Position information is provided by a motor encoder, which is characterized by its rise time and resolution (counts per turn). A Hewlett-Packard HEDL 5540 500 count per turn encoder is used. The three-phase motor encoder generates a pulse signal for alignment, and two signals with a 90 degree phase difference for position and direction.
|counts per turn||500||rot^-1|
|signal rise time||180||ns|
- Encoder HEDL 5540, 500 CPT, 3 Channels, with Line Driver RS 422 datasheet (May 2009)
- Wikipedia: Rotary encoder (encoder output formats)
- The disc is connected to the motor via 1:2 gearing ratio
- 1000 counts per turn (CPT) of the disc.