Re: [CAD_CAM_EDM_DRO] Servo Motors

Green, James wrote:

>These servo motors have the USdigital 250 cpr encoder attached.
>
>430 oz/in servo motors are $150.00 each plus $7.00 each shipping in the
>USA.
>
>360 oz/in servo motors are $100.00 each plus $7.00 each shipping in the
>USA.
>
>http://www.homecnc.info/cnc-main.html
>
>I purchased these motors for my X3 milling machine......
>
>James
>
>

One thing to note - those torque ratings are peak, not continuous. Most
servos have a continuous rating that's roughly 1/4 - 1/5 the peak, so
those 430 oz-in motors are probably 85-110 oz-in continuous.

That may be enough for your application, but you should be careful to
compare apples to apples when looking at these motors.

I believe that "best practice" is to design based on the continuous
torque, and realize that there is a reserve above that which can be used
occasionally to get through a tough spot.

- Steve