College Park LTI BOSTON User manual

CLINICIANS MANUAL
BOSTON®
DIGITAL
ARM

CLINICIANS MANUAL
BOSTON®
DIGITAL
ARM

Thank you for purchasing a Boston Digital Arm
System. Please reference the following instructions
for setting up, wiring, laminating, attaching devices
and proper orientation of your new arm. Please
reference the software instructional CD for software
set-up programming.
©2017, College Park Industries, Inc. – 624 LIT MNL BDA 170607
BATTERY STATUS
INDICATOR
LAMINATION COLLAR
FREE
SWING
SWITCH
BATTERY
CHARGE
PORT
50MM
HUMERAL FRICTION
ADJUSTMENT CLAMP
POWER BUTTON
DATA PORT

WARNINGS
©2017, College Park Industries – 624 LIT MNL BDA 170607
Your safety and the safety of your patients is very important.
Please read the following safety warnings and review with your
patients thoroughly.
1. Never allow your Digital Arm to be immersed in water. If your
prosthesis does become immersed in water, power it down and
remove it immediately and contact your prosthetist.
2.Your Boston Digital Arm system does not require any additional
lubrication. Adding lubrication will damage the arm and void the
warranty.
3. Do not attempt to disassemble your Digital Arm, aside from
removing the battery. The Boston Digital Arm is a very precise
medical device and any modifications can harm the system and
will void the warranty.
4. Your Digital Arm is built tough enough to survive a fall. If you
land directly on the arm, the system will break the free swing
lock by design to ensure your safety. If this happens, contact
your prosthetist as soon as possible.
5. Sweat contains salt and can be very corrosive and can damage
many components. If sweat begins to run down inside your
prosthesis, contact your prosthetist for ways of avoiding any
damage.

Contents:
©2017, College Park Industries – 624 LIT MNL BDA 170607
Batteries & Charging 8
The Battery 9
Battery Installation & Removal 9
Battery Charger 10
Battery State of Charge Indicator 11
Charging the Battery 12
Terminal Device Power Board 13
The Input Connector Board 14
Inputs 15
The most Popular Input Configurations 16
Output Cables for Terminal Devices 18
Output Fuses 20
Selecting Cables for the TD and Wrist Rotator 20
Connections to the Motion Control Wrist Rotator 21
Installation of Motion Control Wrist Rotator into Boston Arm 22
Cutting the Forearm to Length 28
Leaving Forearm Attached to Frame 30
Removing Forearm from Frame 30
Reattaching Forearm to Frame 31
Sealing the Input Board 32
Connecting the Cover Board on the Drive Unit to the Input Board 34
Proper assembly of cover board to Input Board 34
Reattaching Forearm to Frame 35
The Lamination Collar and Clamp Ring 36
Orientation of the Lamination Collar 37
Internal Rotation 37
Positioning the Input Board in the Lamination Collar 38
Attaching the Collar to the Drive Assembly 38
Final Adjustment with the User 41
10

11
10
The Boston Digital Arm System is supplied with a removable
Lithium-polymer battery (BE360+). This battery supplies 2000
mAHr at 11.1 volts (nominal) for the elbow and 7.4 volts (nominal)
for the terminal device(s). For most users, one battery will last an
entire day depending on the prosthetic components, condition of
the battery and the frequency of use.
Batteries can be removed and replaced as necessary. To remove a
battery simply push the lock lever toward the elbow and gently lift
the front of the battery. Grasp the front of the battery continue to
lift until the battery is removed.
Installing a battery is the reverse process. Place the rear of the battery
into the forearm first, align the two slots on the battery with the pins
inside the forearm frame. Once in position lower the forward edge of
the battery until it engages the locking tab and secures the battery in
place.
Upon receiving your Boston Digital Arm System, remove
the arm from the box, insert the battery into the forearm
and connect the battery to the battery charger to ensure
functionality of the device.
Batteries & Charging
The Battery
Battery Installation and Removal
BATTERIES & CHARGING

3 GREEN BLINKS
100%
charged
2 GREEN BLINKS
70%
charged
1 GREEN BLINK
30%
charged
STEADY RED
Battery Fully
discharged
BLINKING RED
Battery Fault
technical service
13
12
Boston Digital Arm Systems are supplied with a Fast Charger
(BE366+) for the Lithium polymer battery. The BE366 Fast Charger
is recommended for daily use and will assure that the battery will
receive a full charge and provide maximum running time.
The Boston Arm Lithium battery (BE360) is equipped with a state-
of-charge indicator. This indicator tells the user how much life is left
in their current battery. To activate this feature, depress the battery
on-o switch to turn the battery on and view the indicator light
through the lens on the side of the battery. The number of blinks at
turn-on indicates the state of charge.
Battery Charger Battery State of Charge Indicator
BATTERY STATUS INDICATOR
BATTERIES & CHARGING
BATTERIES & CHARGING

3 GREEN BLINKS
100%
charged
2 GREEN BLINKS
70%
charged
1 GREEN BLINK
30%
charged
STEADY RED
Battery Fully
discharged
BLINKING RED
Battery Fault
technical service
15
14
The Boston Digital Arm System (BE300) was designed to
operate the elbow and accommodate electric hands, Greifers,
electric terminal devices, multi-articulating hands and wrist
rotator.
The Boston Arm Lithium battery BE360+ has a 7.4V 5+ Amp
output capable of supporting the high current demand of multi-
articulating hands.
Terminal Device Power Board
BATTERIES & CHARGING
BATTERIES & CHARGING
The battery should be recharged regularly, typically daily (depending
on use). If the battery discharges to the point where the elbow
“low battery” alarm sounds, the system turns o immediately and
requires battery charging or replacement. Battery may be charged in
or out of the prosthesis.
To recharge the battery, turn the prosthesis o and insert the recharge
plug into the receptacle located next to the state of charge indicator.
Plug the charger into an electrical outlet and observe the light on the
charger.
A full charge can take up to 75 minutes depending on the battery’s
state of charge.
Batteries must not be over-discharged. This can occur when leaving
the battery on indefinitely when the prosthesis is not in use or due to
self-discharge due to lack of use. This can cause permanent damage to
the battery.
Alternate use of (2) BE360’s supplied with each arm every month to
keep them in good condition. Leaving one battery in storage will lead
to a self discharge condition requiring service or replacement.
Charging the Battery

17
THE INPUT CONNECTOR BOARD
16
There are 9 plug receptacles on the input board. Each
receptacle has a corresponding label which describes
which type of input it accepts. The table below lists the
label name, the purpose of that receptacle, as well as the
functions of the 4 pins on each receptacle.
The Input
Connector
Board
Inputs
Connection Labels
The labels here are those used in the table on the following page. In
most cases the cables that attach to a particular point will also have
the same label.
MD
MC
D12
A34
A12
X12
D34
MY1
MY2
LABEL
MY1
MY2
A12
A34
D12
D34
MC
MD
X12
PURPOSE
Myoelectric Input#1
Myoelectric Input#2
Analog Inputs 1&2
Analog Inputs 3&4
Digital Inputs 1&2
Digital Inputs 3&4
Output to Motor C
Output to Motor D
To XTR on Circuit Board
+5.0V
+5.0V
+5.0V
+5.0V
+5.0V
+5.0V
(+12V )*
(+12V )*
+5.0V
PIN 1
0.0V Ground
0.0V Ground
0.0V Ground
0.0V Ground
0.0V Ground
0.0V Ground
0.0V Ground
0.0V Ground
Remote On
PIN 2
Analog 5
Analog 6
Analog1
Analog 3
Digital 1
Digital 3
Motor C1
Motor D1
Extra 1
PIN 3
Myo Input 1
Myo Input 2
Analog 2
Analog 4
Digital 2
Digital 4
Motor C2
Motor D2
Extra 2
PIN 4

19
18
When attaching cables, note that with the proper orientation,
the wires will always face the center hole of the Input Board.
The connectors are “keyed” or asymmetrical to assure proper
alignment. The connector should snap into place between the
two black plastic clips.
When removing cables, avoid pulling on the wires. Wires that
become loose could cause intermittent operation. Using a small,
pointed tool such as a small flat head screwdriver, push to release
the black plastic clip on one side of the connector and then the
other. This will free the connector and allow for easy removal by
hand.
The Most Popular Input Configurations
THE INPUT CONNECTOR BOARD
THE INPUT CONNECTOR BOARD
Single myoelectrode
Use MY1 only
Two myoelectrodes, switch
Use MY1, MY2;D12
Three dual-action switches
Use D12, D34;A12
Two myoelectrodes
Use MY1, MY2
Single dual-action switch
Use D12
Three Touch Pads
Use A12, A34
Two myoelectrodes, servo
Use MY1, MY2;A34
Two Dual-action switches
Use D12, D34
Four Touch Pads
Use A12, A34

21
20
The “HANDS” receptacle is used to attach
any 4-wire device requiring both a power input
of 7.2V nominal and open and close signals.
These are classified as hands with electronics
and include Bebionic, Touch Bionic, Steeper
Myo-Select and Otto Bock DMC+ and Sensor
hands.
The “XTR” receptacle is used for TMR and or
Hybrid applications. The BE343 cable plugs in
here.
The receptacle, labeled “SERVO”, is reserved
for the position feedback from a servo hand and
only used with custom configurations.
This receptacle labeled W/H (for Wrist/Hand)
accepts cables powering the wrist rotator and
any hand or gripper without electronics. Both
outputs H and W are variable PWM for direct
motor control. There are three cables associat-
ed with this receptacle:
• Use the BE243 Cable, Bock Hand or Greifer
for a simple electric TD with Bock QD, and
connect it to the 2-pin connection point on the
Bock 9E169 Coaxial Plug.
• Use the BE247 Cable, Hand and Wrist when
a wrist rotator is also to be used.
• Use the BE244 Cable, Wrist Rotator if only
the wrist rotator requires PWM power as when
using a 4-wire hand, gripper or split hook.
OUTPUT CABLES FOR TERMINAL DEVICES
There are four (4) output connectors on distal end of
control board defined as shown:
Output Cables for
Terminal Devices

23
22
The Boston Digital Arm-Plus has four (4) fuses protecting the
motor outputs. If one of these fuses blows, it is an indication
of a problem and the entire prosthetic system should be
returned to LTI for evaluation
The BE247 Cable, PWM Hand and MC Wrist Rotator has two
2-socket connectors. The connector labeled WRIST is attached to
the posts labeled WRIST. The connector labeled HAND is attached
to the post labeled HAND.
When using powered wrist and a hand with electronics, the
BE244 cable is used for direct control of the wrist and plugs
into the wrist port.
The BE343 cable is used for hands with electronics and has two
3-position connectors that plug into the CHA and CHB ports.
With the Ottobock Quick Disconnect Wrist, cables connect using
the Bock 9E169 Coaxial Plug for only a TD or a wrist rotator when
2 functions are required. The table below guides you to order and
install the correct connecting cables.
Output Fuses Connections to the Motion Control Wrist Rotator
Selecting Cables for the TD and Wrist Rotator
OUTPUT CABLES FOR TERMINAL DEVICES
OUTPUT CABLES FOR TERMINAL DEVICES
WRIST
HAND
CATALOG NUMBER and DESCRIPTION
BE243 Cable, Bock QD, Hand (8E12/*E37) or Greifer (8E32) Only
BE244 Cable, BockQD, Wrist Rotator
BE247 Cable, Bock QD, PWM Hand (8E37) and Wrist
BE343 Cable, Bock QD, 7.2V TD, Sensor Hand (8E38), Greifer (8E33)
Bebionic, iLimb Ultra, Quantum, ETD-Pro, etc.
W/H
W/H
W/H
HANDS
Bock 2-Socket
Bock 2-Socket
(2) Bock 2-Socket
(2) Bock 3-Socket
RECEPTACLE DISTAL PLUGS

25
INSTALLATION OF MOTION CONTROL WRIST ROTATOR
24
Installation of Motion
Control Wrist Rotator
into Boston Arm
Components Required:
MC Wrist Lamination
PN:4050231
MC Wrist Rotator
PN:405192 SN:xxxx
The Motion Control wrist rotator is the most commonly used with
the Boston Digital Arm System. In the following pages, we will cover
the steps necessary to integrate this wrist rotator into the Boston
Digital Arm.

27
26
Installation
INSTALLATION OF MOTION CONTROL WRIST ROTATOR
INSTALLATION OF MOTION CONTROL WRIST ROTATOR
1. Determine the forearm length for your patient.
The minimum Boston Arm forearm length is approximately 9 5/8” (with
powered wrist rotator. It can be shorter if using non-powered QD wrist.)
as measured from the center axis of the elbow to distal edge of wrist
lamination.
2. Cut and trim forearm to appropriate length. A minimum of 2 1/16”
is required from distal edge of control board to edge of cut forearm.
This should prevent wrist rotator from contacting the board.
(see page 26)
3. Insert the MC wrist rotator into the lamination collar and secure
with one mounting screw. Slip the LTI wrist spacer over the
lamination collar and perform a dry fit of the assembly in the
forearm. Verify the rotator does not contact the distal end of the
control board.
4. Remove and separate the rotator from the lamination collar.
5. Carefully laminate the wrist spacer insert and lamination collar into
forearm.

29
28
Boston Arm Cable Connections to
Motion Control Wrist:
INSTALLATION OF MOTION CONTROL WRIST ROTATOR
INSTALLATION OF MOTION CONTROL WRIST ROTATOR
1. Connect (1) BE244 Cable from the Boston Arm “H/W” plug
to the “Wrist” position pins of the MC wrist. The curve of the
2-position socket connector should face inward toward the center
of the wrist.
2. Connect BE343 Cable from Boston Arm “Hands” plug to “CH-A”
and “CH-B” positions on the wrist. The curve of both 3-position socket
connectors should face inward toward center of wrist.
3. Once cable connections are in place, carefully insert the wrist into
the forearm and secure with the 5 Phillips screws provided.
The rotator has 2 connector locks, 1 on each side of the end cap. These
are the flat plastic components secured by 2 screws to the end of the
rotator. Do not tamper with these screws. Press the locks inward to
remove the connectors from the wrist.
A typical Motion Control Wrist Rotator Installation

31
CUTTING THE FOREARM TO LENGTH
30
Cutting the Forearm
to Length
Forearm Wrist Size Inside Diameter - 50mm
50 mm standard wrist rotator is the only unit compatible with Boston Arm.
Length of Forearm Before Cutting - 14”
Minimum Length from Center of Elbow Rotation to Distal End of Wrist Unit
(without wrist rotator) - 8 ½ “or (216mm)
(with wrist rotator) - 9 ¼ “or (235mm)
Minimum Coupling Collar Distance - To Bottom of Elbow - 2.80 “
Minimum Distance Residual Limb - To Elbow Center - 1.75 “

33
32
Leaving Forearm Attached to Frame Reattaching Forearm to Frame
Removing Forearm from Frame
INSTALLATION OF MOTION CONTROL WRIST ROTATOR
INSTALLATION OF MOTION CONTROL WRIST ROTATOR
The forearm can be removed from its frame prior to cutting, although
it isn’t necessary. If cutting the forearm to length with the forearm and
frame intact, follow these precautions.
• Stu the distal end of the forearm (proximal to the desired length) with
a piece of foam or a cloth to prevent dust or debris from entering the
battery cavity.
• It is also important to avoid subjecting the system to excessive vibration
such as that caused by a carbide-tip saw blade or a sanding belt/disk.
Generally, a band saw is preferred for this process.
Insert the circuit board/elbow assembly back into the forearm. Align the
recessed holes of the frame with the corresponding holes on the forearm
attachment plates. Apply a small amount of Blue medium strength Loctite
#242 to the threads of the 8-32 x 3/16” Flat head screws and reinsert.
Tighten using an oset (right-angle) screwdriver.
The forearm can be removed from the frame prior to cutting the distal end
to the desired length. However, caution must be taken in this process to
avoid stressing or distorting the circuit board. The forearm is attached to
the frame via an attachment plate. On each side of the attachment plate
are two 8-32 x 3/16” flat head screws. Removing these screws will release
the forearm from the frame. Take these precautions when removing the
forearm from its frame.
• Carefully spread forearm hinge covers to clear forearm frame, free swing
button and cross elbow wiring. Slide forearm away from elbow until clear
of elbow assembly. (Re-assemble in reverse order)
• Protect the circuit board from dust and debris
• Avoid static electricity that may damage the electronics. It is best to
perform this operation on an anti-static mat while wearing an anti-static
wrist or ankle strap.

35
SEALING THE INPUT BOARD
34
The Input Board must be sealed before final assembly of socket
The Input Board is held in place by an O-ring that also
acts as a seal to prevent sweat and dirt from entering the
area with the plugs. It is important to seal the area where
the wires pass through the rubber backing on the Input
Board. This area should be sealed with silicone tub sealant
or equivalent.
Sealing the Input
Board
Seal the hole where the wires pass through the rubber backing. Use silicone
tub seal or equivalent.

37
36
Connecting the Cover Board on the
Drive Unit to the Input Board
Reattaching Forearm to Frame
Proper assembly of cover board to Input Board
SEALING THE INPUT BOARD
The Cross-Elbow wiring connects to the input board above the elbow.
Figure 4 shows the Cover Board next to the Input Board. To connect,
align the three connectors over the three (3) groups of pins. Carefully
press together until cover board snaps into groove on input board.
Insert the circuit board/elbow assembly back into the forearm. Align the
recessed holes of the frame with the corresponding holes on the forearm
attachment plates. Apply a small amount of Blue medium strength Loctite
#242 to the threads of the 8-32 x 3/16” Flat head screws and reinsert.
Tighten using an oset (right-angle) screwdriver.
SEALING THE INPUT BOARD
Cover Board before assembly onto Input Board.
Gently pry the Cover Board from the Input Board assembly. Pry first one
one side and then on the other side to avoid bending the connector pins.
The photo on the left shows a simple twist in all three wires on the Cover
Board. The photo on the right shows what happens when the board is
rotated. The twist avoids having the wires bunch up during humeral rotation.
A mark (see arrow) may be added to assist in aligning the Cover Board and
Input Board.

39
THE LAMINATION COLLAR AND CLAMP RING
38
The Lamination Collar
and Clamp Ring
Lamination Collar Humeral Friction Attachment Clamp
Orientation of the Lamination Collar
Internal Rotation
The humeral rotation stop pins provide a range of 270° for internal and
external rotation. The normal range of human motion is 30° externally
and 135° internally.