Help- Need advice on finding an electric motor

[bmenary]

Hi All- I need help/advice on finding the right electric motor- I am building a simple recored album cleaning machine. The platter and spindle weigh 1 pound 7 ounces. I would prefer a direct drive type that I can use the spindle I have on the shaft of the motor- so the motor shaft needs to be vertical- most important it needs enough torque to turn the 1.7LB platter and additional weight of the vacuum apparatus on the record- It will need to spin at 15-20RPM- I understand I will need some type of controller for the speed- Oh, and did I mention I am trying to keep my costs down- :-/ Would love to hear someone has a used motor I could buy cheap-

Any ideas? Thanks for your time and help- Barry Menary, Wilmette, IL

[dchisholm]

It's not clear whether you are looking for a motor that turns at "some speed in the 15 RPM - 20 RPM range", or "a motor whose speed can be accurately varied between 15 and 20 RPM".

In either case, that's a pretty slow speed for a traditional motor without step-down gearing. Many years ago, the "Slo-Syn" (brand name) line of synchronous motors were used in some industrial control applications where slow speeds were required.. (I saw them in satellite antenna positioning drives.) I don't know if they are still made, but that brand name might be enough information to start searching among surplus and salvage dealers.

Dale

[godfrey]

For that kind of speed, I'd look to kitchen appliances; rotisserie, microwave, juice extractor etc.

[Enzo]

Find an old record player/turntable with 16rpm speed. Adapt the mechanism for your use.

Is there something your machine will do at 16rpm that it couldn;t do at 33 rpm? WHich again just suggests using an existing turntable mechanism.


If you are spinning the record, why must the vacuum aparatus spin too? WOuldn;t that result in it sitting over the same spot on the record? If the vacuum is not spinning, then why would the platter and motor have to support its weight?

Since this is a cleaner, not a player, I can;t imagine the speed needs to be regulated. So what is the reason for the large platter? ANything that grips the record through the hole should work for spinning.

Commercial record cleaners exist in the market already, They stand the record disc vertically. Takes up a lot less room.

[pixpop]

You could look at windshield wiper motors. They often show up as surplus items. They have massive torque, and will run forever. 12 Volts, obviously. They are also fairly quiet.

[Jsixis]

Find a DC motor and you can build a pulse modulation controller to make it go what ever speed you want.

[RJM1]

You could use a stepper motor.