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A cam is tested to determine if its contour is within predetermined tolerances. GO-NO-GO lights indicate whether or not the tested cam is acceptable.
English (United States)
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Cam Contour Checking
A cam is tested to determine if its contour is within predetermined
tolerances. GO-NO-GO lights indicate whether or not the tested cam is
A master cam with a correct contour is mounted on a shaft with the cam to be
tested, and a locator pin aligns the two cams. When the shaft is rotated, a
vertically-guided follower moves in accordance with the master cam contour and
a slide follows the tested cam contour. A check probe detects the difference in
the two motions as electric signals.
A programmable calculator detects the reader signals, converts them to
digital pulses and compares the numbers represented by the digital pulses to
desired values. If the detected numbers exceed the desired values by more than
a predetermined amount, a NO-GO indicator is lit, otherwise a GO light is
illuminated. A deviation display shows the current difference between cam
contours, and a printer records the actual contour values and deviations.
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