Encoders on show at Drives and Controls
A
Heidenhain (GB) product story
Edited by the Engineeringtalk editorial team
Aug 11, 2004
As a key supplier to the world drive market, Heidenhain will show examples of its servo encoder and general encoder product ranges at Drives and Controls this October.
As a key supplier to the world drive market, Heidenhain will show examples of its servo encoder and general encoder product ranges at Drives and Controls this October.
With the growing application of absolute encoders in all forms of drive applications Heidenhain leads the world in offering various mechanical formats in both linear and angular encoders using the EnDat serial encoder interface.
Development details of EnDat 2.2 -the second generation of the successful and proven EnDat encoder interface, will be available on the stand together with a free demo CD.
Cost optimisation for motor manufacturers and builders of machine tools and production systems, an increase in availability and improvement of manufacturing quality, are the key advantages of this improved serial interface for quick-response drives.
The EnDat 2.2 interface now offers purely digital transmission to the higher-level electronics over only four lines.
The analogue signal can no longer be disturbed by interference on the way to the subsequent electronics as it is already interpolated in the encoder.
This improves drive characteristics with regard to positioning accuracy, repeatability, speed stability and dynamic response.
Automatic measurement of the propagation time during switch-on permits clock frequencies of 4MHz over cable lengths up to 100m.
Position value formation in the encoder enables shorter sampling cycles without influencing the computing time of the CNC control.
As the encoder takes over the interpolation, the subsequent electronics can be simpler and therefore smaller.
Also, an improvement of the encoder electronics makes it possible to do without a remote sensing power supply.
The reduction in the number of data lines results in smaller connectors and simplifies cabling, and both of these effects decrease the required installation space.
The improvements provide an opportunity for significant savings in warehousing, because the same interface serves for incremental and absolute encoders.
The incremental rotary encoders of the ROD 400 and ERN 400 series, long recognised as the industry standard, have been fundamentally redesigned and will also be shown.
Substantial improvements have been made in shock and vibration load capacity, qualifying the encoders for newer more demanding applications.
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