A guide to Lego Technic
A guide to Lego Technic-Mike Webster
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soundMikewebster comes in Bounce effect.1
Introduction
By sliding
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Narration- Hi!. I am SPYBOT. I am here to tell you all about
Lego Technic. Lego Technic is a branch of Lego that deals with
mechanics. It is a very powerful system and you can create very
sophesticated machines. A lot of it is snap on and slide on. It
also gives special readymade parts like differential casings, or
turntables, or planetery gear systems. You can also use motors with
it to create motorized machines. Here are a few examples of the
snap on and slide on I was talking about.
2
Main parts
BeamCross AxleGearRight angled beamConnector Peg
Narration- The main types of parts in Lego Technic are the
beams, the axles or the cross axles, the gears and the special
types of beams that allow us to connect parts in right angles. To
connect parts, we use connecter pegs or axles with stoppers3
The basics
Narration- Here is a video showing how to do basic things in
Lego Technic such as connecting a peg to a beam, inserting an axle
on a gear, and using different types of pegs. To show you this, I
have used a special type of software called Lego digital designer,
which lets you simulate building with Lego on your computer4
Basic model systems
Here, you create a working gear train. The yellow parts seen at
the end are stoppers. The stop the axle from coming off the beam.
You can turn one of the gears, and you will see that the other gear
will turn too. This system provides 1:5 reduction if you turn the
small gear first, or 5:1 reduction if you turn the big gear
first.
This model is a working car.. This car cannot steer. It is more
complicated than the last model, but works just as well. You can
use different colored beams or different wheels
Narration- Now that you know how to do the basic connections,
here are a few model systems that you can easily make. These will
help you to get used to working with Lego Technic. Follow the
instructions shown perfectly.5
All about gears
Spur gears. These gars can be connected in a straight line.
However, if used with crown gears, they can be connected with right
angles. Available in 8, 24, and 40 tooth versions
Bevel gears. These gears can be connected in right angles with
other bevel , or double bevel gears. Available in 20, and 12 tooth
versionsCrown gears. These gears can be connected in right angles
with spur gears. Available in only a 24 tooth Worm gears. These
gears can be used with spur gears or double bevel gears for a very
high gear reduction. Double bevel gears. These gears can be used in
right angles or in a straight line. Available in 12, 20 and 36
tooth versions.
Narration- Gears are an important part of Lego Technic. The
allow the transfer and manipulation of torque and speed. The
different types of gears in Lego Technic are spur gears, bevel
gears, double bevel gears, crown gears and worm gears. 6
Hinge Systems
For relatively light applications, the readymade hinge parts can
be used.
For heavy duty applications, we use a custom hinge made of
beams. In the picture, I have also added a gear for controlling the
movement of the joint.
This is a universal joint which is usually used coupled with a
hinge, which allows rotation to be transferred over a hinge.
Narration- A lot of times, to maintain strength while allowing
freedom of motion, special hinge systems are used. If strong
enough, they can sometimes sustain the wait of an entire Lego model
without bending or breaking. Sometimes, gears can be used with
hinges to create controllable hinge systems
7
Turntables
This is the Lego large turntable. It has 56 teeth on the outside
and 24 teeth on the inside. A planetary gear system can be built by
using an 8 tooth gear as the sun gear and by using two 8 tooth
gears as the planetary gears
This is the small turntable which has 28 teeth. As it is small,
it can fit in small spaces and so is very versatile. But it is not
very good for supporting large weights.
Narration- A lot of times, for revolving mechanisms, turntables
are used. Most Lego turntables have gear teeth fo controlling the
turntable. Some turntables also have gear teeth for planetary gear
systems.8
DIFFERENTIALS AND STEERINGS
Here, the first picture is a standard non locking differential
using three 12t bevel gears and the differential casing. The second
version is the more complicated torsen differential, which is a
self locking differential.
Here, the first picture is a rack and pinion steering while the
other one is a very simple steering that I have developed
myself.
Narration- Lego Technic provides readymade differential parts
but you can also create custom torsen differentials. For steering
systems, you can either use standard rack and pinion steering
systems or create custom steering systems. 9
Motorization.
This is the micromotor. It is the smallest motor and spins at a
very low speed
This is the minimotor and is slightly bigger than the micromotor
but much more powerful
This is the geared motor and has an internal gear reduction
This is the dune buggy motor and has a very high RPM
This is the power functions small motor and is extremely
versatile and can produce good amounts of torque and speed.
This is the power functions large motor and can be mounted very
easily
This is the Power Functions XL motor and can deliver very high
amounts of torque
This is the Mindstorms large motor. It is comparable to the XL
motor but has an additional feature of being a servo motor
This is the Mindstorms medium motor and is also a servo motor.
It is comparable to the Power functions medium motor
Now that we have looked at the various types of Technic pieces,
let us have a look at motorization. The different types of motors
we can use are the Lego power functions motors, and the Lego
Mindstorms motors10
Thank you for watching
Narration-Thank you for watching. I hope you enjoyed my
presentation. If you found it useful, please Like it and share it
with your friends. My battery has started running low, so I need to
go charge myself. Goodbye11
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