Vernier Rotary Motion Sensor
Contents
1. Accessories section Attach an Ultra Pulley to the Rotary Motion Sensor Attach the 3 step pulley to the rotating shaft Attach the disk to the 3 step pulley Attach a string to the underside of the hub Attach the Ultra Pulley to the Rotary Motion Sensor using the Ultra Pulley Swivel Mount Run the string over the Ultra Pulley and attach a weight to the end of the string Use the weight to apply a torque to the system while the Rotary Motion Sensor measures the angular acceleration Moment of Inertia of Point Masses requires Rotational Motion Accessory Kit see Accessories section Use the same set up as described in the previous section This time attach a rod with two masses to the 3 step pulley Use the weight to apply a torque to the system while the Rotary Motion Sensor measures the angular acceleration Conservation of Angular Momentum requires Rotational Motion Accessory Kit see Accessories section Attach disk to the 3 step pulley Give the disk a spin While the system is rotating drop a second disk onto the first disk Observe the change in the angular velocity before and after the mass is added to the system Motion of a Physical Pendulum requires Rotational Motion Accessory Kit see Accessories section if Attach the 3 step pulley to the Rotary Motion Sensor with the small step next to the sensor body Attach the center of the rod with two masses to the pulley Position the masses so they are not symmetr2. does not cover damage to the product caused by abuse or improper use Rotational Motion Accessory Kit AK RMV This kit provides a variety of Ultra Pulley Swivel Mount Items included in the Rotational Motion Accessories Kit Measure Analyze Learn Vernier Software amp Technology 13979 S W Millikan Way e Beaverton OR 97005 2886 Toll Free 888 837 6437 e 503 277 2299 e FAX 503 277 2440 info vernier com e www vernier com Rev 10 24 2014 Logger Pro Logger Lite Vernier LabQuest 2 Vernier LabQuest Vernier LabQuest Mini Vernier LabPro and other marks shown are our trademarks or registered trademarks in the United States TI Nspire is a trademark of Texas Instruments All other marks not owned by us that appear herein are the property of their respective owners who may or may not be affiliated with connected to or sponsored by us te Printed on recycled paper
3. will identify the Rotary Motion Sensor and load a default data collection setup You are now How the Rotary Motion Sensor Works ready to collect data Note All other combinations of equipment require you to The Rotary Motion Sensor uses a quadrature optical incremental type encoder to manually set up the sensor or load an experiment file measure the amount and direction of rotation The encoder which 1s attached to the rotating sensor shaft consists of a coded pattern of opaque and transparent sectors Data Collection Software The quadrature encoder produces two pulse output patterns 90 apart in phase The position of the shaft is determined by counting the pulses The phase relationship This sensor can be used with an interface and the following data collection software BT i between the output signals determines the direction of rotation e Logger Pro This computer program is used with LabQuest 2 LabQuest LabQuest Mini and LabPro e LabQuest App This program is used when LabQuest 2 or LabQuest is used as a standalone device e VSTApp This calculator application for the TI 83 Plus and TI 84 Plus contains a program called DaRotary which supports the Rotary Motion Sensor with CBL 2 Atwood s Machine and LabPro The app can be downloaded from www vernier com vst apps and Attach the 3 step pulley to the rotating shaft Use the then transferred to the calculator See www vernier com vst apps for more l thumb screw to attach the Rotar
4. Vernier Rotary Motion Sensor Order Code RMV BTD The Vernier Rotary Motion Sensor is a bidirectional angle sensor designed to measure rotational or linear position velocity and acceleration It is used for a variety of investigations including e Measurement of rotational inertia e Verification of the conservation of angular momentum e Verification of the Law of Malus e Studying the motion a physical pendulum e Measurement of linear position for experiments such as the inverse square law of light e Measurement of linear position for diffraction patterns or interference patterns What is included with the Rotary Motion Sensor The Vernier Rotary Motion Sensor product includes e Rotary Motion Sensor e Thumb screw e 3 step pulley and mounting screw e O ring e Sensor clip Configuring the Rotary Motion Sensor The 3 step pulley can be mounted on the rotating shaft in either of two orientations with the wide side of the pulley near the sensor body or with the narrow side of the pulley near the sensor body The easiest way to insert the 3 step pulley on the Rotary Motion Sensor shaft is hold the shaft to prevent rotation as you turn the pulley to align the key to the slot The O ring can be slipped over the outer pulley to increase friction when the pulley is in contact with a surface The sensor clip can be inserted into the sensor body or the end of the rotating shaft A sensor can be inserted into the clip This arrangement al
5. ic Position the sensor so the face of the pulley is vertical Start the pendulum swinging and determine the angular acceleration as a function of the angle Accessories Rotary Motion Motor Kit MK RMV This kit includes a small 3 12 V electric motor pulley rubber band belt motor clip and mounting screw The motor can be items that add to the versatility of the Rotary Motion Sensor The items include the attached to the Rotary Motion Sensor which can be used to record the motion of the following motor shaft The motor can be used as a tachometer generator etc You can also perform experiments that investigate motor efficiency in different conditions teedii Used with the inverted 3 step pulley to observe conservation of angular momentum Steel disk wiircentalhole Used with the hub to measure rotational inertia of a cylinder Used with the disk described above to measure Hub i ae rotational inertia of a cylinder Used with the masses to measure rotational inertia Hollow rod or to make a pendulum Masses 2 with locking Used with the hollow rod to measure rotational screws inertia Spindle screw Used to hold disks in place Ultra Pulley Use to apply a torque to the 3 step pulley Allows the Ultra Pulley to be connected to the Warranty Rotary Motion Sensor Vernier warrants this product to be free from defects in materials and workmanship for a period of five years from the date of shipment to the customer This warranty
6. lows you to attach a sensor to the Rotary Motion Sensor For example you could attach a Magnetic Field Sensor to the Rotary Motion Sensor and use the Rotary Motion Sensor to accurately measure the angular position of the sensor as it is rotated to determine north SENSOR The thumb screw can be threaded into the back of the sensor allowing the Rotary Motion Sensor to be attached to a ring stand The sensor also has a set of accessory mounting holes which allow it to connect to existing accessories Collecting Data with the Vernier Rotary Motion Sensor Specifications This sensor can be used with the following interfaces to collect data Resolution 1 or 0 25 e Vernier LabQuest 2 or original LabQuest as a standalone device or with a l Bidirectional quadrature encoder 360 cycle e Vernier LabQuest Mini with a computer ee re Cee ee e Vernier LabPro with a computer or TI graphing calculator e Vernier SensorDAQ e TI Nspire Lab Cradle Here is the general procedure to follow when using the Rotary Motion Sensor NOTE Vernier products are designed for educational use Our products are not designed nor recommended for any industrial medical or commercial process such as life support patient diagnosis control of a manufacturing process or industrial testing of any kind Connect the sensor to the interface Start the data collection software Only LabQuest App 1 1 or newer or Logger Pro 3 6 1 or newer
7. y Motion Sensor to a ring D ea as ADD Pi a peaa BA lication for the TI stand Attach each end of the string to a mass and run the aeaQuest Ona Or te eon app ieee nee string over the pulley Use the Rotary Motion Sensor to Nspire can be used with the TI Nspire Lab Cradle determine the acceleration of the system e LabVIEW National Instruments LabVIEW software is a graphical programming language sold by National Instruments It is used with SensorDAQ and can be used with a number of other Vernier interfaces See www vernier com labview for more information Example Experiments The following examples show various ways to use the Rotary Motion Sensor Some of these examples use accessory products described below High resolution mode is also known as X4 mode When active the sensor has a 0 25 degree resolution and a limited maximum measurable rotational velocity Inverse Square Law of Light Attach the 3 step pulley to the Rotary Motion Sensor Slip the O ring over the largest step on the pulley Attach the sensor clip to the Rotary Motion Sensor Attach a Light Sensor to the clip Place the Rotary Motion Sensor on the table top with the Light Sensor pointed at a light source and the O ring in contact with the table As you move the Rotary Motion Sensor toward and away from the light source you can collect light level data as a function of distance Moment of Inertia of a Disk requires Rotational Motion Accessory Kit see
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