Carpenter MFG. Co., Inc. Compu-Strip 75 User manual

Operator’s Manual
Model 75
Compu-Strip®
Production Wire Processing Equipment
Website: www.carpentermfg.com • Email: [e-mail]

Carpenter Model 75 Compu-Strip®
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Table of Contents
Introduction ...................................................................................................................4
Important Notice............................................................................................................5
Safety Notice .................................................................................................................6
Machine Contents .........................................................................................................7
Product Description and Specifications .....................................................................8
Section 1–Theory of Operation................................................................................10
Section 2 –Your New Model 75 .................................................................................14
2.1 Unpacking and Inspection ...................................................................................14
2.2 Shipping the Unit .................................................................................................14
2.3 Installation ...........................................................................................................15
2.4 Pre-Processing Checks .......................................................................................15
Section 3 –Mechanical Setup and Adjustments......................................................17
3.1 Safety Guard Installation and Removal ...............................................................17
3.2 Debris Tray Installation and Removal..................................................................18
3.3 Wire Guide Bushing Installation and Removal.....................................................20
3.4 Cutter Blade Replacement...................................................................................22
3.5 Gripper Blade Replacement ................................................................................25
3.6 Cable Centering Adjustments..............................................................................26
3.6.1 General Information................................................................................................. 26
3.6.2 Determining the Adjustment Direction.................................................................. 29
3.6.3 Performing the Centering Adjustments................................................................. 30
3.6.4 Notes Concerning Cable Centering ...................................................................... 31
3.7 Maintenance........................................................................................................32
3.7.1 General Maintenance.............................................................................................. 32
3.7.2 Bearing Adjustment and Lubrication..................................................................... 32
3.7.3 Replacement Parts .................................................................................................. 33
3.8 Guide Bushing Information ..................................................................................33
3.8.1 Stainless Steel Guide Bushing Sets...................................................................... 33
Section 4 –Programming the Model 75 ....................................................................34
4.1 The Model 75 Graphical User Interface...............................................................34
4.2 The Model 75 Keypad..........................................................................................35

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4.3 Edit Mode –The Key.................................................................................36
4.3.1 The Edit Screen Data Fields .................................................................................. 37
4.3.2 Example –Entering a Cable Strip Program......................................................... 43
4.3.3 Edit Mode –Special Function Programming....................................................... 46
4.3.3.1 Special Function Programming –Data Line Move Function...................46
4.3.3.2 Special Function Programming –Gripper Blades Only Strip Mode ........48
4.3.3.3 Special Function Programming –Cable Hold Mode...............................49
4.4 Menu Mode –The Key...............................................................................50
4.4.1 Process Options....................................................................................................... 51
4.4.2 Blade Change........................................................................................................... 53
4.4.3 Password Setup ....................................................................................................... 54
4.4.4 Reserved ................................................................................................................... 55
4.5 Memory Mode –The Key...........................................................................55
4.5.1 Memory RECALL Mode.......................................................................................... 56
4.5.2 Memory STORE Mode............................................................................................ 57
4.5.3 Memory ERASE Mode............................................................................................ 59
4.5.4 Memory LIST Mode ................................................................................................. 60
4.6 Batch Mode –The Key...............................................................................61
4.6.1 Normal Mode............................................................................................................. 62
4.6.2 Batch Mode............................................................................................................... 62
Section 5 –Processing Cables ..................................................................................64
5.1 Processing Cable Ends .......................................................................................64
5.2 Stopping a Strip Cycle.........................................................................................65
5.3 Clearing Debris from the Wire Guide Bushing.....................................................66
5.4 Notes on Processing Cables................................................................................67
Section 6 –Warranty...................................................................................................68

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Introduction
Thank you for choosing Carpenter Mfg. Co., Inc. for your wire processing equipment
needs. For over 60 years Carpenter has been a leader in wire processing technology
and service. As an independently-owned, third generation company our philosophy has
always been to provide the customer with both quality products and outstanding service.
We look forward to a long, healthy relationship with you and our company.
Every attempt has been made during the development of this operator’s manual to
include all relevant information pertaining to the operation and maintenance of the
Model 75 Compu-Strip® in an easy-to-read and easy-to-apply format. However, the
Model 75 is a complex piece of equipment and certain inaccuracies or typographical
errors may inadvertently be contained within these pages. Carpenter Mfg. Co., Inc.
shall not be held liable for these errors. We welcome customer input concerning this
operator’s manual. If you should find an error or have a suggestion on how this manual
could be enhanced, please feel free to contact us. Our phone number is (315) 682-
9176; we may also be reached by fax at [phone]. Visit our website
(www.carpentermfg.com), or contact us via email ([email protected]).
The Model 75 is a fully programmable wire and coaxial cable stripper that is designed to
strip a wide range of wire and cables, as referenced on the following pages. A great
amount of work has gone into the development of the Model 75, in order to offer a
product that is universally applicable to stripping the many varied types of cables within
its range of specifications. There may, however, be cables that fall within the Model 75
operating range that do not process satisfactorily on the Model 75. This may be due to
many factors, including but not limited to, cable construction, poor cable/material quality,
and/or required strip specifications. To determine if the Model 75 will satisfactorily
perform the stripping requirements, Carpenter Mfg. Co., Inc. strongly recommends a
free wire evaluation, to be completed at our factory (http://carpentermfg.com/wire-
evaluation/). A demonstration from a Carpenter representative is also recommended to
ensure the ultimate success of your wire processing application.
This operating manual explains how to operate the Model 75 Compu-Strip®. To ensure
the best performance of your machine, read this manual carefully until you familiarize
yourself thoroughly with its operation and features. After you have read through the
manual, keep it available for reference.
Carefully unpack the Carpenter Model 75 Compu-Strip®. We recommend that you
keep the original box and packaging as it will protect the machine for future
transportation, if necessary.

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Important Notice
The products in this shipment left our facility in good working condition. Their safe
delivery is the responsibility of the carrier that delivered this shipment to you. Our
stated shipping terms are F.O.B. our facility at 110 Fairgrounds Drive, Manlius, NY
13104. According to applicable laws, the responsibility for this shipment was
transferred to you as soon as the carrier accepted the goods at our warehouse. If
concealed damage is discovered after unpacking this shipment, you must submit a
damaged freight claim with the carrier. Carpenter Mfg. Co., Inc. cannot submit your
claim for you. In order for you to collect for concealed damage, the carrier must be
notified with 5 days of the date you receive this shipment. You must leave the damaged
items and packing material as is (i.e. return all merchandise and all packing material to
the shipping container) until the claim has been inspected by the carrier. It is also
important to note that the carrier will not accept a claim if the goods have been moved
from the point of the carriers’ delivery to another street address. If you have any
questions or problems, please give us a call at [phone], or email us at
[email protected].

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Safety Notice
CAUTION
This equipment comes equipped with a LEXAN safety
guard, containing a safety interlock switch. The
machine will not operate unless the guard is in the
closed position.
**IMPORTANT**
Do not attempt to defeat the function or purpose of the
safety interlock switch. Serious injury to the
operator’s eyes, fingers or other body parts may
result from attempts to operate this equipment with
the safety guard in the raised position.

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Machine Contents
Each Carpenter Model 75 Compu-Strip® comes complete with the following:
Quantity
Part Number
Description
1
4905
(60) Piece Guide Bushing Set
1
8019
Power Cord
1
2934
3/32” Hex Wrench
1
1620
5/64” Hex Wrench
PN 4905 (60)
Piece Guide
Bushing Set
PN 8019
Power Cord
PN 1620
5/64” Hex
Wrench
PN 2934
3/32” Hex
Wrench

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Product Description and Specifications
Product Description
The Carpenter Model 75 is a fully programmable wire and coaxial cable stripper. It is
designed to strip a wide range of wire and cables up to a maximum outer diameter
(O.D.) of 0.275” (6.98 mm). Overall strip length is programmable up to 1.500” (38.10
mm). The Model 75 uses exclusive orbiting blade technology. See Section 1 –Theory
of Operation for a better understanding of this unique stripping technology.
The Model 75 is microprocessor-controlled and is fully user programmable. A large
graphical user interface (GUI) consisting of a 240 x 128 LCD graphics panel allows for
easy viewing. An efficiently designed keyboard and a user-friendly programming
interface also highlight the Model 75. Additionally, the Model 75 uses single-screen
programming. All required strip data is entered onto a single LCD screen, simplifying
setup and reducing confusion by eliminating paging through multiple display screens
during setup.
Up to five (5) separate strip steps may be programmed, accommodating both coaxial
and triaxial type cables. All required strip parameters are programmable, including strip
length, pull length, cut diameter, cutter blade step-back, cut dwell time, etc. The unit
can be programmed in inches or millimeters. Up to 999 programs may be stored in the
Model 75’s battery-backed memory. A ten-character name field is provided so that an
operator can name each cable program alpha-numerically.
Specifications
Stripper Type
Orbiting blade (see Section 1 –Theory of
Operation for more information)
Maximum Cable Diameter
0.275” (6.98mm)
Maximum Strip Length
1.50” (38.10mm)
Maximum Pull Length
0” – 1.50” (0mm – 38.10mm)
Stepback
0” – 0.05” (0mm – 1.27mm)
Cut-Dwell
0 –3.0 seconds
Blade Feed Rate
4 speeds, user selectable
Pull Speed
4 speeds, user selectable
Cycle Time
Typical 3-step strip 7 to 10 seconds
Maximum Number of Strip Steps
5
Programming Units
Inches or mm, user selectable
User Program Memory
999 maximum locations, battery backed
Password Protection
User programmable
Cable Naming
Up to 10 alpha-numeric characters
Cable Guide System
Interchangeable aluminum guide bushing
Cable Centering
100% field adjustable cable centering

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Guide Bushing Storage
Built-in storage for up to 10 guide bushings
Safety Guard
Lexan (removable)
Safety Interlock
Electrical interlock on safety guard
Display Type
240 x 128 graphic LCD, CCFL backlight
Keypad Type
Proprietary membrane/mechanical switch with
tactile feedback
Cycle Actuation
Push-button switch (connector for footswitch
also included)
Cooling
Convection
Electrical Requirements
85 –265 VAC, 47 –63 Hz, 3 AMP max
Main Fuse Type
5x20mm, 4.0 AMP type (2 required)
Dimensions
8.5” x 16.2” x 12.0” (W x L x H)
Weight
35 lbs. (15.9 kg.)

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Section 1 –Theory of Operation
Introduction
The Model 75 uses proprietary orbiting blade technology. Prior to the commercial
availability of orbiting blade technology, there were two primary technologies found in
production wire processing equipment: rotary blade technology and V-blade technology.
Also available, though much less prevalent due to the high cost of the technology, is
laser stripping technology.
In order to obtain the maximum application flexibility of the Model 75, a general
understanding of how an orbiting blade stripper works is desirable. This section will
look at the theory behind the exclusive orbiting blade technology.
Orbiting Blade Technology
An orbiting blade wire stripper uses a uniquely designed cutter blade consisting of a
steel or carbide “plate” with a hole sharpened to a knife edge. See Figure 1-1 below.
Figure 1-1: Typical Orbiting Cutter Blade
To cut the layer(s) of a wire or a cable, the wire is inserted through a guide bushing
(used to center and support the cable) directly adjacent to the cutter blade and through
the sharpened hole of the cutter blade. Next, the cutting edge of the blade is orbited
around the wire as it is fed toward the wire to the desired cutting depth. See Figure 1-2
below.
This is accomplished by a unique mechanism that generates the orbiting action while
allowing the radius of the orbit, and hence the diameter to which the blade cuts, to be
completely adjustable.

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Figure 1-2: Path of Orbiting Blade
Since the blade orbits completely around the circumference of the wire, it produces a
clean and consistent cut. And, since the full 360oof the cutting edge is used to sever
the wire, the blade life is typically much greater than that of a rotary type stripper.
A typical rotary type stripper uses one or two blades and, like the orbiting blade stripper,
cuts completely around the circumference of a wire. But the rotary stripper uses only a
single point along the cutting edge of the blade(s) to do 100% of the cutting. Hence,
one key advantage of an orbiting blade stripper over a rotary stripper is greater blade
life.
Another advantage of an orbiting blade stripper over a typical rotary stripper is the
square cut that is produced. The blade of the orbiting cutter is moved at an exact right
angle to the axis of the cable, providing a perfectly square cut. In most rotary machines,
the blades move toward the axis of the wire on an arc, which has the tendency to “point”
the cut shoulder rather than giving a perfectly square cut.
One potential disadvantage of an orbiting blade stripper as compared to a dual-blade
rotary stripper is in the strip slug removal capabilities. The typical dual-blade rotary
stripper has two opposing blades that sever the layer(s) to be removed. After the
layer(s) are cut, the blades are also used to pull the slug off the end of the wire. This is
possible because the two blades “capture” the slug during pull-off. See Figure 1-3
below.
Figure 1-3: Rotary Stripper 2-Point Slug Removal Method

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The orbiting blade stripper has only a portion of the blade engaged with the severed
slug at pull-off time. In most instances, this limited blade engagement is not sufficient to
pull the slug off, since the wire has a tendency to deflect away from the blade edge as
the blade is moved along the wire.
To compensate for this situation, a pair of “gripper blades” are added to grip the severed
slug before pull-off. Additionally, the gripper blades may be used alone for stripping.
There are many types of hookup wire, for example, which may be stripped using just the
gripper blades for both severing the jacket and pulling off the slug. This may improve
production rates on jobs where a precise rotary type cut is not required.
On the Model 75 programmable orbiting blade stripper, the amount that the gripper
blades grip the slug is fully programmable, referred to as the “pull diameter.” Since the
blades that pull the severed slug are independent of the cutter blade, it is not necessary
to program a blade withdraw amount (typically referred to as “stepback” or “wayback”).
Just program the “cut diameter” that the cutter blade should cut to (CUT parameter),
and separately program the diameter the gripper blades should close to remove the
slug (PULL parameter under the diameter data section).
Another characteristic of an orbiting blade stripper that is worth noting is the fact that the
cutter blade cuts in an offset manner. Unlike a dual blade rotary stripper which has two
opposing blades that tend to help capture and cut the cable on center, the orbiting blade
stripper cuts by “pushing” against the cable as the cutting edge is orbiting around it,
using the wire guide bushing to act as the cable stop. The more clearance there is in
the wire guide bushing, the further off the cut axis (cut center) the cable will be pushed.
See Figure 1-4 below.
Figure 1-4: Cut Offset vs. Wire Guide Bushing Fit
In an orbiting blade stripper in which the cut diameter is programmable, the further the
cable is offset from cut center due to excessive bushing clearance, the deeper the blade
cut diameter will need to be programmed in order to achieve the correct cut results.
This may result in programmed cut diameter values that vary considerably from the
diameters actually measured from the cable. Essentially, the cutting depth is required
to compensate for too much clearance in the guide bushing, or other tolerances in the

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cutter mechanism. Aside from the cut diameter programming issues, in most cases this
offset characteristic has a minimal effect on strip quality and repeatability.
It is important to use a wire guide bushing that is correctly sized for the cable being
processed. The optimum wire guide bushing size is typically 0.003” – 0.005” larger than
the average measured cable outer diameter, depending on the cable characteristics. It
is possible to obtain satisfactory stripping results with considerably more clearance than
this, due to the fact the cable is always offset the same amount wherever the blade is in
its orbit. However, the most precise strip results will always be obtained with a correctly
sized wire guide.

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Section 2 –Your New Model 75
2.1 Unpacking and Inspection
Note: Before unpacking the unit, check the box for any damage that may have occurred
during shipping. Any damage claims should be filed directly with the carrier.
1. Carefully open the top of the shipping box.
2. Remove the foam pad from under box top flaps.
3. Remove the 60-piece guide bushing set and the parts bag containing the power
cord and wrenches from the box.
4. Carefully lift the Model 75 and place the unit on a sturdy bench top.
5. Check to be sure that there are no loose screws or other objects inside the
shipping box. If any loose objects are found, please contact the factory.
6. Check the unit to be sure there is no obvious physical damage. Claims for
damage during shipping should be filed directly with the carrier.
7. Install a wire guide bushing as necessary. See 3.3 –Wire Guide Bushing
Installation and Removal.
8. Plug the supplied IEC style power cord into the power entry module on the back
of the unit.
9. It is strongly suggested that the box and packing materials be retained for use if
the unit should have to be returned to the factory for repairs or shipped to
another location.
10.Please read this operator’s manual thoroughly before applying power to the unit.
2.2 Shipping the Unit
If it is necessary to ship the unit to another location, please follow these instructions:
1. Remove debris tray and empty contents. See 3.2 –Debris Tray Installation and
Removal. Wipe tray out with cloth if necessary. This step is very important.
2. Replace debris tray, being sure to tighten the thumb screw securely to prevent it
from vibrating loose during shipping.
3. Remove power cord from back of unit and bundle cord with a twist tie.
4. Remove Wire Guide Bushing. See 3.3 –Wire Guide Bushing Installation and
Removal.
5. Carefully pack the unit into the originally supplied box using the foam pieces
supplied.
6. If the original shipping materials are not available, be sure to pack the unit very
carefully to prevent damage during shipping.
Note: Unit must be at room temperature before applying power. If unit is moved from
one location to another of a different temperature, please allow unit to set for one hour
prior to applying power. Failure to follow these instructions may cause serious damage
and unit failure.

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2.3 Installation
1. Before applying power to the unit, please read this manual thoroughly.
2. Plug the unit into an AC power source of between 85 and 265 VAC, 47 to 63 Hz.
3. Turn the power switch on the power entry module (back of unit) to the ON (1)
position.
4. After a moment, the LCD display will show the Carpenter logo, the software
version, unit serial number and a prompt for the operator to press ENTER.
5. Press the key.
6. The unit will enter “self-calibration mode.”
7. After completion of the self-calibration mode, the unit will enter run mode and the
LCD display will show the currently programmed setup. This is the run screen.
See Figure 2-1 below.
8. To process cables with the currently displayed setup, proceed to 2.4 –Pre-
Processing Checks.
9. To edit the current setup or perform other programming operations, please see
Section 4 –Programming the Model 75.
Figure 2-1: Model 75 "Run Screen"
2.4 Pre-Processing Checks
Before processing cables on the Model 75, the following steps must be performed:
1. Power must be applied to the unit and the unit must be in the run mode.
2. The desired cable strip specifications should be displayed on the LCD screen
when unit is in the run mode. If the cable data displayed is not correct, edit the
data by entering edit mode. See 4.3 –Edit Mode –The Key.

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3. Be sure that the process options settings are correct. See 4.4.1 –Process
Options.
4. The correct size wire guide bushing should be installed in machine. See 3.3 –
Wire Guide Bushing Installation and Removal.
5. The Lexan safety guard should be installed on machine. See 3.1 –Safety Guard
Installation and Removal. Note: The unit will not cycle without the Lexan safety
guard installed.

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Section 3 –Mechanical Setup and Adjustments
3.1 Safety Guard Installation and Removal
The Model 75 has a Lexan safety guard which must be installed before cable
processing can begin. To install the safety guard, refer to Figure 3-1 and the following
steps:
Figure 3-1: Installing the Safety Guard –Rear
1. Insert the rear (wide end) of the safety guard into the slot beneath the Model 75
front panel. Note that the bend in the front (narrow end) of the guard should be
pointing down. See Figure 3-1 above.
2. Insert the front (narrow end) of the safety guard into the slot below the wire clamp
jaws. See Figure 3-2 below.
3. Securely tighten the thumb screw.
4. Reverse the above steps to remove the safety guard.
Insert safety
guard here.

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Figure 3-2: Installing the Safety Guard –Front
3.2 Debris Tray Installation and Removal
The Model 75 contains a removable debris tray. Follow the steps below to install or
remove the tray.
1. The Model 75 debris tray has formed “fingers” on its left end that hook on the
bottom inside left edge of the front carriage cover. See Figure 3-3 below.
Figure 3-3: Debris Tray Retaining Fingers
Insert safety
guard here.
Tighten
thumbscrew.

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2. To install the debris tray, slide the debris tray underneath the cutter assembly
and hook the debris tray retaining fingers on the lower inside left edge of the front
carriage cover assembly. See Figure 3-4 below.
Figure 3-4: Debris Tray Installation
3. Align the slot in the debris tray retaining tab with the tapped hole on the front right
side of the carriage cover and install the 6-32 thumb screw and tighten securely.
See Figure 3-5 below.
4. Reverse steps 2 and 3 to remove the debris tray.

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Figure 3-5: Debris Tray Retaining Tab/Thumb Screw
Note: It is important that the debris tray be emptied regularly to prevent a buildup of
strip debris around the cutter drive plates and front carriage cover, etc. Any damage to
the unit that is determined to be a result of failure to keep the debris tray emptied
is not covered under the machine warranty.
3.3 Wire Guide Bushing Installation and Removal
The Model 75 uses easily interchangeable aluminum guide bushings to center and
support the cable throughout the strip process. This guide bushing is secured in place
by a single thumb screw. See Figure 3-6 below.