Drive control and features
79
Distance correction with one probe
The purpose is to measure the distance between two consecutive latches from one
probe and compare it with the distance of the reference positions 62.16 PROBE1
POS and 62.18 PROBE2 POS. If there is a deviation, a corresponding correction is
carried out on drive actual position 1.12 POS ACT. Both latches use the same latch
signal source (eg, encoder interface digital input DI1) and latch command (eg, rising
edge). If the application requires different latch commands, see section Distance
correction with two probes on page 81.
Example:
The following figure shows a conveyer system where a box should be positioned.
The conveyer belt is marked every 40 mm.
Parameter Setting Information
60.02 POS AXIS MODE (0) Linear Positioning between minimum position 60.14
MINIMUM POS and maximum position 60.13
MAXIMUM POS
60.05 POS UNIT (2) Meter All position values are in metres
62.14 CYCLIC CORR MODE (3) 1 Probe Dist Distance correction with one probe
62.15 TRIG PROBE1 (1) ENC1 DI1 _– Rising edge of encoder 1 digital input DI1.
Source of the actual position latching
command (proximity switch signal source)
62.16 PROBE1 POS 0 m Reference position for position probe 1
62.18 PROBE2 POS 0.040 m (= 40 mm) Reference position for position probe 2
M
3~
40 mm
ENCODER GEARBOXMOTOR
PROXIMITY SWITCH
Encoder DI1
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