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CAUTION
4
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Chapter 4 Angular Measurements
Angular Position Measurements
Never use an ordinary nut in place of the clutch breakaway nut. The
ordinary nut is not designed to provide the breakaway-under-load
protection provided by the Agilent-provided nut.
After you have assembled and tightened the linkage, unscrew the clutch
breakaway nut and position it about 5 mm (1/4-inch) up the shaft, so it
does not interfere with operation of the clutch.
Spherical washer sets are particularly useful in right-angle situations,
when used with the Agilent-provided adapter, or on complex linkages
where out-of-squareness can be a problem.
1
Clutch control shaft
2
Clutch breakaway nut
3
Clutch washer
4
Top of measurement fixture
1
2
3
*
*
"Neutral" position
**
Side force rocking (jogging) clutch
Breakaway nut tightened to lock clutch in its engaged position.
This is done for setups only. Do not lock the clutch during measurements.
Figure 4-25. Clutch
4-46
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Measurements Reference Guide
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