Using Absolute Rotary Encoders for servomotors
A
Heidenhain (GB) product story
Edited by the Engineeringtalk editorial team
Dec 5, 2001
With new economically-priced inductive rotary encoders, Heidenhain has expanded its product range to applications with lower accuracy requirements, which until now were mainly satisfied with resolvers
Heidenhain presents low-priced rotary encoders for standard applications.
With new, economically-priced, inductive rotary encoders, Heidenhain has expanded its product range to applications with lower accuracy requirements, which until now were mainly satisfied with resolvers.
The special advantage of resolvers is their robustness, but they cannot fulfil the demands of drive technology for simpler commissioning, an electronic ID label and diagnostic functions.
The new inductive rotary encoders, on the other hand, with their inductive scanning principle and well-known EnDat interface, fulfil exactly these requirements, and are even superior to resolvers in terms of positioning accuracy, speed stability and control dynamics.
Along with the singleturn version (ECI 1317), which counts 17 bits - 131 072 measuring steps per revolution, there is also a multiturn version, the EQI 1329, with 4096 distinguishable revolutions (12 bits).
The multiturn is only 39 mm long.
The new rotary encoders are mechanically compatible with the optical variant, the seasoned EQN 1325.
The motor non-drive end shield and the electrical interface remain identical regardless of the choice between optical and inductive encoders, meaning that the motor manufacturer can produce a large number of identical parts, which increases production lots and lowers production prices.
The same also applies to the subsequent electronics and connecting cables.
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