123 - 67164B
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TECHNOLOGY
AND SCIENCE KITS
IT
INTRODUCTION:
The TASK range is intended to provide supported and relevant learning opportunities to
students on science, technology and engineering programmes. The products extend across a
wide range of ages and abilities. They are adaptable, simply constructed, robust and easy to
use. The onus on design has been for repeatability, conceptual application and quality.
User Guide
The assembly documentation sent with the equipment is in two parts; these are for:
1) The Teacher (Pages 1T to 8T)
Some TASK equipment may already be built and tested in which case this guide will give
basic instructions for installation. Other TASK equipment may be in kit form the aim of the
Teacher guide in this case is to give instructions of how to get the equipment up and running,
from the kit form you receive it in, up into student modules. Some of the assembly may be
beyond the ability of many students, some may not; this decision is left to the practitioner.
Flexibility is the key.
The second aim is to give you, the practitioner, an insight into the equipment and its potential
uses rather than being a totally prescriptive text. This is mainly due to the myriad of technology
courses and levels that the equipment is suitable for, and to allow for adaptability and
flexibility. In the light of this TecQuipment produces student work programmes for specific
courses which are mapped against curriculum, syllabi or, in the case of NVQ and GNVQ, units
and elements.
This document should be retained for future reference as it contains information relating to the
safe use and maintenance of the equipment (where applicable).
2) The Student (Pages 15 to 25)
The Students Guide is intended to provide a basic guide to setting up the equipment. Exact
experimental procedures are left to either the practitioner, using this document for reference,
or those found in the TecQuipment student work programmes. This allows the sheets to be a
"universal guide" which can be used across courses and abilities.
2T
THE EQUIPMENT:
The bulk of the equipment is based around a frame, which has a grid of holes of 6.4mm
diameter on a 10mm pitch. This grid comes in two forms: the first is the miniframe, which can
be stood upright using its bolt on feet or laid flat on a workbench. The second is the universal
frame, which can be stood upright on a workbench, using the same bolt on feet as the
miniframe, but can also be clamped to the edge of the workbench (up to 80mm (3") thick) to
provide a sturdy working base. Other equipment is stand-alone and does not rely on having a
frame although the same design concepts have been used throughout.
The equipment can be split into four main functional groups indicated by a colour; these are:
Blue
-
A base or frame, i.e. the universal frame or miniframe
White
-
Instrumentation, control and electrical
Yellow
Red
Experimental components - mainly stationary or passive
Experimental components - mainly rotational, speeding, or containing energy
REFERENCE:
The following books are helpful in providing theory and background information on the topics
covered by this kit:
GNVa in Engineering
Edited by N. Lehup
Longman
GNVa in Science
Edited by N. Lehup
Longman
Motor Vehicle Engineering Science
by S. J. Zammit
Longman
Engineering Science
by E. Hughes and C. Hughes
Longman
Post 16 Publications
TechnologyEnhancement Programme
14 - 16 Publications
Technology Enhancement Programme
TO GNVO Delivery Modules
TecQuipment Limited
3T
THE COMPOUND PULLEY KIT SHOULD CONTAIN:
~
~
A Pulley Block ~
Back Plate
~
A Pulley Block ...S"\ 2 Moving Retaining
Front Plate
~
Plates
[...~==::]
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A Pulley ASSembIY
A Pulley ASSembIY
A Pulley ASSembIY
(Large)
(Medium)
(Small)
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4x
5 18mm
Spacers
5X~
II
M3
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8 Fixing Rings
(2 Spares)
8X~
A Cord Assembly
t;f:;;
A Nut and Bolt
Kit
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4T
1. Take out 3 of the Spacers and squeeze 2 Fixing Rings onto each one leaving a gap in
between each Ring.
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2. Attach 2 Spacers with fixing rings onto one of the Moving RetainingPlates as shown. Now
attach the other Moving Retaining Plate to the Spacers with the Small Pulley Assembly in
between.
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3. Attach 1 Spacer with fixing rings and 2 Spacers without fixing rings onto the Pulley Block
Front Plate in the positions illustrated. Now attach the Pulley Block Front Plate to the Back
Plate with the Mediumand Large PulleyAssembliesin betweenas shown below.
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to.
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4. Attach the 4 Hex. Pillarsonto the bottomof the HousingAssemblyas shown
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6T
Activity Overview
This Kit is designed to allow students to explore pulley and compound pulley systems.
Students can observe the velocity ratio, and measure the mechanical advantage and
efficiency of a 2 and 3-pulley system.
Useful Info and Data
Pulley systems are simple machines, which have been used for centuries for lifting heavy
loads. A considerable number of pulley sets or blocks that had been used to raise sails, were
recovered when the Mary Rose was raised in 1982 after 440 years under water. Although
crude by modern standards, they were very useful and highly developed compared to other
machines of the time.
Pulley systems are still in widespread use today in the form of hoists and lifting gear.
Pulley Configurations and Formulae
u
Single Pulley
Velocity Ratio = 1
2 Pulley
VelocityRatio = 2
Effort
VelocityRatio = No. of Pulleys in System
Mechanical Advantage =
~
Effort
Efficiency (%) = Mechanical Advantaae x 100
VelocityRatio
3 Pulley
Velocity Ratio = 3
7T
1123 - 67164B I
I ---AD/d; ;1;;'-
THE EQUIPMENT:
The equipment consists of a pulley block in which there are 2 pulleys one larger, one smaller.
Both pulleys are allowed to run freely in bearings. This double pulley block is fixed to a TASK
miniframe; there is also a single "jockey" pulley block. A cord is used to link the pulleys in the
chosen configuration. Measurements are made by adding a number of weights to form a
known load. Weights are added incrementally on the "effort" , until with a slight impulse, the
load is lifted steadily and without stopping. The load is increased and the procedure is
repeated.
Basic method:
1) Set up the equipment as directed for a 2 pulley system
2) Add 100g to the load end (keep hold of the cord on the effort end!)
3) Add masses 10g at a time on the effort end until the load is pulled upward steadily and
without stopping.
4) Recordthe effort mass
5) Repeat steps 3 and 4 with loads of 2009, 3009, 4009 and 5009
6) Reconfigurethe pulleysto a 3 pulley systemand repeat the procedure
I
123 - 67164B
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123 - 67164B
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YOU WILL NEED THE FOLLOWING:
A TASK Miniframe
2 Wei.QhtSets
eb
eb
2x
~
And from the TASK Simple and Compound Pulley Kit:
~
~
A Double Pulley
Block
-
~
~
-
...>"'\ A Single "Jockey"
~
PulleyBlock
A Cord with Hook
Plate
ii~~:::i
I~~~f
1. Attach the Double Pulley Block onto the Miniframe at the very top as shown.
. 11;;
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28
2. Feed the Cord around the appropriate pulleys for a 2 or 3 pulley system followinQ the
diagrams below which show the path of the cord.
2 Pulley System
3 Pulley System
2x
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-
.
0
a
.
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NOW SEE YOUR TUTOR ABOUT HOW TO PROCEED.
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