QEI (Quadrature Encoder Interface)
QEI (Quadrature Encoder Interface) is a feedback signal (encoder) for small motor control. QEA/QEB provide motor speed (RPM); adding INDX also provides motor angle.
Wrong encoder line count or INDX edge setting yields incorrect RPM/angle. For channel-prefix differences, see Settings.
Decode Settings
- Channel: Assign QEA / QEB / INDX channels.
- Encoder lines: Encoder line count. Default: 400.
- INDX: Use the INDX signal. Field enabled (Enable) when checked; INDX channel and rising-edge option are enabled with this option. Default: checked.
- 0 degree from rising edge of index pulse: Treat the INDX rising edge as 0°. Field enabled (Enable) when checked (requires INDX). Default: cleared (falling edge is 0°).
- Draw curve: Draw angle/speed curves. Field enabled (Enable) when checked. Default: cleared.
Result