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Since 1977!

Highest Precision!

Best Quality

         +
Engineering
Support!

Our engineering expertise is available
to provide
technical support
for the products
we sell; and assist
our customers
in solving
their engineering
problems.


   

 

The Fundamental  Operation of  SEL Series Rack & Pinion Linear Encoder or Resolver Measuring Systems
(navigational structure and content)

   
Page 1
Rack and Pinion Mesh Geometry

Page 2

Long Life & Trouble-free Operation

Page 3
Precision, Fine Resolution & Unlimited Length of Travel

Page 4
Integral Pinion Transducers

Page 5
Backlash Elimination

Page 6
Angular Measuring Rack Concept

Page 7
Mounting Details for Angular Rack & Pinion

Page 8
Angular Measuring Rack on G. A. Gray (Gidding & Lewis) VTM Machine

 

   



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Page 3

The Fundamental Operation...


blueribbon.gif (909 bytes)Operates in Shock and Vibration Conditions 

The Linear Encoder or Resolver Package is designed to operate in shock conditions. Specifications far exceed those of glass or magnetic scales. If fact, a glass scale will likely break under conditions approaching the upper limits of a rack and pinion specification. 

blueribbon.gif (909 bytes)Precise Operation 

Accuracy on a machine tool is dependent on the readout systemís ability to measure the actual position of the tool relative to the work piece. It is critical that the feedback device adapt to temperature changes without creating errors. 

There are two main reasons why a rack and pinion feedback measuring system creates fewer temperature related errors: 

  1. The thermal coefficient of expansion is identical to that of machinery steel. 
  2. The rack is attached directly to the machine via the channel. The rack will only change with the machine, not the air around the machine. 
  3. Being suspended in air, glass and magnetic scales are affected by air temperature not machine temperature. 

blueribbon.gif (909 bytes)Fine Resolution 

A resolution of 50 millionths of an inch (.000050") provides fine resolution for grinding applications and .0001 inch diameter increments for lathes, milling machines or any other machines. 

blueribbon.gif (909 bytes)Unlimited Length of Travel 

Due to the unique construction of the SEL Series Rack and Pinion Encoder or Resolver Measuring System Package, there is really no limitation to the length of travel. The SEL Series is accurate to +/- .0005 inches regardless of length. There is no cumulated error. 


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5143 Electric Avenue
Hillside, IL 60162
708-449-5700 (Phone)
708-449-5703 (Fax)


E-Mail: schlenkent@aol.com

 

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