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HA0303T Rev A Feb 2014
Chapter 4
2) Adjust the OUTPUT pot on the piezo drivers until both displays read 37.5 V.
3) Adjust the manual actuators on the turning mirror as necessary to position the
laser beam in the detector array.
4) Press the MODE button on the position aligner to select ‘Closed Loop’ mode.
5) The piezos drivers will position the piezo mirror such that the laser beam is held
central within the detector array, i.e. for a 75V piezo, the piezo driver displays
37.5V and the TARGET display shows the green center LED lit - see Fig. 4.13.
Fig. 4.13 TARGET and VOLTS Displays Showing Values At Mid Position
6) If any positional changes occur, due perhaps to thermal drift, the position aligner
sends a signal to the piezo drivers to reposition the beam such that it is
maintanined in a central position.
