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An automated "soft contact" technique for performing a height measurement above or below a datum surface is described.
English (United States)
This text was extracted from a PDF file.
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Arm Stack Height-Adjust
An automated "soft contact" technique for performing a height measurement
above or below a datum surface is described.
The measurement sequence is as follows (see Fig. 1): probe tip 2 is
positioned below the object surface to be measured 1. Pressure 6 is fed to the
pneumatic displacement device 5 in incremental steps, resulting in the
displacement of balance 3 and the raising of probe tip 2. A signal 7 from the load
cell 4 is monitored by the micro processor to determine if probe tip 2 has made
contact with object surface 1. If probe tip 2 has not made contact, then more
pressure 6 is fed in. Once contact is made, the output signal 8 of the proximity
probe 5 is read by the micro processor. Signal data 9 is run through an algorithm
and the actual height is determined.