H. Kuhnke Ltd, Romsey, UK
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Encoder Basics

The data sheets listed in this part of The Encoder Company website will be useful to the student of encoder technology and to both installers and operators.

Maximum Speed

The maximum speed of an encoder is derived from (1) The mechanically possible rpm, (2) the minimum permissible pulse-edge spacing of the square wave output of the encoder and (3) the functional speed which is limited by the pulse frequency.

In some Hengstler encoder data sheets a maximum "continuous" speed is often quoted, with a higher "short term" rating that could be 20% higher. This is governed by the mechanics of bearings and the subsequent generation of heat. The control circuitry is also critical as it has to be able to receive (i.e. count) the signals generated by the encoder.
Maximum Speeds PDF - 492Kb

Output Signals of Incremental Encoders

This useful data sheet describes how Hengstler Incremental Encoders generate output signals.
Output Signals PDF - 552Kb

 

Examples of Encoder Flange Mountings

This useful 3 page guide shows the differences between synchro, clamping, square and pilot flanges. The flexible couplings and adapters shown in these illustrations can be identified by part number shown in the products-accessories section of the Encoder Company website.
Encoder Flange Mountings PDF - 776Kb

Encoder Outputs

This 5 page download describes the basics of "RS422 TTL", "Push-Pull", "Push-Pull Complementary", "Alarms" and "sense at 5V RS422(T)" when used with Hengstler Rotary Encoders from The Encoder Company. Reference is made to particular model numbers and code letters used to make up full part numbers. Definitions of most of the terms used can be found in the Technical Glossary section of this site.
Encoder Outputs PDF - 552Kb