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PASCO CI-6538 Instruction Manual
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PASCO CI-6538 Instruction Manual

Rotary motion sensor
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Instruction Manual
Manual No. 012-06053B
Rotary Motion
Sensor
Model No. CI-6538

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  • Page 1 Instruction Manual Manual No. 012-06053B Rotary Motion Sensor Model No. CI-6538...

  • Page 3: Table Of Contents

    Rotary Motion Sensor Model No. CI-6538 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 .............

  • Page 4: Equipment List

    *Use Replacement Model Numbers to expedite replacement orders. NA = not sold separately from PASCO Additional Equipment Required Model Number Any PASCO data acquisition device ( ScienceWorkshop ® 500 interface, CI-6400 or CI-6450 or CI-7599 ScienceWorkshop 750 SCSI or 750 USB interface)

  • Page 5: Optional Accessories

    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...

  • Page 6: A" Base Rotational Adapter

    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.

  • Page 7: Ids Mount Accessory

    Rotary Motion Sensor Model No. CI-6538 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...

  • Page 8: Introduction

    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.

  • Page 9: Equipment Setup Options

    Rotary Motion Sensor Model No. CI-6538 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.

  • Page 10: Mounting The Rotary Motion Sensor To A Dynamics Track

    Model No. CI-6538 Rotary Motion Sensor thin rod 3-step Pulley space support rod Figure 4: Mounting the Rotary Motion Sensor with the thin rod from the mini-Rotational Accessory b) Mounting the RMS to a Dynamics Track The Rotary Motion Sensor can be mounted to a Dynamics Track using the IDS Mount Accessory.

  • Page 11: Mounting The Rotary Motion Sensor To The "A" Base

    Rotary Motion Sensor Model No. CI-6538 The Rotary Motion Sensor can be used as a “Smart Pulley” in this configuration by threading a string over the Rotary Motion Sensor pulley and hanging a mass on the string. string Dynamics Cart...

  • Page 12: Mounting The Rotary Motion Sensor To The Gyroscope

    Model No. CI-6538 Rotary Motion Sensor d) Mounting the RMS to the Gyroscope The Rotary Motion Sensor can be mounted to the Gyroscope using the RMS/Gyroscope Accessory. This allows the nutation angle of the Gyroscope to be detected. Gyroscope slotted guide arm...

  • Page 13: Attaching The Mini-Rotational Accessory To The Rms

    Rotary Motion Sensor Model No. CI-6538 Attaching Accessories to the Rotary Motion Sensor (RMS) a) Attaching the Mini-Rotational Accessory to the RMS To attach the thin rod to the RMS, orient the 3-step Pulley so the rod guides on the underside of the pulley face up. The 3-step Pulley and the rotating shaft on the RMS are keyed to assemble only in one position.
  • Page 14 Model No. CI-6538 Rotary Motion Sensor •The end of the rod can be attached to the Rotary Motion Sensor rotating shaft to use it as a pendulum. Rotary Motion Sensor support rod rod with mass Figure 10: Using the rod as a pendulum...

  • Page 15: Attaching The "A" Base Rotational Adapter To The Rms

    Rotary Motion Sensor Model No. CI-6538 b) Attaching the “A” Base Rotational Adapter Accessory to the RMS The drive belt links the 3- step Pulley mounted on the adapter bracket “A” base to the 3-step Pulley on the RMS. For a one-to-...

  • Page 16: Using The Chaos Accessory With The Rms

    14) The mass attaches to the edge of the disk to form a physical pendulum. A PASCO ME-8750 Mechanical Oscillator/Driver is also required to drive the Chaos Accessory. The 1.2 m Dynamics Track is used as a convenient way to mount and align all the components (See Figure 15).

  • Page 17: Operating The Sensor With Data Collection Software

    Rotary Motion Sensor Model No. CI-6538 Using the Rotary Motion Sensor with Data Collection Software To operate the Rotary Motion Sensor, you must plug it into the ScienceWorkshop 750 interface and perform the necessary setup in DataStudio. Calibration of the sensor is not required, but optional for those who wish better accuracy.

  • Page 18: Experiment 1: Rotational Inertia Of A Point Mass

    Model No. CI-6538 Rotary Motion Sensor Experiment 1: Rotational Inertia of a Point Mass Equipment Required Rotary Motion Sensor (CI-6538) ScienceWorkshop ® 750 Interface (CI- 6450 or CI-7599) Mini-Rotational Accessory (CI-6691) Mass and Hangar Set (ME-9348) Base and Support Rod (ME-9355) Triple Beam Balance (SE-8723) Paper clips (for masses <1 g)
  • Page 19 Rotary Motion Sensor Model No. CI-6538 (see Figure 1.1). Solving for the tension in the thread gives: m g a – After the angular acceleration of the mass (m) is measured, the torque and the linear acceleration can be obtained for the calculation of the rotational inertia.
  • Page 20 Model No. CI-6538 Rotary Motion Sensor Procedure Part I: Measurements for the Theoretical Rotational Inertia Weigh the masses to find the total mass M and record in Table 1.1. total Measure the distance from the axis of rotation to the center of the masses and record this radius in Table 1.1...
  • Page 21 Rotary Motion Sensor Model No. CI-6538 b) Measure the Radius Using calipers, measure the diameter of the pulley about which the thread is wrapped and calculate the radius. Record in Table 1.2. c) Finding the Acceleration of the Apparatus Alone In part IIa, “Finding the Acceleration of the Point Mass and Apparatus,”...
  • Page 22 Model No. CI-6538 Rotary Motion Sensor Use a percent differenc to compare the experimental value to the theoretical value. Record in Table 1.3. Table 1.3: Results Rotational Component Inertia Point Masses and Apparatus Combined: Apparatus Alone: Point Masses (experimental value):...

  • Page 23: Experiment 2: Rotational Inertia Of Disk And Ring

    Rotary Motion Sensor Model No. CI-6538 Experiment 2: Rotational Inertia of Disk and Ring Equipment Required ® Rotary Motion Sensor (CI-6538) ScienceWorkshop 750 Interface (CI- 6450 or CI-7599) Mini-Rotational Accessory (CI-6691) Mass and Hangar Set (ME--9348) Base and Support Rod (ME-9355) Triple Beam Balance (SE-8723) Paper clips (for masses <1 g)
  • Page 24 Model No. CI-6538 Rotary Motion Sensor α where is the angular acceleration, which is equal to a/r (a = acceleration), τ is the torque caused by the weight hanging from the thread that is wrapped around the base of the apparatus.
  • Page 25 Rotary Motion Sensor Model No. CI-6538 straight down the middle of the groove on the clamp-on Super Pulley. (see Figure 2.4) Clamp-on 3-step Pulley Super Pulley thread Figure 2.4: Super Pulley position Place the disk directly on the pulley as shown in Figure 2.5.
  • Page 26 Model No. CI-6538 Rotary Motion Sensor Measurements for the Experiment Method a) Finding the Acceleration of the Ring and Disk Open DataStudio and select "Create Experiment." In the Sensors list of the Experiment Setup window, click and drag a RMS Sensor icon to the first of the two consecutive digital ports that the RMS is plugged into on the interface.
  • Page 27 Rotary Motion Sensor Model No. CI-6538 c) Finding the Acceleration of the Disk Alone In "Finding the Acceleration of Ring and Disk," both the disk and the ring are rotating; therefore, it is necessary to determine the acceleration and the rotational inertia of the disk by itself so this rotational inertia can be subtracted from the total, leaving only the rotational inertia of the ring.

  • Page 28: Experiment 3: Conservation Of Angular Momentum

    Model No. CI-6538 Rotary Motion Sensor Experiment 3: Conservation of Angular Momentum Equipment Required Rotary Motion Sensor (CI-6538) ScienceWorkshop ® 750 Interface (CI- 6450 or CI-7599) Mini-Rotational Accessory (CI-6691) Mass and Hangar Set (ME-9348) Base and Support Rod (ME-9355) Triple Beam Balance (SE-8723) Paper clips (for masses <1 g)
  • Page 29 Rotary Motion Sensor Model No. CI-6538 Setup: Mount the RMS to a support rod and connect it to a disk computer. Place the disk directly on the pulley as shown in Figure 3.1. Open DataStudio. RMS with support In the Experiment Setup...
  • Page 30 Model No. CI-6538 Rotary Motion Sensor Analysis: Calculate the expected (theoretical) value for the final angular velocity and record this value in Table 3.1. Calculate the percent difference between the experimental and the theoretical values of the final angular velocity and record in Table 3.1.

  • Page 31: Appendix A: Specifications

    Rotary Motion Sensor Model No. CI-6538 Appendix A: Specifications Rotary Motion Sensor Description 3-Step Pulley 10 mm, 29 mm, and 48 mm diameters Resolution and 0.25 Accuracy +/- 0.09 degrees Maximum rotation speed 13 revs/sec at 1 resolution 3.25 revs/sec at 0.25...

  • Page 32: Appendix B: Calibration

    Appendix B: Calibration of the Rotary Motion Sensor Calibration of the CI-6538 ScienceWorkshop® Rotary Motion Sensor is not required. However, you can zero the CI-6538 Rotary Motion Sensor as follows: 1. Connect a ScienceWorkshop Rotary Motion Sensor and set the sensor to the zero position (See the instruction sheet or experiment guide provided with your Rotary Motion Sensor for instructions.)

  • Page 33: Appendix C: Technical Support

    Rotary Motion Sensor Model No. CI-6538 Appendix C: Technical Support For assistance with the CI-6538 Rotary Motion Sensor or any other PASCO products, contact PASCO as follows: Address: PASCO scientific 10101 Foothills Blvd. Roseville, CA 95747-7100 Phone: (916) 786-3800 FAX:...

  • Page 34: Appendix D: Copyright And Warranty Information

    PASCO scientific warrants the product to be free from defects in materials and workmanship for a period of one year from the date of shipment to the customer. PASCO will repair or replace, at its option, any part of the product which is deemed to be defective in material or workmanship.

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