NI ISM-7400 User Manual
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© National Instruments
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At lower step resolutions such as 200 steps per revolution (full step) and 400 steps per revolution
(half step) motors produce more audible noise than when they are microstepped (2000 steps per
revolution and beyond). The NI ISM-7400 includes a feature called microstep emulation, also
called step smoothing, that can provide smooth motion when using full and half steps. Set switch
6 to the ON position, as shown in the figure below, to provide the smoothest possible motion
when using full and half steps.
Figure 22.
Configuring Step Smoothing on Switch 6
The step smoothing process uses a command filter which causes a slight delay, or lag in the
motion. The following graph shows an example of the delay that can occur from using the step
smoothing filter.
Figure 23.
Delay Due to Filtering