November 2010
Angle Encoders with Integral Bearing
Information on
Absolute Angle Encoders with Optimized •
Scanning
Angle Encoders without Integral Bearing •
Rotary Encoders
•
Encoders for Servo Drives
•
Exposed Linear Encoders
•
Linear Encoders for Numerically •
Controlled Machine T ools Interface Electronics
•
HEIDENHAIN controls
•
is available on request as well as on the Internet at www.heidenhain.de.
This catalog supersedes all previous
editions, which thereby become invalid.
The basis for ordering from HEIDENHAIN
is always the catalog edition valid when
the contract is made.
Standards (ISO, EN, etc.) apply only
where explicitly stated in the catalog. Angle encoders with integral bearing
and integrated stator coupling
Angle encoders with integral bearing for separate shaft coupling
2
Contents
4
HEIDENHAIN Angle Encoders
The term angle encoder is typically used to describe encoders that have an accuracy of better than ± 5" and a line count above 10 000.
In contrast, rotary encoders are encoders that typically have an accuracy better than ± 10“.Angle encoders are found in applications requiring precision angular measurement to accuracies within several arc seconds.Examples:
Rotary tables on machine tools • Swivel heads on machine tools • C-axes of lathes
• Measuring machines for gears • Printing units of printing machines • Spectrometers • T elescopes • etc.
The tables on the following pages list different types of angle encoders to suit various applications and meet different requirements.
The RCN 729 angle encoder mounted on the rotary table of a machine tool
RCN 729 incremental angle encoder
Angle encoders can have one of the following mechanical designs:
Angle encoders with integral bearing, hollow shaft and integrated stator coupling
Because of the design and mounting of the stator coupling, it must absorb only that torque caused by friction in the bearing during angular acceleration of the shaft. RCN, RON and RPN angle encoders therefore provide excellent dynamic performance. With an integrated stator coupling, the stated system accuracy also includes deviations from the shaft coupling.
Other advantages:
Compact size for limited installation • space
Hollow shaft diameters up to 100 mm • to provide space for power lines, etc.Simple installation
• Selection Guide
For Absolute Angle Encoders see pages 6/7
For Incremental Angle Encoders see pages 8/9
