Society of Robots - Robot Forum

Electronics => Electronics => Topic started by: wrinkles on April 14, 2011, 02:37:16 PM

Title: Identify Motor
Post by: wrinkles on April 14, 2011, 02:37:16 PM

I got this motor from a Xerox 8550. It's the Y-axis motor. I can't seem to find any specs for it. When I put a 9v DC voltage to it it twitches, I change it to AC and it does the same. It seems like it's vibrating but I see the shaft twitching back and forth.

Any ideas. I'm wanting to add this motor to a turntable that will need to turn at about 4rpm.


(http://img641.imageshack.us/img641/5319/motorq.jpg) (http://img641.imageshack.us/i/motorq.jpg/)

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Title: Re: Identify Motor
Post by: BANE on April 14, 2011, 05:53:05 PM

Quote

I change it to AC and it does the same.

ive taken apart similar things and the motors are always DC.  personally, for a y-axis, id put money on DC because you would need direction control and speed control. 

 

Quote

9v DC voltage to it it twitches

My guess would be closer to 24-30v for a motor this size. 


the easiest method would be to power up the machine and use a muiltimeter on the motor pin out and try to jog the motor.  Also, take a look at the transformers voltage out put.  it will probably be something like 120v AC 1amp (in) and 30v DC 4amps.

cheers!

Title: Re: Identify Motor
Post by: knossos on April 14, 2011, 06:23:57 PM

Its a 12 or 24v motor.  If you look at the Buehler motor webpage (http://www.buehlermotor.com/C12572C600247071/CurrentBaseLink/N272JA6K485KSTREN), although not directly listed, you can see the options for motors they offer.

It looks like its a 1.13.054.xxx series motor.  Here is the datasheet (http://www.buehlermotor.com/C12572D40025EAF8/vwContentByKey/W274AHF5391WEBREN/$FILE/DC-motor-1_13_054_en.pdf).

It does not list the specific motor, but I would assume the specs are comparable.  When you hooked it up to 9VDC what were you using as a power source?  It looks like these can draw a decent amount of amps.

Also to drive a turntable at about 4 rpm, you will have to gear down substantially, it looks like it runs about 3000 rpm.

Title: Re: Identify Motor
Post by: wrinkles on April 14, 2011, 06:47:46 PM

Thanks for all the info. I'll have to look at the power supply for the printer to see what the power output is.
I was using a 9v 800ma power supply I also tried a 12 8ma power supply with the same results. I stripped a couple of stepper motors from the printer, I just didn't want to build a driver circuit for one of those. Might end up having to do that.

Title: Re: Identify Motor
Post by: wrinkles on April 14, 2011, 06:58:09 PM

Thanks again. I tried a 21v 400ma power supply and the motor function perfectly. Knossos you were right the rpm are pretty high. Guess the stepper motor is my next choice.

Title: Re: Identify Motor
Post by: Soeren on April 15, 2011, 09:23:41 PM

Hi,

Industrial copiers (large office machines that weighs in at around 100lb or more) is always run on 24V (to keep currents down).

Usually the motors (whether DC or steppers) found in such devices won't be very usable for small robots, unless you find a particular fine specimen that would justify building a boost circuit, but that is rare, given the added complexity.

But put them aside for something else - one of them might be good for eg. a generator for a Savonius wind mill, or perhaps some stationary application.

For a 4 RPM turntable, a small motor with a couple of worm gears should do.