PASCO CI-6538 Manual de usuario
Instruction Manual
Manual No. 012-06053B
Rotary Motion
Sensor
Model No. CI-6538
Rotary Motion Sensor Model No. CI-6538
2®
Table of Contents
Equipment List........................................................... 3
Optional Accessories................................................. 4-5
Mini-Rotational Accessory ............................................................................................................4
Linear Motion Accessory...............................................................................................................4
Chaos Accessory ............................................................................................................................4
“A” Base Rotational Adapter.........................................................................................................5
RMS/Gyroscope Mounting Bracket...............................................................................................5
IDS Mount Accessory....................................................................................................................6
3-Step Pulley Accessory ................................................................................................................6
Introduction ............................................................. 7
Equipment Setup Options ............................................... 8
Mounting the Rotary Motion Sensor on a Support Rod ................................................................8
Mounting the Rotary Motion Sensor to a Dynamics Track ...........................................................9
Mounting the Rotary Motion Sensor to the “A” Base .................................................................10
Mounting the Rotary Motion Sensor to the Gyroscope ...............................................................11
Attaching the Mini-Rotational Accessory to the RMS .......................................................... 12-13
Attaching the “A” Base Rotational Adapter to the RMS.............................................................14
Using the Chaos Accessory with the RMS ..................................................................................15
Operating the Sensor with Data Collection Software ............. 16
Using the Rotary Motion Sensor with DataStudio Software .......................................................16
Suggested Experiments
Experiment 1: Rotational Inertia of a Point Mass.................................................................. 17-21
Experiment 2: Rotational Inertia of Disk and Ring ............................................................... 22-26
Experiment 3: Conservation of Angular Momentum ............................................................ 27-29
Appendix A: Specifications............................................ 30
Appendix B: Calibration ............................................... 31
Appendix C: Technical Support ....................................... 32
Appendix D: Copyright and Warranty Information .................. 33
®
Model No. CI-6538 Rotary Motion Sensor
3
Rotary Motion Sensor
Model No. CI-6538
Equipment List
*Use Replacement Model Numbers to expedite replacement orders.
NA = not sold separately from PASCO
Included Equipment Replacement
Model Number*
1. Rotary Motion Sensor CI-6539
2. O-ring NA
3. Ziplock Bag NA
Additional Equipment Required Model Number
Any PASCO data acquisition device (
ScienceWorkshop
®500 interface,
ScienceWorkshop
750 SCSI or 750 USB interface)
CI-6400 or CI-6450
or CI-7599
A computer NA
DataStudio®Software CI-6470C
Optional Items Part Number
Rotary Motion Sensor Experiment Manual 021-06053
1
2
3
Rotary Motion Sensor Model No. CI-6538
4®
Optional Accessories
Mini-Rotational
Accessory - The PASCO
CI-6691 Mini-Rotational
Accessory is used to
perform rotational inertia
experiments, conservation
of angular momentum
experiments, and pendulum
experiments. Included are
an aluminum disk, a steel
ring, a long thin rod, and two brass masses which can be attached at
any point on the thin rod to act as point masses. (For instructions on
attaching this accessory, see “Equipment Setup” in this manual).
Linear Motion Accessory - The
PASCO CI-6688 Linear Motion
Accessory is a 21 cm long rack that is
inserted into the t-slot in the side of
the RMS to convert a linear motion
into a rotary motion. The teeth on the
rack engage a gear inside the RMS,
causing it to rotate as the rack is
pushed through the slot. The rack may
be inserted into either side of the
RMS. Sensors can be mounted to the
rack using the rod clamp which can be attached to either end of the
Linear Motion Accessory rack. (For instructions on using this
accessory, see “Equipment Setup” in this manual).
Chaos Accessory - The PASCO CI-
6689 Chaos Accessory consists of an
aluminum disk (identical to the one
provided with the Mini-Rotational
Accessory), a mass which attaches to
the edge of the disk to form a physical
pendulum, two springs for putting
tension in the thread, a mounting
bracket for mounting the RMS to the
PASCO Introductory Dynamics
System tracks (1.2 meter ME-9435A
or 2.2 meter ME-9458), and an adjustable-gap magnet which attaches
®
Model No. CI-6538 Rotary Motion Sensor
5
to the side of the RMS to provide variable magnetic damping. (For
instructions on using this accessory, see “Equipment Setup” in this
manual).
The Chaos Accessory is a driven damped physical pendulum. Various
types of phase plots can be made as the driving frequency, driving
amplitude, initial conditions, and the amount of damping are varied.
“A” Base Rotational Adapter -
The CI-6690 “A”-base Rotational
Adapter is used to mount the Rotary
Motion Sensor to the “A” base of the
ME-8951 Rotating Platform or the
ME-8960 Gyroscope. The RMS
provides higher resolution than a
Smart Pulley, and precession of the
Gyroscope can be plotted since the RMS keeps track of direction of
rotation. The adapter includes a mounting bracket, a shoulder screw, a
drive belt (o-ring), and a 3-step Pulley. (For instructions on attaching
this accessory, see “Equipment Setup” in this manual).
RMS/Gyroscope Mounting Bracket
The PASCO ME-8963 RMS/
Gyroscope Mounting Bracket
attaches the Rotary Motion Sensor to
the ME-8960 Gyroscope so the angle
of nutation can be detected. (For
instructions on attaching this
accessory, see “Equipment Setup” in this manual).
Rotary Motion Sensor Model No. CI-6538
6®
IDS Mount Accessory
The PASCO CI-6692 IDS Mount Accessory
is a bracket that allows the Rotary Motion
Sensor to be attached to the Introductory
Dynamics System tracks.
3-Step Pulley Accessory (CI-6693)
The PASCO CI-6693 3-step Pulley
Accessory includes an additional
pulley for mounting a 3-step Pulley on
each end of the Rotary Motion Sensor
rotating shaft. It also includes an o-
ring.
®
Model No. CI-6538 Rotary Motion Sensor
7
Introduction
The PASCO CI-6538 Rotary Motion Sensor is a bidirectional position
sensor designed for use with the PASCO ScienceWorkshop™ 750
Interface. It contains an optical encoder which gives a maximum of
1440 counts per revolution (360 degrees) of the Rotary Motion Sensor
shaft. The resolution can be set in the ScienceWorkshop software to
360 or 1440 times per revolution (1 degree or 1/4 degree). The
direction of rotation is also sensed.
The Rotary Motion Sensor has two phone plugs which plug into any
two adjacent digital channels on the 750 interface box.
The rod clamp can be mounted on three sides of the sensor case,
allowing the Rotary Motion Sensor to be mounted on a rod stand in
many different orientations. The 3-step Pulley keys into the rotating
shaft and can be mounted on either end of the shaft. A rubber o-ring is
intended to be slipped over the largest pulley step so the RMS can be
pressed against a surface to sense the relative motion between the
sensor and the surface. The end of the Rotary Motion Sensor where
the cord exits the case provides a platform for mounting a clamp-on
Super Pulley. The t-slot in either side of the RMS is for inserting the
optional Linear Motion Accessory rack. This allows you to measure
linear motion over the length of the rack.
thumbscrew
rod clamp
3-step Pulley
rotating shaft
platform
case
phone plugs
o-ring additional
mounting position
for rod clamp
t-slot
Figure 1: Rotary Motion Sensor Parts
Rotary Motion Sensor Model No. CI-6538
8®
General Setup Options
1) Mounting the Rotary Motion Sensor (RMS)
a) Mounting the RMS on a Support Rod
The Rotary Motion Sensor can be mounted on a support rod using the
supplied rod clamp. The rod clamp can be mounted in three different
locations on the Rotary Motion Sensor: at the end opposite the cable
and on either side of the case. A Phillips screwdriver is required to
remove the two screws that hold the rod clamp on the Rotary Motion
Sensor case.
It is possible to mount the RMS horizontally on a support rod, with the
3-step Pulley facing up or vertically, with the pulley facing forward.
RMS case
Figure 2: Rod clamp positions
rod clamp
RMS (vertical)
RMS (horizontal)
Figure 3: Rotary Motion Sensor positions on a support rod
Note: When setting
up the rotational
inertia experiment
with the thin rod for
the mini-rotational
accessory, the
Rotary Motion Sen-
sor must be
mounted at the top
of the support rod,
so that the support
rod does not inter-
fere with the rota-
tion of the thin rod.
®
Model No. CI-6538 Rotary Motion Sensor
9
b) Mounting the RMS to a Dynamics Track
The Rotary Motion Sensor can be mounted to a Dynamics Track using
the IDS Mount Accessory. To mount the RMS to the track, do the
following: a) Slide the square nut into the insert on the side of the
track. b) Slide the horizontal rod from the IDS mount through the hole
on the clamp of the RMS. Tighten the screw on the RMS clamp to
hold the rod in place. c) Tighten the screw on the IDS mount to the
square nut in the track. (See Figures 5a and 5b.)
thin rod
space
RMS
3-step Pulley
support rod
Figure 4: Mounting the Rotary Motion Sensor with the
thin rod from the mini-Rotational Accessory
Figure 5a: Attaching the IDS bracket to the track
IDS mount
track
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