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Author Topic: Linear Encoders  (Read 3088 times)

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Linear Encoders
« on: February 04, 2007, 09:55:30 PM »
Can someone provide a discussion as to the pros and cons of using linear rather than rotary encoders on a machine which will be using Mach?
I have an Italian machine which already has glass scale encoders and servos and would like to make use of them rather than having to special mount rotary encoders.

Offline Chip

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Re: Linear Encoders
« Reply #1 on: February 04, 2007, 11:02:28 PM »

Rotary encoders are mostly on the servo, no backlash, liner encoders can cause the servo to hunt back and forth depending on your

backlash between table/encoder and servo.

You'll find them used both ways.

Hope this Helps, Chip
Re: Linear Encoders
« Reply #2 on: February 07, 2007, 11:48:56 PM »
I opted to mount the encoders  directly to my ball screws.  I have 3:1 timing pulllys between servos and ballscrews. Appart from  some slight singing of the motors every thing works fine.