3.4. Limits, Marker, and Machine Direction
Aerotech stages are configured to have positive and negative "machine" directions. The machine
direction defines the phasing of the feedback and motor signals and is dictated by the stage wiring (refer
to
). Programming direction of a stage is set by the controller that is used to move the stage.
Programming direction is typically selectable in the controller, while machine direction is hardwired in the
stage.
shows the machine direction of PRO225SL/SLE stages.
The home marker is located near the center of travel on stages with a linear encoder (SLE models). For
stages without the linear encoder option (SL models), the marker is located in the rotary motor and will
be triggered near the designated home limit.
Figure 3-3:
Machine Direction
3.4. Limits, Marker, and Machine Direction
PRO225SL/SLE Hardware Manual
40
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