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Figure 2-1.
Synchronization of Type 1531 Strobotac with rotating cam, using Type
1531-P2 Flash Delay ond Type 1536 Photoelectric Pickoff.
2.9.3 USE WITH LINEAR SPEED WHEEL.
The Type 1531-P3 Linear Speed Wheel is used with the Type 1531
for accurate measurement of linear speeds of moving objects, such as
belts. This combination can also be used to determine the surface speeds
of rotating devices, such as wheels, drums, rollers, etc., as well as
the relative speeds of multiple V-belts and other groups of moving ob-
jects. See Figure 2-2.
The Linear Speed Wheel consists of two black nylon wheels of
difrerent diameters, freely turning on opposite ends of a steel rod. The
three six-inch rod sections supplied have threaded ends so that one, two,
or three lengths can be used. A 1/16-inch white radial strip and the pro-
per speed-ratio data are marked on the surface of each wheel.
In use, the selected wheel is pressed against the moving object
whose linear or surface speed is to be measured, and the rotating wheel
is illuminated by the flashing light of the stroboscope. The dial of the
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