Re: [CAD_CAM_EDM_DRO] Chain drive question????

At 08:01 PM 7/16/02 -0000, you wrote:

>I'm building a cnc gantry table to use with a plasma torch and I'm
>considering using a stepper motor with a chain drive, however I was
>wondering if it was accurate enough???

Chains do not convert uniform rotary movement into uniform linear movement.
The problem is worse with smaller sprockets. Use Berg's cable belt system
to drive the axes; it has a contant pitchline which sprockets do not. BTW,
you can put both X and Y drives on the base plate ad not have to piggy-back
one of them. I'll provide details of the cable and drive layout for that if
you like.

Regards, Hoyt


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