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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)

   
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 7

  

The Fundamental Operation ...


Rack & Pinion Orientation
for Backlash Elimination


Angular_Meas.gif (8665 bytes)

The movement of the rack is recorded by a pinion, which drives a resolver/encoder (see fig.1). This is a non-contact system at the point of converting a mechanical motion into an electronic position signal. In any non-contacting measuring system a precision air gap must be maintained between the moving member and the sensors.

Our gap is within the rotating transducer and accurately maintained by high quality bearings (see fig. 2)


Collimator_Assy.gif (7003 bytes)

 

It is easier to maintain closer tolerances with instrument size components with small ABEC 7 ball bearings than a large machine member with large bearings.

The point of mechanical contact is where the pinion meshes with the rack pitch line. This mesh is controlled by the unique flex plate mounting for encoder or resolver to less than one (1) pound of force thus providing zero backlash (0.00010" repeatability) and low reading errors with up to 0.010" misalignment between fixed and moving members of the machine yet negligible rack to pinion wear.


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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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