Teachergeek Ping-pong ball launcher User manual

Unleash Your Creativity!

™

Example Ping-Pong

Ball Launcher

Ping-Pong Ball Launcher ™

Part Description QTY Picture

Long Link Strip 10

Dowel 5

Perpendicular

Adaptor 15

Paper Cup 2

Rubber Bands ~4

#12 Screws 6

Slide Stop Material 2

Inches

Additional Equipment Needed

Part Description QTY

TeacherGeek

Easy Engineering Tool Pack 1

Additional Supplies Needed

Part Description QTY

Ping Pong Ball 1

String 1 roll

Rulers 1/student

Masking Tape 1 roll

Paper Clips 1/student

Card Stock Sheets (heavy weight paper) 1/student

SAFETY GLASSES 1/student

Think Safety! Wear safety glasses when working

on or using your launcher.

Parts List (parts for each launcher

Ping-Pong Ball Launcher ™

Don’t think of this as a kit. Think of it as a bag full of endless solutions. Although

the end of this guide contains step-by-step instructions for creating a launcher,

we encourage you (your students) to try and develop new and different designs.

Because, in design and engineering, there is never one right answer…

TeacherGeek Easy Engineering Series products are designed to encourage innova-

tion and alternative designs. We encourage you to use the Easy Engineering Com-

ponents to create your own brilliant solutions.

Because, your rst idea is rarely your best…

TeacherGeek Easy Engineering Series products are designed to be redesigned;

they allow you to quickly change and evolve your designs.

Because, possibilities are endless…

TeacherGeek Easy Engineering Components can be easily combined with other

materials and products (Raid the recycling bin, wood, metal, broken toys, etc.)

“Kit” Can Be a Bad Word:

Other Documents That Will Help You With This Activity:

Document: Path: Access Code:

Easy Engineering Guide teachergeek.org/easy_engineering_guide.pdf No Code Required

Launcher Protractor teachergeek.org/protractor.pdf No Code Required

Easy Engineering Ruler teachergeek.org/ruler.pdf No Code Required

Download

Dowels vary in diameter because they are made of wood.

We have provided you with extra dowels to make up for

dowels which may be too large or too small to use.

Ping-Pong Ball Launcher ™

Reaming Holes

A Slide Reamer makes it easier

to push or pull a dowel through

a hole.

*Having trouble getting a dowel

into a hole? Ream it with the

Slide Reamer.

The Loose Reamer creates

a hole that dowels can freely

rotate in and slide through.

A loose t is typically used

to support axles, wheels and

pulleys. It is also used for

pivot points.

Learn how to

use a reamer

on page 5

Easy Engineering™Components come with holes that are the perfect size for a press

t with dowels.

Dowels and Holes

A press t is one where the dowel is xed and not

able to rotate or slide once it’s in the component

hole. A press t is good for creating rigid structures.

Press ts are good for

structural connections.

Press ts are good

for gears, pulleys

and levers that turn

together on the

same dowel (axle).

Slide Fit

Loose Fit

The Loose Reamer cre-

ates a hole that is larger

than the dowel.

The dowel moves freely

in the loose tting hole.

This hole in the perpendicular

adaptor was reamed with the Slide

Reamer to make it easier for it to

slide to the middle of the dowel.

The crank and pulley are

press t onto the same dowel

(so they turn together).

The link strip holes that the dowel needs to

rotate in were reamed with the Loose Reamer.

Ping-Pong Ball Launcher ™

Pull and push the

reamer in and out

of the hole.

Turn the reamer

inside the hole.

To further enlarge a hole, as you ream

it, move the end of the reamer around

so it is not in line with the hole.

How to Ream Holes Screws

Slide-Stop Material

Slide-Stop

Material keeps

dowels from

sliding back

and forth in

“loose” reamed

holes.

Slide-Stop Material comes in long lengths.

It must be cut into 6mm (~1/4”) sections

before it can be used.

Slide-Stop Material keeps components with “loose”

reamed holes from sliding back and forth on dowels.

Screws can be used to attach two

components together.

The hole the screw

will enter rst must be

reamed “loose.”

The hole the

screw will enter

second should

not be reamed.

Turn the screw into

both components.

*Be careful not

to over-tighten

the screw and

strip out the

bottom hole.

Tighten the screw

completely to

keep components

from rotating.

Leave the screw a ¼ turn from tight

to allow components to rotate/pivot.

Ping-Pong Ball Launcher ™

45mm

90mm

25mm

180mm

150mm

45mm

Cut your dowels to length.

Dowel

Length:

Dowel

Quantity:

25mm 1

45mm 8

90mm 1

150mm 2

180mm 1

60mm

195mm

52.5mm

120mm

Cut your link-strips to length.

Length: Quantity:

52.5mm 1

60mm 2

120mm 1

195mm 2

Step 1: Cutting dowels

Step 2: Cutting Link-Strips

Ping-Pong Ball Launcher ™

Step 4: Assembling The Body

45mm

90mm

Step 3 nished

Step 3: Assembling The Body

Fasten the two 195mm linkstrips ( Aand B), to the

52.5mm linkstrip ( C) with 2 screws.

Fasten 2 perpendicular adaptors ( Dand E) to the

195mm link-strips ( Aand B) using 2 screws.

Place dowels into linkstrips (as shown).

Push the 45mm dowels down below the linkstrips into

perpendicular adaptors from step 3 ( Dand E) and

new perpendicual adaptors ( Fand G).

195mm

52.5mm

195mm

52.5mm

Ping-Pong Ball Launcher ™

Step 6: Assembling The Body

Place the reamed perpendicular adaptors from step 5 ( Band C)

and two 60mm linkstrips ( Dand E) onto dowels ( F).

Step 5: Reaming “Loose” Holes

Ream hole

Ain 2 perpendicular adaptors. Use the

“loose” reamer.

Step 6 Finished

x 2

Ping-Pong Ball Launcher ™

Step 8: Creating a pivot point

Step 7: Reaming “Slide” Holes

Ream holes Aand Bin a perpendicular adaptor. Use

the “slide” reamer.

Ream holes Cand Don the the the launcher body.

Use the “slide” reamer.

Step 8 Finished

Place 45mm dowel ( E) into a perpendicular adaptor ( F).

Place the assembled 45mm dowel and perpendicular

adaptor ( G) into the launcher body ( H).

45mm

Ping-Pong Ball Launcher ™

Attach the body ( H) (from step 8) to the

base ( I) (from step 9) using 2 screws.

25mm

180mm

150mm

120mm

Assemble the 150mm dowel ( A), 180mm dowel ( B),

120mm link-strip ( C) and 3 perpendicular adaptors

(D) as shown.

Create a pivot point placing 25mm dowel ( F) through

2 perpendicual adaptors ( E) on either side of linkstrip ( C).

2Finished

Step 9: Assemble The Base

Step 10: Attaching THe Base To The Body

Use the “slide” reamer to get components

to slide onto the dowels

Ping-Pong Ball Launcher ™

Step 11: Fold it Up

Step 12: Assemble and Mark The Ram

Fold over the assembly from step 10 onto itself.

Slide the perpendicular adaptor Aonto dowel B.

Place a 10mm section of slide-stop material ( C) and a perpen-

dicular adaptor ( D) on the end of a 150mm dowel ( E).

Draw a black mark on the dowel every 5mm, starting from.

Marks Every 5mm

Ping-Pong Ball Launcher ™

Step 13: Inserting The Ram

Step 14: The Rubber Band

Step 14, Finished

1Insert the ram ( A) (from step 12) into the “loose”

reamed holes in the launcher body ( B).

Attach the rubber band ( C)..

Ping-Pong Ball Launcher ™

Step 16: Creating an Angle Finder

Step 15: Adjust The Angle

Cut a 4” wire. Bend it so the end hooks around at the end ( C).

Cut a protractor ( D) from the Launcher Protractor Sheet. Punch a hole

in the middle of the circles in the upper left hand corner of the protrac-

tor. You can download additional protractor sheets at:

http://www.teachergeek.org/protractor.pdf *best printed on cardstock

Place the hook end of the wire into the hole in the corner of the protractor.

You can change the angle of your launcher

by sliding the perpendicual adaptor Aup and

down the dowel B.

Ping-Pong Ball Launcher ™

Tape or glue the angle nder ( F) (from step

16) onto the 90mm dowel on the launcher.

The straight lines on the side of the angle

nder must be parallel with the dowel

Step 17: Attaching The Angle Finder

Step 18: Using The Angle Finder

Make sure that the wire hanging in

front of the angle nder ( C) is per-

fectly straight. Set the launcher on a

table top. The angle of the launcher

is the number the wire falls to on

the protractor.

Ping-Pong Ball Launcher ™

Tip: Numbering The Ram Markings

The markings on the ram allow you to measure

the distance the ram is pulled back prior to

ring. It is a good idea to sequentally number

the ram marks. You can use them to adjust the

power of the ram, and to re consistantly.

It’s time to start shooting ping-pong balls!

Your Launcher is Complete!!!

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