Specifications

The AK-920 is an electronic stapling machine kit that you put togeth-
er. The kit is mechanically assembled by the user with no soldering
required.
In addition to the experience of building the unit, there is also an
overview of its operation, a block diagram, an electronic road map
showing the electrical circuits, and a troubleshooting section in case
of problems.
Recommended for ages 10 and up. It takes about 2 hours to build.
YOU WILL NEED:
• Screwdriver, phillips type, medium size
STAPLER KIT
Manufactured by
Elenco Electronics, Inc.
150 W. Carpenter Avenue
Wheeling, IL 60090
Copyright © 1998 Elenco Electronics, Inc.
WHAT IT IS
Contact Elenco Electronics if any parts are missing or damaged.
DO
NOT contact your place of purchase as they will not be
able to help you.
QTY DESCRIPTION
H 1 Mainframe (with all electronics and bottom)
H 1 Base
H 1 Staple Tray
H 1 Staple Banging Sub-Assembly
H 1 Left Side Sub-Assembly
H 1 Right Side Sub-Assembly
H 1 Clearcase
H 1 Re-load Button
H 1 Battery Cover
H 1 Staple Plate
H 1 Spring, 3” long
H 1 Staple Block
H 1 Pulley
H 1 Reloader Leverage Piece
H 1 Transfer Gear
H 1 Gear Retainer
H 1 Small Gear
H 8 Lockwashers
H 8 Flat Washers
H 8 Screws, 16mm long
H 7 Screws, 10mm long
H 1 Screws, 8mm long, 8mm head diameter
H 2 Screws, 7mm long, smooth top
H 2 Screws, 6mm long, 5mm head diameter
H 2 Screws, 6mm long, 4mm head diameter
PARTS LIST
OTHER AMERIKIT PRODUCTS
AK-920
2
753107
WARNING:
CHOKING HAZARD - Small Parts.
Not for children under 5 years.
!
!
AC Adapter A device which converts the electricity in your home
into a form that can run your stapler.
Battery A device which produces electricity from a chemical
reaction.
Electronics The science of electricity and its applications.
Gears Toothed wheels that interlock, used to transfer
motion.
Motor A device which produces motion from electricity.
mm Millimeter, a unit of measure. 25mm = 1 inch.
Pulley A wheel with a grooved edge, used to transfer force.
Rotation Turning in a circle.
Schematic A graphical representation of an electronic circuit.
Transistor An electronic switch.
Troubleshoot To find and fix a problem.
WORDS YOU SHOULD KNOW
TROUBLESHOOTING
1. How to avoid jams: Do not try to staple more than 14 sheets of
16 lb. bond paper (or 10 sheets of 20 lb. bond paper). Make sure
the stapler completes its cycle before removing paper from the
staple banger. Use quality alkaline batteries.
2. If no staples come out: Check that there are staples in the unit.
Also, if there are more than 105 staples (about a 2 inch strip) in
the unit then the long spring may get stuck, so make sure there is
at least 0.5 inch of open space in the staple tray.
3. As the batteries get weak: As the batteries get weak through
use the stapler may operate more slowly and may jam more often.
Replace the batteries.
4. Nothing happens when paper is inserted: The paper must trig-
ger the activator switch (which sticks up through the staple plate),
check that this is happening. Also check that the batteries are
installed correctly.
5. Some of the wires break off. Solder them if you have the nec-
essary tools and know how to do it.
If you need additional assistance, contact Elenco.
3
4
5 6
7
8
(SCHEMATIC DIAGRAM)
9 10 11 12
Elenco Electronics, Inc.
150 W. Carpenter Avenue http://www.elenco.com
Wheeling, IL 60090 e-mail: [e-mail]
[phone] Fax: [phone]
HOW IT WORKS
Also refer to the Block Diagram and the Electronic Road Map.
When paper is inserted into the unit the activator switch is triggered.
This switch controls transistors (electronic switches) on the circuit
board, which turn on the motor. The motor uses the electrical ener-
gy from the batteries to spin the small gear.
The small gear has 12 “teeth”. These interlock with 50 teeth on the
transfer gear, so spinning the small gear will also spin the transfer
gear.The transfer gear also has 12 teeth which interlock with 2 small
gears on the right side sub-assembly, which interlock with teeth on
the right side wheel.
The result of all these gears is that by the motor spinning the small
gear, the right side wheel will spin. But the turning speed will be dif-
ferent since the teeth ratios are different. If one gear has more teeth
than another then it will turn with less speed but with greater force.
Because of the teeth ratios, the small motor gear will spin 130 times
faster than the right side wheel but the wheel will spin with 130 times
as much force. This allows a small motor to be used.
The right side wheel is linked to the staple banging sub-assembly.
As the right wheel turns, the staple banger will push a staple from
the staple holder into the paper. The gears and wheel continue to
spin until the staple banger returns to its starting position, at which
time the “motor done sensor” (the switch which snaps into the right
side) is triggered. This sensor controls transistors on the circuit
board, which turn off the motor. The long spring advances the next
staple into position.
When the reload button is pressed, the staple tray is released so
that more staples may be added. If the stapler is currently jammed,
the motor will also be turned on but will spin in reverse. This will
return the staple banger to its starting position, and allow you to
remove the problem staples.
SHEET-IN
ACTIVATOR
SWITCH
MOTOR
CONTROL
CIRCUITRY
MOTOR GEARS
STAPLE-
BANGING
SECTION
MOTOR
DONE
SENSOR
BATTERIES
RE-LOAD &
RESET BUT-
TON
STAPLE
HOLDER
RELEASE
HOW TO USE IT
1. Load batteries: Detach the battery
cover and load 4 “AA” alkaline bat-
teries. Be sure the “+” and “-” mark-
ings on the batteries match those in
the battery case. Do not mix old and
new batteries. This unit can also use
an AC adapter (6V 600mA).
SPECIFICATIONS:
Staple type: Standard
Capacity: Up to 14 sheets of 16 lb. bond paper; 10
sheets of 20 lb bond
Power Supply: 4 “AA” alkaline batteries; accepts AC adapter
6V 600mA
Loading Capacity: Up to 105 staples (about a 2 inch strip)
4. How to clear jams: If your stapler
jams, press the reload button at
the top of the unit to release the
staple tray. Pull the tray out and
remove the problem staples. Push
the staple tray back gently until it
clicks into place.
See the Troubleshooting section if you have any problems.
3. Stapler operation: To activate
the stapler, simply insert paper
into the opening at the front of
the unit. The documents will
be stapled automatically. Your
stapler is designed to fasten
up to 14 sheets of 16 lb. bond
paper or up to 10 sheets of 20
lb. bond paper. Trying to sta-
ple more sheets at one time
may cause jams.
2. Loading staples: Press the
reloader button on the top of
the stapler. The staple tray
will be released. Pull it out
and load up to 105 standard
staples (about a 2 inch
strip). (WARNING: there
must be at least 0.5” of
open space in the staple
tray or the stapler may jam.)
Push the staple tray back
gently until it clicks into
place.
BLOCK DIAGRAM
ELECTRONIC ROAD MAP
Easy-to-build kit teaches you basic
mechanical and electronic circuits.
You will have fun building this kit
and learning how a tape player
works. Lesson manual teaches
magnetic recording, audio amplifier
theory, speed control, mechanical
switching, and much more. Clear
plastic case allows you to show
your friends your accomplishments.
Headphones included. Requires
two (2) “AA” batteries.
Stereo Cassette Player Kit
with Training Course
Model AK-250
Camera Kit
with Training Course
Now you can learn all about pho-
tography with your new 35mm
Camera Kit. Our training manual
will teach you everything you need
to know about light, film, speed,
exposure, development, and much
more. And best of all, you have a
working camera “you built” when
your finished.
Talking Clock Kits
with Training Course
This easy to build kit will teach you
how electronic voices are made.
Wake up to a choice of 3 alarm
sounds, rooster crow, buzzer or
cuckoo. Requires 2 “AA” batteries.
This is our most popular kit.
Our Telephone Kit will teach
you all about communications.
You will actually build your
own phone and be able to
make and receive calls. The
clear plastic case lets you see
all of the working components.
It even has flashing neon
lamps when the phone rings
Clear Telephone Kit
with Training Course
Model AK-540
Model AK-220 Model AK-750