Linear Encoders

A Metronics linear encoder uses a graduated scale (20 or 40 µ intervals resulting in a 5 or 10 µ display step straight off the scale) and a scanner / transducer to encode position. The sensor reads the scale in order to convert the encoded position into an analog signal, which is decoded into position by a DRO (Digital Read Out).

Advantages of the Metronics scales & DRO counters:

  • An analogue signal can be interpolated to reduce the display step by 2, 5 and 10 fold making it possible to work to closer tolerances
  • Takes care of the backlash and kinematic errors on lead screws on machine tools
  • A high standard of quality & accuracy
  • Can be adapted to most other globally known DRO systems



Linear error accuracy of the graduated glass scale 3 - 4 µ/m or better, manufactured by a world renowned optical instruments company
Reference Mark Every 25mm
Resolution / Display Step Directly off the scale: 5 or 10µ Interpolated: 0.5,1 or 2µ
Standard linear encoder measuring length (mm)

120, 170, 220, 270, 320, 370, 420, 520, 570, 620, 720, 770, 820, 920, 1020, 1140, 1240, 1340, 1440, 1540, 1640, 1840, 2040, 2240, 2340, 2440, 2640, 2840, 3040, 3140.

Special lengths can also be supplied on request.
For economic purposes, scales with partly graduated glass & filler pieces are also available.

Equipment Dimensions

Scanner mounting foot (mm) L80 x H21 x W22
linear encoder profile dimensions (mm) H37 x W22 x L(Standard measuring length + 115mm)
Transducer Cable Lengths Standard: 3m, with or without plastic covered steel conduit

Scanner Power Requirement / Output Signals

Scanner Supply Voltage 5VDC (60-120mA)
Scanner Output Signals 2 sinewave signals (90° out of phase) plus one reference output signal

For further technical information, please contact us