Image 6.14: Schematic diagram of a linear scale
①
Pitch periods (TP):
(P 542[0] - ENC_CH1_Lines)
②
Reference marks
③
Increment-coded reference measure A (small reference mark interval)
(P 610[0]
- ENC_CH1 Nominalinkrement A)
④
Increment-coded reference measure B (large reference mark interval)
(P 611[0]
- ENC_CH1 Nominalinkrement B)
Legend for Schematic diagram of a linear scale
Homing methods for increment-coded encoders
l
Method -6: Increment-coded encoders with negative direction of rotation
l
Method -7: Increment-coded encoders with positive direction of rotation
MOOG
ID No.: CB40859-001 Date: 11/2020
MSD Servo Drive - Device Help
106
6 Encoder
6.14 Overflow in multi-turn range
With this function the multi-turn range can be shifted in order to avoid a possible
overflow. The function is available for encoder channels 1 and 3.
Example
If a portion of the travel distance is to the left of the threshold (MT Base), it is
appended to the end of the travel range (to the right of the 2048) via parameter
P 547[0] - ENC_CH1_MTBase for encoder channel 1 and P 584[0] - ENC_CH3_ for
encoder channel 3 (unit: increments).
For more information see Section "Main parameters for encoder channel Ch1" on
page 60 andSection "Sin/Cos incremental encoders with absolute value interface"
Image 6.15: Multi-turn range shifting