Methods 5 and 6: Homing on the negative home switch and index pulse
Using methods 5 or 6, the initial direction of movement is dependent on the state of the home switch. The
home position is at the index pulse to either the left or the right of the point where the home switch changes
state. If the initial position is sited so that the direction of movement must reverse during homing, the point at
which the reversal takes place is anywhere after a change of state of the home switch.
Methods 7 to 14: Homing on the home switch and index pulse
These methods use a home switch that is active over only a portion of the travel; in effect the switch has a
“momentary” action as the axle position sweeps past the switch.Using methods 7 to 10, the initial direction of
movement is to the right, and using methods 11 to 14, the initial direction of movement is to the left, except if
the home switch is active at the start of motion. In this case, the initial direction of motion is dependent on the
edge being sought. The home position is at the index pulse on either side of the rising or falling edges of the
home switch, as shown in the following two diagrams. If the initial direction of movement leads away from the
home switch, the drive must reverse on encountering the relevant limit switch.
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