Quanser QNET Physics and Dynamics User manual

USER MANUAL
QNET Physics and Dynamics Board for NI ELVIS
Set Up and Configuration
CAPTIVATE. MOTIVATE. GRADUATE.
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CE Compliance This product meets the essential requirements of applicable European Directives as follows:
• 2006/95/EC; Low-Voltage Directive (safety)
• 2004/108/EC; Electromagnetic Compatibility Directive (EMC)
Caution: This is a Class A product. This product may cause radio interference in a domestic
environment, in which case the user may be required to take adequate measures.
QNET PHYSICS AND DYNAMICS - User Manual 2

Contents
Safety Information 3
1 Introduction 5
2 System Hardware 6
2.1 System Schematic 6
2.2 Hardware Components 7
2.3 Environmental 8
2.4 System Parameters 9
3 QNET Physics and Dynamics and NI ELVIS II Setup 10
3.1 QNET Physics and Dynamics Components 10
3.2 NI ELVIS II Components 10
3.3 NI ELVIS II Setup Procedure 11
4 Troubleshooting 13
4.1 General Software Issues 13
4.2 General Hardware Issues 13
QNET PHYSICS AND DYNAMICS - User Manual v 1.0

Safety Information
The following symbols and definitions are interchangeably used throughout the User Manual:
Symbol Description
Caution: consult documentation for additional information
Direct Current
∣On (Power) [on NI ELVIS II unit]
○Off (Power) [on NI ELVIS II unit]
Table 0.1: Symbols
QNET PHYSICS AND DYNAMICS - User Manual 4

1 Introduction
The Quanser QNET Physics and Dynamics for NI ELVIS II, pictured in Figure 1.1, is a versatile physics and dynamics
system designed to teach and demonstrate the basic physical and dynamical principles in a variety of ways. The
system is comprised of a catapult with adjustable release angle equipped with an rotational encoder as well as a
sliding mass arm with an adjustable incline. The sliding mass experiments are carried out with a multi-surfaced sliding
mass that is connected with a wire over a pulley equipped with an encoder to manually adjustable counterweights.
Furthermore, the sliding mass arm can be used for pulley experiment as well as a oscillation experiment.
Main QNET Physics and Dynamics features:
• Compact physics and dynamics system for NI ELVIS II
• Encoder mounted to catapult arm with manually adjustable release angle
• Electronic release of catapult arm
• Encoder mounted to the end of an adjustable sliding mass arm
• Electronic release of sliding mass
• Sliding mass cube with 4 different surfaces
• Spring for mass-spring-damper experiment
• Two 100 g weights
• Two 50 g weights
• Return pulley attachment
• Two different lengths rods for multiple setups of oscillation experiment
• Built-in PCI connector for NI ELVIS II
Figure 1.1: Quanser QNET Physics and Dynamics for NI ELVIS II
Caution
This equipment is designed to be used for educational and research purposes and is
not intended for use by the general public. The user is responsible to ensure that the
equipment will be used by technically qualified personnel only.
QNET PHYSICS AND DYNAMICS - User Manual v 1.0

2 System Hardware
2.1 System Schematic
The QNET Physics and Dynamics provides the communication interface with the NI ELVIS II for the electromagnet
release commands and encoder ports. The interaction between the different system components on the QNET
Physics and Dynamics is illustrated in Figure 2.1. The NI ELVIS II is interfaced to the PC or laptop via USB link. The
NI ELVIS II block reads the angular encoder inputs of the catapult axis and the pulley on the sliding mass arm. It
also commands the electromagnets to release the catapult arm and the sliding mass.
Figure 2.1: Interaction between QNET Physics and Dynamics components
The schematic given in Figure 2.2 illustrates the main QNET Physics and Dynamics components and how they
interact with the NI ELVIS II.
Figure 2.2: Interaction between QNET Physics and Dynamics components
QNET PHYSICS AND DYNAMICS - User Manual 6

2.2 Hardware Components
The main components comprising the QNET Physics and Dynamics are labeled in Figure 2.3 and are listed in
Table 2.1.
ID# Description ID# Description
1 Electromagnet sliding mass arm 12 100 g weight
2 Adjustable joint sliding mass arm 13 Multisided sliding mass cube
3 Pin to adjust sliding mass arm angle 14 50 g weights
4 Sliding mass arm 15 Free moving pulley
5 Tapered terminal for pulley experiment 16 +5V LED
6 Oscillation experiment terminal 17 PCI connector
7 Pulley turn wheel 18 Catapult arm encoder
8 Pulley for sliding mass experiment 19 Adjustable release angle catapult arm
9 Sliding mass arm encoder 20 Pin to adjust catapult release angle
10 Oscillation experiment rods 21 Catapult arm
11 5-pin encoder and 2-pin electromagnet connectors 22 Catapult arm projectile
Table 2.1: QNET Physics and Dynamics component nomenclature
Figure 2.3: General layout of QNET Physics and Dynamics
Caution
The catapult arm is designed as a projectile motion experiment for use only with the
provided table tennis ball.
QNET PHYSICS AND DYNAMICS - User Manual v 1.0

2.2.1 Electromagnets
The QNET Physics and Dynamics includes two electromagnets to electronically control the behaviour of the sliding
mass and catapult experiments.
The QNET Physics and Dynamics incorporates the APW Company electromagnets model EM075-6-222-01. The
complete specification sheet of the electromagnets is available online at:
http://catalog.apwcompany.com/Asset/6035.pdf
2.2.2 Encoder
The encoder used to measure the angular position of the catapult and sliding mass arm on the QNET Physics and
Dynamics is a single-ended optical shaft encoder. It outputs 2048 counts per revolution in quadrature mode (512
lines per revolution).
2.3 Environmental
The QNET Physics and Dynamics is designed to function under the following environmental conditions:
• Standard rating
• Indoor use only
• Temperature 5 °C to 40 °C
• Altitude up to 2000 m
• Maximum relative humidity of 80 % up to 31 °C decreasing linearly to 50 % relative humidity at 40 °C
• Pollution Degree 2
• Mains supply voltage fluctuations up to ±10 % of the nominal voltage
• Maximum transient overvoltage 2500 V
• Marked degree of protection to IEC 60529: Ordinary Equipment (IPX0)
QNET PHYSICS AND DYNAMICS - User Manual 8

2.4 System Parameters
Table 2.2 lists and characterizes the main parameters associated with the QNET Physics and Dynamics.
Symbol Description Value
Encoder
Encoder line count 512 lines /rev
Encoder line count in quadrature 2048 lines /rev
Sliding Mass Experiment
m0Weight sliding mass cube 130 g
m1Weight small free weight 50 g
l1Length small free weight 1.27 ×10−2 m
m2Weight large free weight 100 g
l2Length small free weight 2.54 ×10−2 m
r1Radius free weights 1.27 ×10−2 m
mcoupler Weight connector coupler 2 g
mwire Weight cable 3 g
rp0 Radius sliding mass experiment pulley 2.54 ×10−2 m
L0Length sliding mass arm from electromagnet to stop block 2.49 ×10−1 m
𝜇PETG Typical coefficient of kinetic friction PETG on aluminum 0.25
𝜇Teflon Typical coefficient of kinetic friction teflon on aluminum 0.18
𝜇Rubber Typical coefficient of static friction rubber on aluminum 0.86
𝜇Styrene Typical coefficient of kinetic friction styrene on aluminum 0.32
Mass-Spring-Damper Experiment
kspring Spring constant of extension spring 17.34 N/m
lspring Overall length of extension spring 6.35 ×10−2 m
lspring,max Maximum extended length of extension spring 2.616 ×10−1 m
mmax Maximum load of extension spring 387 g
Oscillation Experiment
Lrod1 Length of short rod for oscillation experiment (without thread) 7.62 ×10−2 m
mrod1 Weight of short rod for oscillation experiment 6.5 g
Lrod2 Length of long rod for oscillation experiment (without thread) 1.524 ×10−1 m
mrod2 Weight of long rod for oscillation experiment 13.2 g
rosc Radius of terminal for oscillation experiment 1.27 ×10−2 m
Pulley Experiment
rp1 Radius small fixed pulley 7.94 ×10−3 m
rp2 Radius large fixed pulley 1.588 ×10−2 m
rp3 Radius free moving pulley 1.27 ×10−2 m
mpWeight free moving pulley 12 g
Catapult Experiment
mcat Weight catapult arm 74.9 g
Lcat Length catapult arm from pivot to center projectile holder 2.294 ×10−1 m
𝜏cat Torque constant torsional spring at 180° deflection 2.825 ×10−1 N m
Table 2.2: QNET Physics and Dynamics System Parameters
QNET PHYSICS AND DYNAMICS - User Manual v 1.0

3 QNET Physics and Dynamics
and NI ELVIS II Setup
The procedure to install a QNET Physics and Dynamics module on the NI ELVIS II is detailed in this section. The
NI ELVIS II components used in the installation procedure are located and marked by an ID number in Figure 3.1,
and described in Table 3.1.
Caution
If the equipment is used in a manner not specified by the manufacturer, the protection
provided by the equipment may be impaired.
3.1 QNET Physics and Dynamics Components
To setup the QNET Physics and Dynamics system, you need the following components:
1. QNET Physics and Dynamics PCB (shown in Figure 1.1)
2. Two M4x22mm screws to secure the QNET Physics and Dynamics PCB to the NI ELVIS II
3.2 NI ELVIS II Components
Figure 3.1: Components on NI ELVIS II
QNET PHYSICS AND DYNAMICS - User Manual 10

ID# Description
1 NI ELVIS II
2 Prototyping board power switch
3 Prototype Power LED
4 Ready LED
5 Power cable for NI ELVIS II
6 USB connection between PC and NI ELVIS II
Table 3.1: ELVIS II components
3.3 NI ELVIS II Setup Procedure
Follow these instructions to setup a QNET Physics and Dynamics on an NI ELVIS II:
Caution
The unit is provided with a grounded cord to be used with a properly grounded outlet
only, this is a safety feature, do not disable it.
Caution
Do NOT make the following connections while power is supplied to the hardware!
1. Place the small opening on the front of the QNET Physics and Dynamics over the mounting bracket on the NI
ELVIS II.
2. Slide the PCI connector of the QNET Physics and Dynamics module end into the female connector on the NI
ELVIS II. Make sure it is connected properly.
3. Firmly fix the QNET Physics and Dynamics to the NI ELVIS II by screwing in the M4×22 mm anchoring screws
supplied.
4. Firmly attach the sliding mass arm to the QNET Physics and Dynamics by fastening the screws tightly. See
assembly instructions for details.
5. Connect the NI ELVIS II power cable.
6. Connect the NI ELVIS II USB cable to the PC.
7. Power the NI ELVIS II by turning ON the System Power Switch on the rear panel.
8. Turn ON the Prototyping Board Power switch, ID #2 shown in Figure 3.1.
9. The Power and Ready LEDs on the NI ELVIS II unit should be lit as shown in Figure 3.2.
10. Verify that the +5V LED on the QNET Physics and Dynamics is lit green. It indicates that the QNET Physics
and Dynamics has been properly connected to the NI ELVIS II unit.
QNET PHYSICS AND DYNAMICS - User Manual v 1.0

Figure 3.2: Ready and Power LEDs on NI ELVIS II
QNET PHYSICS AND DYNAMICS - User Manual 12

4 Troubleshooting
4.1 General Software Issues
Q1 When I try to open a QNET Physics and Dynamics VI, it says there are some missing VIs and they have a CD
or Sim in the name?
The LabVIEW™ Control Design and Simulation Toolkit is not installed.
Q2 When I open a QNET Physics and Dynamics VI a message prompts that a VI with ''ELVIS'' in the name cannot
be found?
The QNET Physics and Dynamics VIs use the ELVISmx drivers. Make sure you install the contents of the NI
ELVIS II CD before attempting to open any of the QNET Physics and Dynamics VIs (available for download at
www.ni.com).
4.2 General Hardware Issues
Q1 The +5V LED on the QNET Physics and Dynamics is not lit.
Make sure both the System Power switch, which is located on the back of the NI ELVIS II unit, and the Prototyping
Board Power switch, which is situated on the top-right corner of the NI ELVIS II, are ON.
Q2 The Ready LED on the NI ELVIS II does not go on.
(a) Go through the NI ELVIS II setup procedure outlined in the QNET Physics and Dynamics Setup Guide
(b) Once completed, launch the Measurement & Automation Explorer software.
(c) As illustrated in Figure 4.1, expand the Devices and Interfaces and NI-DAQmx Devices items and select
the NI ELVIS II device.
(d) As shown in Figure 4.1, click on the Reset Device button.
(e) Once successfully reset, click on the Self-Test button.
(f) If the test passed, reset the NI ELVIS II (i.e. shut off the Prototyping Board switch and System Power switch
and turn them back on again). The Ready LED on the NI ELVIS II should now be lit.
Figure 4.1: Reseting and performing the self-test on the NI ELVIS II
QNET PHYSICS AND DYNAMICS - User Manual v 1.0

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Quanser QNET add-on boards for the NI ELVIS platform teach introductory control topics in undergraduate labs cost-eectively.
All QNETs are oered with comprehensive, ABET*-aligned courseware that have been developed to enhance the student
learning experience.
To request a demonstration or quote, please email [e-mail].
*ABET Inc., is the recognized accreditor for college and university programs in applied science, computing, engineering, and technology, providing leadership and quality assurance in
higher education for over 75 years.
©2015 Quanser Inc. All rights reserved. LabVIEW™ is a trademark of National Instruments.