29
T-Cube Position Aligner
the demand sense is positive - see Fig. 4.10. If they move to the right, the demand
sense is negative.
Fig. 4.10 X-axis Position Demand Sense Check
6) Check that the piezo controller connected to the LV OUT YDIFF connector, is
driving the Y-axis piezo actuator. Turn the control knob on the piezo controller to
increase the piezo drive voltage. The laser beam should move along the Y axis
with very little X axis movement. If the beam moves in the X-axis (or diagonally),
the piezo controller is connected to the wrong mirror mount axis.
7) When the Y-axis piezo voltage is increased, if the Target LEDs move towards the
top, the demand sense is positive. If the LEDs move towards the bottom, the
demand sense is negative.
Note
The default settings for the Position Demand Sense is ‘Positive’, which is
correct for the set up shown in Fig. 4.9. If the check described at item (5)
shows a negative demand sense, then it will be necessary to connect a
PC to change the
Position Demand Sense
parameter in the Settings panel
- see Section 6.2.
Note
The default settings for the Position Demand Sense is ‘Positive’, which is
correct for the set up shown in Fig. 4.9. If the check described at item (7)
shows a negative demand sense, then it will be necessary to connect a
PC to change the
Position Demand Sense
parameter in the Settings panel
- see Section 6.2.
Gradually decreasing the piezo voltage moves the leds to the right
Gradually increasing the piezo voltage moves the leds to the left
Positive Position Demand Sense Response
