Re: Brake or tachogenerator?

["Darrell" <dgehlsen-at-earthlink.net>]

If it is a brake, it should be locked up with no power. That is the usual
failsafe arrangement so if you loose power, it stops.
How many leads does the small end have?
Darrell

http://www.machinemaster.com


----- Original Message -----
From: "Erich Müller" <emcuser-at-gonzales.swb.de>
To: "Multiple recipients of list" <emc-at-nist.gov>
Sent: Friday, December 21, 2001 2:32 PM
Subject: Brake or tachogenerator?


>
> Hello,
>
> got a stepper motor that has bolted to its rear axle a part that has a
> commutator and looks like a permanent magnet motor. Not as big as the
> stepper still substantioal in size(maybe 1/3 of the size of the Stepper)
> Is this a tacho generator or brake or what else could it be? What use
> would a stepper and DC-motor or tacho generator/stepper combo have? Fast
> homeing?  Or is it just a brake/locking device for the axle? The label
> does not give any info about the usage of the bolted on component even
> though the rotor of the stepper and DC-motor (if it is one) share the same
> axle.
>
> Thanks,
> Erich
>
>
>
>