Re: fanuc ac servo motor

jon this is the info on the sticker that is attached to the motors
they are all 4 the same

model 5s
type a06b-0314-b031
3 phase
8 poles
2000 rpm
volt 126
trq (stall) 5.9
amp (stall)5.8
pulse coder
excit perm magnet

--- In CAD_CAM_EDM_DRO@yahoogroups.com, Jon Elson <elson@p...> wrote:
> riverwind1962 wrote:
>
> >does anyone know what hardware is req to use fanuc ac servo
motors i
> >have aquired 4 of them and they look good any ideas
> >
> >
> Most of the "big name" servo drives are proprietary. They use
some odd
> combination of encoder signals to provide commutation as well as
encoder
> position info. The scheme is such that they can either tell the
correct
> phases
> to drive totally statically, or they can determine the correct
commutation
> by moving the motor only a couple of encoder counts in any
direction.
> This makes it very hard to mix and match drives and motors.
>
> The generic motors/drives usually use a standard quadrature
encoder and
> separate commutation signals with 3 tracks. These are often
identified as
> "hall sensors" although in many cases they are provided by
additional tracks
> on an optical encoder.
>
> The motor itself is probably a 3-phase "brushless" permanent-
magnet motor.
> There is some confusion due to the original misuse of the
term "brushless
> DC motor" in this application. Those fans in PC's and such used
the same
> designaltion, but it was essentially correct, as the entire
commutation
> system
> was built inside the motor. The servo motors were misnamed,
because the
> commutation was NOT in the motor, but in the drive. A more
correct term
> would have been "permanent-magnet brushless motor" or "synchronous
AC
> motor".
>
> You need to determine if these are permanent-magnet or induction
servo
> motors. An easy test is to connect a voltmeter to any two of the
motor
> leads and rotate the motor. If you get tens of volts out when
turning it by
> hand, it is most likely a permanent-magnet motor. If you get very
little
> voltage out, it is most likely induction. It takes a different
drive design
> to drive the two types.
>
> Jon