PASCO ME-9891 Flexible I-beam - Manual (Page 7)

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M o d e l N o . M E - 9 8 9 1 E x p e r i m e n t: T h r e e - p o i n t B e n d i n g
7
Rotary Motion Sensor option:
a. Install the three-step pulley (included with the sensor)
on the rotary motion sensor.
b. Mount the rotary motion sensor above the I-beam as
(shown in Figure 9) using a stand, clamp, and rods.
c. Tape a piece of string to the center of the I-beam. Run
the string over the smallest step of the three-step
pulley. Hang a small mass (about 50 g) from the end
string.
d. Connect the rotary motion sensor to your PASPORT
interface.
e. In the Setup window of DataStudio (if you are using
a computer) or in the Sensors screen of the Xplorer
GLX (if you are using it in standalone mode), turn on
the Linear Position measurement and set the Linear
Scale setting to “Small Pulley (Groove)”.
5. Connect a force sensor to your PASPORT interface.
Procedure
1. Start data recording.
2. Hold the force sensor in your hand and push straight down on the center of the
I-beam (Figure 10). Gradually increase the applied force until the I-beam has
deflected a few millimeters.
3. Stop data recording.
Figure 10: Push down with force sensor
4. Turn the I-beam on its side, adjust the deflection-measuring sensor, and repeat
the procedure.
Figure 9: Rotary Motion Sensor
Rotary Motion
Sensor
~50 g mass
Tape string
to beam
Force Sensor
Push