Re: [CAD_CAM_EDM_DRO] AC servo motor project - encoder problems

Keith Clark wrote:

>Thank you Jon,
>
>I appreciate your insight! I see in the Yaskawa manual that there are
>encoders from
>Yaskawa that only have outputs from channels A and B with channel Z (1
>ppr) on the "C" channel
>just like my motor so I assume these are meant to be used with a
>different amp.
>

Right, those motors are designed for use with other maker's drives.
Yaskawa may
also make drives for use with generic motors. Those would have the
inputs for
the hall-effect sensors.

> I
>believe the C channel on the functioning motor has commutation information.
>
>
>

Yes, exactly. All their SGMx motors (I think that's the right
designation) use the
same scheme.

>Unfortunately, I can not find a motor that matches the damaged one. I
>have found another
>motor that I can purchase with the same encoder but it is 1.0 hp instead
>of 0.6 hp. My amp
>is rated for the 0.6 hp but I was hoping to limit the current with
>inductors.
>

Inductors will not limit current. The DRIVE limits the current
automatically.
There should be no problem going with the bigger motor, although you
will only
get the torque the drive/motor combination is rated for.

Jon