Motor Power Company DUET_FL 48/10, Руководство пользователя

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Page 71
If this method is used, the drive moves in the negative direction at search speed until it reaches the
negative limit switch. In Figure 9 this is represented by the rising edge (movement from the right to the
left). Then the drives moves back at crawl speed and tries to find the exact position of the limit switch.
The zero position refers the first index pulse of the angle encoder in the positive direction from the limit
switch.
Index Pulse
Negative Limit Switch
1
Figure 9: Homing run to the negative limit switch with index pulse evaluation
Method 2: Positive limit switch with index pulse evaluation
If this method is used, the drive moves in the positive direction at search speed until it reaches the
positive limit switch. In Figure 10 this is represented by the rising edge. Then the drives moves back at
crawl speed and tries to find the exact position of the limit switch. The zero position refers the first
index pulse of the angle encoder in the negative direction from the limit switch.
Index Pulse
Positive Limit Switch
2
Figure 10: Homing run to the positive limit switch with index pulse evaluation
In the case of homing methods 1 and 2, you have to make sure that the index mark or the
index pulse of the encoder does not coincide with the switching edge of the limit switch or
that it is located near the switching edge, as this may lead to a home position offset of
one motor rotation.
Method 17: Homing to the negative limit switch
If this method is used, the drive moves in the negative direction at search speed until it reaches the
negative limit switch. In Figure 11 this is represented by the rising edge. Then the drives moves back at
crawl speed and tries to find the exact position of the limit switch. The zero position refers the falling
edge of the negative limit switch.
User Manual DUET_FL „DUET_FL 48/10“ Version 1.1 Motor Power Company