Re: [CAD_CAM_EDM_DRO] motor types

Weyland, look closely along the armature for anything other than bearings.
The armature will only join to bearings if it's a normal motor. The weird
pattern you see is almost certainly just the windings. They are wrapped
around a laminated core pattern on a few motors I've taken apart to limit
induced eddy currents in the former they are wrapped on (Like in a
transformer). The encoder, as I've found out this week, for most CNC type
servos is a round disc. The disc is on the rotor and as the rotor turns so
does the disc. There are detectors by this disc that send each time the
signal is broken and started, creating pulses, the coding. Check what the
little PCB actually attaches to except those wires, does it have any others
leading off it?

John

> Y'know, I was thinking about the definitions of a servo
> just now, and decided to take aprt that 5-wire unknown motor.
>
> Inside, it has two large, almost half circle magnets
> that *appear* to be epoxied to the housing (casing).
> On the shaft (armature?) is a bunch of wire wound in patterns
> around and thru some sort of cylindrical grid (for lack of a better
> description).
> This "grid" may or may not be metal.
> There are two wires going into the motor.
> The remaining 3 wires go to the *outside*
> of the motor, leading to a round, what appears to be PCB.
>
> Could this be a servo?
> Could that be an encoder?
> How many wires is typical for an encoder?
> Is it possible for a servo to only have 2 wires?
> Are there color conventions on wiring servos?
>
> The wires to the motor are colored brown and purple.
> The wires to the (possible) encoder are colored red, yellow, and blue.
>
> Any motor gurus out there?
> If it *is* a servo, I'd like to entertain the idea of using this for the
> mill.
>
> Thanks.
>
> Weyland
>
>
>
> Addresses:
> FAQ: http://www.ktmarketing.com/faq.html
> FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
>
> Post messages: CAD_CAM_EDM_DRO@yahoogroups.com
> Subscribe: CAD_CAM_EDM_DRO-subscribe@yahoogroups.com
> Unsubscribe: CAD_CAM_EDM_DRO-unsubscribe@yahoogroups.com
> List owner: CAD_CAM_EDM_DRO-owner@yahoogroups.com, wanliker@...
> Moderator: jmelson@... timg@... [Moderator]
> URL to this page: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
> bill,
> List Manager
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>