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Newport XPS-Q8 - Page 173

Newport XPS-Q8
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XPS-Q8 Controller Motion Tutorial
This table summarizes the results of the example above:
Position Pulse enable Pulse 1
of the stage 1 state activation Explanation
0 0 No Position compare not enabled
5 1 Yes Position compare enabled, first pulse
5…25 1 Yes One pulse every 0.002 mm
25 1 Yes Last pulse
25.002 0 No Position compare disabled
30 0 No Position compare disabled
The figure below shows actual screen shots from an oscilloscope for the example above.
The enable window is displayed in ch1 and the pulses in ch2:
At position 5 mm, the position compare output functionality becomes active and the
first pulse is generated. Then, pulses are generated every 2 µm which equals a time span
of 100 µs at a speed of 20 mm/s (2 µm/20 mm/s = 100 µs).
This second picture shows a zoom of the second pulse. The duration of the pulse should
be 200 ns, however the pulse duration can be longer as the rising edge is related to the
161 XPSDocumentation V1.4.x (EDH0301En1060 10/17)

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