronous motor 24V, 250RPM, turntables Systemdek,Rega,Linn,Thorens | eBay
I use two pulleys, one for 45rpm and one for 33rpm, and it should be enough. Right?
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"What about the motor from an old floppy disc drive?"
5,25' old floppy disc drive I used for a diy Gyrodec tt. No problem with torque at all - starts like a hare and pulls like a bull (original Gyro disc). The only problem is the casing for floppy, needs some imagination to design it.
5,25' old floppy disc drive I used for a diy Gyrodec tt. No problem with torque at all - starts like a hare and pulls like a bull (original Gyro disc). The only problem is the casing for floppy, needs some imagination to design it.
This looks like an excellent choice. It requires a capacator. The corect value is on the chart. Being 24V can be an asset. It should be easier to build a 24V variable frequency power supply for speed control than one for mains voltage. Make sure you use a large enough transformer or torque will suffer. This is a perminant magnet motor, much like a stepper motor. Like a stepper there is a little bump every time a rotor pole passes a stator pole. Even though the motor may sound silent it does vibrate. Make sure the motor is isolated. I don't mean to scare you away. This is pretty much the standard turntable motor these days and has been since the introduction of belt drive. Older turntables used smoother motors but ran at much higher speed. They traded vibration for more audible noise from the high RPM and the wind it generates, also balancing is more critical at high RPM. A high RPM motor is impractical for a simple belt drive. The platter pulley would have to be huge and the motor pulley tiny. In the old days they solved this with idler drive which could transfer motion from a small motor shaft to the inside wall of the platter giving them an effective 30cm pulley.
High speed motor belt drive.
Hmm. I guess it is done. This also shows a doable way to make the belt shift from the 33 1/3 RPM to 45.
Hmm. I guess it is done. This also shows a doable way to make the belt shift from the 33 1/3 RPM to 45.
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