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signatureACE®
SPCview™ #004 - Interval valley
Figure # 75 - Blanking operation on the Right connecting rod
Description:
This feature returns the value of the minimum valley between the start and the end of a defined
window (not the data collection window of the tool). If there are multiple valleys in the window,
only the least valley will be returned. Note that a valley is defined as a point at which the slope of
the signature changes from negative on the left to positive on the right.
Parameters:
Selected channel data to calculate the valley from, can be real or virtual
Window start, in degrees or position off BDC
Window end, in degrees or position off BDC
Use:
In this example, the valley feature is used to capture the minimum force during the blanking
operation, or the peak tension force, in the right upright. Due to the large amount of force required
for the blanking operation at the far-left end of the slide, there is a bending moment in the slide, i.e.,
the left end is in compression and the right end is in tension. By comparing the peak on the left end
to the valley at the right end, the force that lead to non-parallel motion of the slide can be
monitored.
Error Check:
Refer to the "If a Programmed Feature Doesn’t Work" section below at page #101 for a
description of the overflow error that could occur using this feature.
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