Drive control and features
70
• Rising edge of encoder DI1 (proximity switch signal) is detected at the first mark
of the belt. Position 0 mm is stored to signal 4.03 PROBE1 POS MEAS.
• Falling edge of encoder DI2 (proximity switch signal) is detected at the second
mark of the belt. Position 40 mm is stored to signal 4.04 PROBE2 POS MEAS.
• The reference distance between the marks is 60 mm and the measured distance
between the marks is 40 mm, thus the error is 20 mm:
(62.18 PROBE2 POS - 62.16 PROBE1 POS) - (4.04 PROBE2 POS MEAS - 4.03
PROBE1 POS MEAS)] = (60 - 0) - (40 - 0) = 20 mm
The error is stored to 4.18 SYNC ERROR:
Actual position of the encoder 1.12 POS ACT is corrected according to 4.18 SYNC
ERROR using positioning parameter and dynamic limiter settings.
Note: Only after the active correction is finished is the next position latching enabled.
62.18 PROBE2 POS 0.060 m (=60 mm) Reference position for actual position probe 2
Parameter Setting Information
t
t
t
t
1.01 SPEED ACT
1.12 POS ACT
Encoder DI1
Encoder DI2
POSITION DERIVATION
MEASURED POSITION DIFFERENCE
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