LSA-10A-30-D-130 Technical Document
-10-
2-3-2 Triangular Wave Drive Response
Dynamic characteristics of keeping positioning error within the definite range are important for scanning
operations. In the operations, the response characteristics of the saw-tooth wave drive or the triangular
wave drive are important. It is necessary to adjust the conditions during the steep section of saw-tooth
wave drive.
Here, the triangular wave drive is shown as a typical example, indicating conditions that need to be
examined.
♦
Triangular Wave Drive
Perspective of Response Characteristics (observed by oscilloscope)
[5] Emphasized Adjustment Amplitude (Unit: [°])
This indicates the optimally adjusted amplitudes during adjustment.
・
Response and stability are well balanced and optimal when the actual amplitude is equal to the
adjustment amplitude.
・
The gain can be raised and the range of the constant speed is increased as the size of the emphasized
adjustment amplitude decreases.
・
If the amplitudes are not constant, the largest amplitude has to be the emphasized adjustment
amplitude.
[6] Convergence criteria (Unit: [°] or [arc-sec])
[5] Emphasized Adjustment
Amplitude
Positioning Command Signal
Positioning Sensor Signal
Position
Positioning Error Signal
Time
[6] Convergence
Criteria
[7] Constant Speed Interval
Command Interval
Time
Position
[8] Position Delay
