Festo Электроцилиндр - Manual (Page 23)

2 Overview
Festo – GDCP-CMMO-ST-EA-SY-EN – 1301a – English 23
2.7.3 Homing methods to switch with/without index search
Homing methods to switch
– Direction: negative
REF AZ
+
1
2
– Direction: positive
REF AZ
1
2
1 The drive runs to the switch at the search speed, turns around and moves slowly at creep speed
in the reverse direction. The reference point REF is at the switch-off point of the switch or on the
following index pulse (depending on parameterisation).
2 Optional movement to zero: The drive runs from the reference point REF at positioning speed to
the axis zero point AZ.
Tab. 2.4 Homing to switch
For closed-loop operation ( section 2.2.4):
A distinction is made between the following options:
1. At the start of the homing run the switch is already actuated.
In this case, the drive runs counter to the parameterised homing direction.
2. The switch is only found after the start of the movement.
In this case, the drive initially runs in the parameterised homing direction, turns after locating the
switch edge and moves in the reverse direction.
3. The drive moves against a stop before a switch is found.
In this case, the drive reverses and searches for the switch in the reverse direction. If a switch is
found, the drive moves through the complete switching range.