Absolute rotary encoders for small servomotors
A
Heidenhain (GB) product story
Edited by the Engineeringtalk editorial team
Dec 6, 2001
Heidenhain is introducing new rotary encoders with a 36.5 mm diameter which enable servomotors with axis heights as small as 20mm (0.79 in) to be equipped with absolute rotary encoders
Heidenhain is introducing new rotary encoders with a 36.5 mm diameter.
With the development of this new series of compact absolute singleturn and multiturn rotary encoders, Heidenhain distinguishes itself from the other solutions available on the market up to now for applications in production automation, robotics and handling technology.
These new encoders enable servomotors with axis heights as small as 20 mm (0.79 in) to be equipped with absolute rotary encoders.
Because they provide the absolute position value immediately upon switch-on or after a power interruption, absolute rotary encoders obviate complicated reference mark runs of often numerous axes, decrease maintenance and improve the equipment's tolerance to disturbances.
The star of the new series is doubtless the EQN 1125 multiturn rotary encoder, since it uses a genuine gear transmission to distinguish between revolutions.
Unlike solutions with electronic revolution counters, the mechanical transmission is not susceptible to interfering signals or battery-backup failure.
The gear transmission fulfils very stringent requirements for operational reliability and is free of maintenance.
The EQN 1125 transmits the absolute position information over the fast serial, bi-directional EnDat interface.
One revolution provides information on 8192 positions.
The multiturn can also differentiate 4096 revolutions.
Because the decreasing dimensions of servomotors cause higher operating temperatures, the series of rotary encoders is designed for use in temperatures up to 115C (239degF).
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