How useful is the CRT display?
A CRT display provides real-time visual control of the alignment process. It displays the autoalignment piezoactuator controller’s operating parameters, indicating the extent and direction of the piezo electric movements, both vertically and horizontally i.e., the position of the circle, and the modulation depth i.e., the diameter of the circle. The upper right hand corner of the screen represents the maximum piezo extension position. By maintaining the scanning circle on the screen, the user ensures that piezo travel limits are not exceeded and that loss of throughput signal never occurs.
