THORLABS KST101 User Manual page 76

Appendix E
Home position can be found. Movement is allowed right through the switch position in
either direction.
-ve limit switch
Linear stage
E.2.4 Minimum and Maximum Positions
These positions are dependent upon the stage or actuator to which the motors are
fitted, and are defined as the minimum and maximum useful positions of the stage
relative to the 'Home' position - see Fig. E.5.
The distance from the Minimum position to the Maximum position is the 'useful travel'
of the stage. It is often the case that the Minimum position is zero. The Home and
Minimum positions then coincide, with movement always occurring on the positive
side of the Home position.
Rotary stages have effectively no limits of travel. The Minimum and Maximum
positions are conventionally set to 0 and 360 degrees respectively. When the position
of a rotary stage is requested, the answer will be reported as a number between 0 and
360 degrees, measured in the positive direction from the Home position.
Offse t
Min. position (zero)
(home)
-ve limit switch
76
+ve limit switch
(or stop)
Fig. E.4 Stage limit switches
SW negative limit
Fig. E.5 Minimum and Maximum Positions
Datum switch
SW positive limit
Trave l
HA0362T Rev C Jan 2017
Rotary stage
Max. position