Delta D25886 User Manual Page 333

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Appendix D
DVP-MC operating manual D-1
Appendix D Explanation of Homing Methods
10MC11T provides several homing methods from which user can choose the appropriate one in accordance
with on-site condition and technical requirement.
¾ Method 1 Homing on the negative limit switch and Z pulse
In this homing method, when negative limit switch is inactive, the initial movement direction is negative;
when negative limit switch is active, movement direction starts to be changed; the home position is where
the first Z pulse is when negative limit switch is inactive as shown below.
Negative limit switch
Z pulse
1
¾ Method 2 Homing on the positive limit switch and Z pulse
In this homing method, when positive limit switch is inactive, the initial movement direction is positive;
when positive limit switch is active, movement direction starts to be changed; the home position is where
the first Z pulse is when positive limit switch is inactive as shown below.
2
Z pulse
Positive limit switc
h
¾ Method 3 and 4 Homing on positive home switch and Z pulse
In method 3 and 4, the initial movement direction depends on whether the positive home switch is active or
inactive. The home position in method 3 is at the place of the first Z pulse after positive home switch
changes the status from active to inactive. The home position in method 4 is at the place of the first Z
pulse after positive home switch changes from inactive status to active status or from active status to
inactive status.
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