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Absolute encoder with DRIVE-CLiQ

Absolute encoders output an absolute angular position between 0В° and 360В°. They operate on the same scanning principle as incremental encoders, but have a greater number of tracks. For example, if there are 13В tracks, then 2¹³В =В 8192В steps are coded in the case of single-turn encoders. The code used is a one-step code (gray code). This prevents any scanning errors from occurring. After switching on the machine, the position value is transferred immediately to the controller, travel to a reference point is not necessary.

All absolute encoders are available in single-turn and multi-turn versions.

Single-turn encoders

Single-turn encoders divide one rotation (360В degrees mechanical) into a specific number of steps, e.g. 8192. A unique code word is assigned to each position. After 360В° the position values are repeated.

Multi-turn encoders

Multi-turn encoders record the number of revolutions in addition to the absolute position within one revolution. To do this, further code discs which are coupled via gear steps with the encoder shaft are scanned. When evaluating 12В additional tracks, this means that an additional 2¹²В =В 4096 revolutions can be coded.