Question about motors and voltages

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Old 07-03-20, 07:46 AM
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Question about motors and voltages

Hello,

I am working on a project that will require creating a motorized lazy susan. I found videos showing how to do this using a microwave oven motor, but all of the microwave oven motors I have found are either 220v or AC21v. Can either of these motors be used with 120v? Most of the motors I've seen are 4 watts.

Thank you.
 
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Old 07-03-20, 08:24 AM
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https://www.amazon.com/Panasonic-F63.../dp/B001EY958O

https://www.amazon.com/Synchronous-T...26&s=hi&sr=1-4

Here are120V motors.

Search for syncronous motor, you will find various speed and voltages.
 
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Old 07-03-20, 09:19 AM
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Welcome to the forums.

The motors for microwave oven turntables are not very strong.
Will they be strong enough to do your job ?
 
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Old 07-03-20, 09:48 AM
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Hi Pete,

The videos I saw were demonstrated with considerably more weight than I plan to use. I want to put a plant on it and have it rotate slowly so that the sunlight is more distributed. I find it interesting how plants bend and move to get the best sunlight, and am curious how a plant will react to this type of rotation.

Thank you.
 
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Old 07-03-20, 09:52 AM
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In a microwave oven application..... the platform that turns is sitting on a "ball bearing" type raceway so that it is balanced and spins easy. If you can maintain that it should be fine.
 
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Old 07-03-20, 09:52 AM
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Hi Lambition,

Thank you for the examples. The best option I found was for a cup holder that ran at 1rpm, but since the videos I saw all used microwave motors I wasn't sure if the cup holders were strong enough for my needs. I want to put a plant on it and have it rotate slowly. The microwave motor in your first link runs at 5rpm. Is there a way to add a speed control?

Correction: It was a turntable motor. Here's a link: Turntable motor

Thank you.
 

Last edited by bhrbhr; 07-03-20 at 10:02 AM. Reason: Mistake in text
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Old 07-03-20, 12:05 PM
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Seems like you're re-inventing the 1,500 AD Tudor English gravity powered "spit jack" or "bottle jack" which was developed to evenly cook meat in front of a fire by using gravity to drive a rotisserie motion over several hours. A bottle jack works on gravity and clockwork cogs.

A simple lego-gear-reduction-chain, fan blades, and a spindle should allow you to construct a slowly turned-by-gravity gadget that rotates the plant as it drops down a rope.
If you get a looped rope/cord, then you should be able to do the spinning plant just based on clockwork and gravity.













 
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Old 07-03-20, 01:30 PM
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Ummm, spinning roasted meat. I think I need to go grocery shopping.
 
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Old 07-03-20, 02:51 PM
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There really isn't a easy way to control synchronous motors. You can control speed by changing frequency, but I doubt small motors like that will have enough torque at lower speed.
Turntable synchronous motors speeds are set at the factory using gears instead.
 
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Old 07-03-20, 07:15 PM
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The best thing to is to get a timer that supplies power to the motor for xx seconds several times a day or once a day. There are hundreds of timers on ebay. The one in the link allows 16 settings per day but the interval is at least 1 minute. Look for one that runs on 120v and has multiple settings per day with a 1 second minimum.

Timer example
 
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Old 07-12-20, 05:40 AM
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FYI I have a planter full of herbs on a deep windowsill, to keep the herbs from growing in one direction, I set the planter on the rotating glass plate and 3 wheeled bearing salvaged from an old microwave oven.

The microwave turntable is easy to spin, just turn it an eighth turn each day when you water it.
 
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