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Reflected Inertia of Slide Table Driven by Rack & Pinion

Reflected Inertia of Slide Table Driven by Rack & Pinion

Reflected Inertia of Slide Table Driven by Rack & Pinion

(OP)
How do you calculate the reflected inertia for a slide table driven by a rack and pinion?  Is it similar to a ball screw drive, replacing the lead of the ball screw with the pitch circumference of the pinion?

RE: Reflected Inertia of Slide Table Driven by Rack & Pinion

A rack & pinion is a tangential drive just like a belt and pulley. It uses the same formuals.

           Wr^2
Jpinion = ------
            2g

J = Inertia (lb-in-sec^2)
W = weight of pinion (lbs)
r = pinion radius (in.)
g = gravity (386 in/sec^2)

To calculate the Inertia of the load:

         Wr^2
Jload = -------
           g

J = Inertia (lb-in-sec^2)
W = weight of load (lbs)
r = pinion radius (in.)
g = gravity (386 in/sec^2)

Hope this is what your looking for.

Cameron Anderson - Sales & Applications Engineer
Aerotech, Inc. - www.aerotech.com

"Dedicated to the Science of Motion"

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