Rev K Jan 2020
Page 40
Chapter 7 Software Reference
Homing
When homing, a stage typically moves in the reverse direction, (i.e. towards the
reverse limit switch). The following settings allow support for stages with both Forward
and Reverse limits.
Direction - the direction sense to move when homing, either Forward or Reverse.
Limit Switch - The hardware limit switch associated with the home position, either
Forward HW or Reverse HW.
Zero Offset - the distance offset (in mm) from the limit switch to the Home position.
Velocity - the maximum velocity at which the motors move when Homing.
For further information on the home position, see Section D.2.2.
Hardware Limit Switches
The operation of the limit switches is inherent in the design of the associated stage or
actuator. The following parameters notify the system to the action of the switches
when contact is made. Select Rev Switch or Fwd Switch as required, then select the
relevant operation.
Switch Makes - The switch closes on contact
Switch Breaks - The switch opens on contact
Ignore/Absent - The switch is missing, or should be ignored.
Note
Typically, the following two parameters are set the same, i.e. both Forward or both
Reverse.
Note
The homing velocity has been optimized at the factory to enhance the limit switch
accuracy and should not normally be adjusted. If this parameter does need to be
altered, the Homing velocity is limited to 5 mm/sec.
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