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

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

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

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

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

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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