Re: [CAD_CAM_EDM_DRO] encoder installation on servo drives

Tom,
I put mine on the lead screw on my mill/drill because I was uncertain
what drive ratio I might end up with. By doing that, I could change
pulleys and not worry about the settings in my controller. Has
worked fine for about two years.

Bubba

At 08:04 AM 1/4/2007, you wrote:

>I asked this on cnczone, but no replies. So...
>
>I've noticed that almost all the servo-based setups I've come across:
>1. Utilize a belt drive to connect the servo to the leadscrew.
>2. Place the encoder on the servo.
>
>I understand the reasoning for the belt drive, but wouldn't it be
>better to put the encoder on the leadscrew shaft?
>
>In other words, doesn't the belt drive add some backlash effects with
>the encoder on the servo?
>
>Or does the slop help prevent servo hunting when there's no motion?
>
>Thanks.
>
>tom