Newsgroups: comp.robotics
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From: nagle@netcom.com (John Nagle)
Subject: Re: more info about servo motor(problem) 
Message-ID: <nagleCDAyHA.Lvy@netcom.com>
Organization: NETCOM On-line Communication Services (408 241-9760 guest)
References: <CCsD39.H8J@noose.ecn.purdue.edu> <747586364snz@mertec.demon.co.uk>
Date: Mon, 13 Sep 1993 17:12:44 GMT
Lines: 32

dave@mertec.demon.co.uk (Dave Mclaughlin) writes:
>In article <CCsD39.H8J@noose.ecn.purdue.edu> ottomane@schenectady.ecn.purdue.edu writes
>> o.k. a lot of people have said that more info from the
>>back of the motor would be useful in helping me out.
>>
>>                        SLO-SYN
>>                     DRIVING MOTOR
>>           Type: HS50     Spec:(blank) 
>>              3 V.    4.0 A.      D.C.  CY.
>>                 Torque: 85 Oz.In.
>>                 RPM (blank) @ 60 CY.
>>            Temp Rise 75 C -Class B insul.
>>    
>>         The Superior Electric Company
>>            Bristol, Conn., U.S.A.
>>
>>U.S. PAT 2,931,929,2,982,872  Canada Pat 1962

       You have a "slo-syn".  Congratulations.  This is a predecessor
to modern stepping motors, and was intended as an alternative to selsyns.
"Slo-Syn" motors are sort of like steppers, but they are available in
much larger ratings.  They're still sold.  Look in industrial automation
magazines like "Machine Design" for ads for them and their drive electronics.
They're driven something like steppers, but you have to ramp up the step
rate, because these are high-inertia devices.  I think there's some feedback
from the motor to the controller, too.

       This is a fairly exotic device.  If you just want a stepper, you
can get one for a few bucks at most electronic surplus houses, or take
one out of an older disk drive.  Small steppers are easy to drive.

					John Nagle
