Re: [CAD_CAM_EDM_DRO] motor types

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