Burford 2200 User manual

BURFORD®CORP.
SERVICE MANUAL
FOR YOUR
BURFORD®ELECTRONIC SMART TYER
MODEL 2200/2300
ORIGINAL INSTRUCTIONS
MODEL NUMBER_________
SERIAL NUMBER_________
WIRING DIAGRAM_________ISSUE___
Date: March 7, 2013
COPYRIGHT © 2006 –2013 by BURFORD®CORP.
Manual Part No. C00282 Rev “A”

ii
SAFETY PRECAUTIONS
As Burford®Corp. strives to promote safety in the maintenance and operation of Burford®
equipment, we request that the following safety procedures be followed, along with any
additional safety procedures set by the customer’s in-plant safety officers or local codes.
1. Read the manual completely before attempting installation or operation of this unit.
2. This machine may contain programs that are password protected. Contact your
supervisor or Burford®Corp. for password.
3. Incoming electrical power must be properly shielded, routed, and grounded. All
safety codes should be followed. Study wiring diagrams before attempting
installation.
4. Disconnect power to equipment before removing any guards or covers. Replace
guards or covers before resuming operation of the unit.
5. Loose clothing, jewelry and long hair should be considered a safety hazard around
mechanical equipment. Ensure that they will not be entangled in the equipment.
6. Keep clear of moving machine parts. Bodily harm and/or serious injury may result
from contact with moving gears, sprockets, chains or pneumatically controlled
machine components.
7. Do not bypass safety switches.
8. Do not attempt repairs while equipment is running.
9. Use only original equipment parts designed to safely operate in the equipment.
10.Only authorized personnel should be allowed to operate or perform maintenance on
the unit.
11.This unit is not washdown ready. Do not wash the unit or any of its electrical or
mechanical components, with any form of high pressure or running liquids.

iii
DISCLAIMER
The descriptions and specifications contained in this Service Manual were in effect when
this manual was approved for printing. Our policy is one of continuous improvements, and
we do hereby reserve the right to discontinue models at any time, or to change
specifications, prices, or design without notice and without incurring obligations.
Burford®Corp. expressly disclaims any liability for damages and/or injuries caused as a
result of negligence or misuse of its product. Such negligence or misuse includes, but is not
limited to, software/program alteration, removal of guards, faulty wiring due to improper
installation, subjecting the unit to washdown environments or any physical or mechanical
changes made to a Burford®unit, by anyone other than a qualified Burford®Technician.
Burford®equipment should only be used for the purpose for which it was sold, and should
not be modified in any way without notifying the General Manager of Burford®Corp. in
writing of the modification.
The original language for this document is English. Translations to other languages may
not be accurate.

iv
TABLE OF CONTENTS
SAFETY PRECAUTIONS...............................................................................................ii
DISCLAIMER.................................................................................................................iii
TABLE OF CONTENTS.................................................................................................iv
TABLE OF FIGURES ...................................................................................................vii
TABLE OF FLOW CHARTS........................................................................................viii
1.0 INTRODUCTION.................................................................................................1-1
1.1 General Information .................................................................................................................1-1
1.1.1 Specifications................................................................................................................................. 1-1
1.1.2 Bag thickness requirements........................................................................................................... 1-1
1.1.3 Bag neck length requirements........................................................................................................ 1-2
1.2 Model Numbers........................................................................................................................1-3
2.0 INSTALLATION PROCEDURES........................................................................2-1
2.1 Mechanical Installation.............................................................................................................2-1
2.2 Electrical Interconnections.......................................................................................................2-3
2.2.1 Bagger enable circuit (safety interlock) .......................................................................................... 2-3
2.2.2 Bagger-active circuit....................................................................................................................... 2-3
2.2.3 External counter output .................................................................................................................. 2-4
2.3 Installation Arrangements ........................................................................................................2-4
3.0 OPERATION PROCEDURES.............................................................................3-1
3.1 Theory Of Operation ................................................................................................................3-1
3.2 Package Recognition System..................................................................................................3-2
3.3 Dual Ribbon Spool System......................................................................................................3-2
3.4 Package Detection System (PDS)...........................................................................................3-3
3.5 General Operation....................................................................................................................3-4
3.5.1 Operator controls............................................................................................................................ 3-5
3.5.2 Main enclosure, controls................................................................................................................. 3-6
3.5.2.1 Main power disconnect ..................................................................................................... 3-6
3.5.2.2 Audible alarm.................................................................................................................... 3-6
3.5.3 Changing and threading the ribbon................................................................................................ 3-7
3.6 Settings And Adjustments........................................................................................................3-8
3.6.1 Timing............................................................................................................................................. 3-8
3.6.2 Lubrication...................................................................................................................................... 3-8
3.6.3 Proximity sensor adjustment .......................................................................................................... 3-8
3.6.4 Gathering belts tension adjustment................................................................................................ 3-9
3.6.4.1 Upper belt adjustment....................................................................................................... 3-9
3.6.4.2 Lower belt adjustment..................................................................................................... 3-10
3.6.5 Gathering brush adjustment......................................................................................................... 3-11
3.6.5.1 Gathering brush tension adjustment............................................................................... 3-11
3.6.5.2 Gathering brush mounting angle adjustment .................................................................. 3-11
3.6.6 Gathering belts speed adjustment................................................................................................ 3-12
3.6.7 Ribbon dispenser adjustment....................................................................................................... 3-13
3.6.8 Spacing of twister hook shaft to tip of holder/shear...................................................................... 3-15
3.6.9 Holder/shear adjustment .............................................................................................................. 3-16
3.6.10 Adjusting the tie tightness............................................................................................................. 3-19
3.6.10.1 Factory setting ................................................................................................................ 3-20
3.6.10.2 Adjusting the eccentric ribbon guide ............................................................................... 3-20
3.6.10.3 Adjusting the belt pulley.................................................................................................. 3-20
3.6.11 Adjusting the bag switch............................................................................................................... 3-21
3.7 Electrical.................................................................................................................................3-22
3.7.1 Circuit board descriptions............................................................................................................. 3-22
3.7.1.1 CPU board, part number C01410 ................................................................................... 3-22
3.7.1.2 Amplifier board part number 611464............................................................................... 3-22
3.8 Relay Descriptions .................................................................................................................3-23
3.8.1 Panel relays main enclosure ........................................................................................................ 3-23
3.8.2 Amplifier board relays................................................................................................................... 3-23

v
3.9 DIP Switch Settings................................................................................................................3-24
3.9.1 Amplifier board part number 611464............................................................................................ 3-24
3.9.2 CPU board part number C01410.................................................................................................. 3-25
3.10 Counter Output.......................................................................................................................3-26
3.11 PROM Replacement Procedure ............................................................................................3-26
3.12 Speed Following Feature.......................................................................................................3-28
3.13 Communicating With The Controller......................................................................................3-29
3.13.1 General......................................................................................................................................... 3-29
3.13.2 Communications programs........................................................................................................... 3-29
3.13.2.1 Burford®TERMINAL program......................................................................................... 3-30
3.13.2.2 Terminal program in Microsoft Windows version 3.0 or 3.1 ............................................ 3-31
3.13.2.3 Configuring the Microsoft Windows terminal program..................................................... 3-32
3.13.3 Cable between PC and tyer head................................................................................................. 3-33
3.13.4 Safety considerations................................................................................................................... 3-34
3.13.5 Tyer commands............................................................................................................................ 3-35
3.13.5.1 When you start the tyer................................................................................................... 3-35
3.13.5.2 TIME and DATE commands ........................................................................................... 3-36
3.13.5.3 TROUBLE command ...................................................................................................... 3-37
3.13.5.4 QUERY command .......................................................................................................... 3-38
3.13.5.5 RESET command........................................................................................................... 3-40
3.13.5.6 DEBUG command .......................................................................................................... 3-40
3.13.5.7 HOME command ............................................................................................................ 3-41
3.13.5.8 DISPENSE command..................................................................................................... 3-41
3.13.5.9 + command..................................................................................................................... 3-43
3.13.6 Capturing data into a text file on the PC....................................................................................... 3-43
3.13.6.1 With the Burford®TERMINAL program........................................................................... 3-43
3.13.6.2 With Windows TERMINAL program................................................................................ 3-44
3.13.6.3 After the files have been captured .................................................................................. 3-44
3.14 Pass Thru Shelf......................................................................................................................3-45
4.0 TROUBLESHOOTING........................................................................................4-1
4.1 Diagnostic LED's......................................................................................................................4-1
4.2 Seven Segment LED Error Codes...........................................................................................4-4
4.3 Audible Alarm Codes ...............................................................................................................4-6
4.4 Terminal Option........................................................................................................................4-6
4.5 Troubleshooting Flow Charts...................................................................................................4-6
4.6 Test Procedures.....................................................................................................................4-37
4.6.1 Test procedure for motor encoders.............................................................................................. 4-37
4.6.2 Test procedure for motor continuity.............................................................................................. 4-38
4.6.3 Test procedure for servo motor fuses........................................................................................... 4-39
4.6.4 Test procedure for checking the proximity switch LED’s .............................................................. 4-40
4.6.5 Test procedure for the BCD switch............................................................................................... 4-41
4.6.6 Test procedure for the bag switch ................................................................................................ 4-42
4.6.7 Test procedure for enclosure/head compatibility.......................................................................... 4-43
4.7 Mechanical Troubleshooting..................................................................................................4-44
5.0 MAINTENANCE..................................................................................................5-1
5.1 Preventive Maintenance...........................................................................................................5-1
5.1.1 Daily ............................................................................................................................................... 5-1
5.1.2 Weekly............................................................................................................................................ 5-1
5.1.3 Monthly........................................................................................................................................... 5-1
5.1.4 Semi-Annual................................................................................................................................... 5-1
6.0 RECOMMENDED SPARE PARTS LIST............................................................6-1
7.0 ASSEMBLY DRAWINGS AND PARTS LISTS ..................................................7-1
7.1 Frame Components (210606-01 “C”).......................................................................................7-1
7.2 Bearing And Shaft Assembly (210606-02 “B”).........................................................................7-4
7.3 Front Lower Plate Assembly (210606-03 “F”)..........................................................................7-6
7.4 Front Upper Plate Assembly (210606-04 “C”) .........................................................................7-9
7.5 Drive Components (210606-05 “C”).......................................................................................7-13
7.6 Electrical Components (210606-06 “D”) ................................................................................7-16

vi
7.7 Infeed Belt Components (210628 “G”) ...................................................................................7-21
7.8 Needle Assembly (210613 “B”) ..............................................................................................7-23
7.9 Ribbon Frame Assembly (210630-XXX “05”) ........................................................................7-25
7.10 Dual Ribbon Pivot Assembly (210626-XXX “05”) ..................................................................7-27
7.11Single Ribbon Tension Assembly (210629-XXX “04”)...........................................................7-29
7.12 Brush Drive Assembly Components (210631-002 “C”) .........................................................7-32
7.13 Brush Drive Assembly (210458-002 “L”)................................................................................7-34
7.14 Stand Assembly (210633-XXX “02”)......................................................................................7-37
7.15 Display Assembly (210186 “J”) ..............................................................................................7-40
7.16 Wiring Diagram (ED0652 “D”) ................................................................................................7-42

vii
TABLE OF FIGURES
Fig. 1-1 Bag Neck Lengths................................................................................................ 1-2
Fig. 1-2 Model Numbers.................................................................................................... 1-3
Fig. 2-1 Tyer Mounting Bracket......................................................................................... 2-1
Fig. 3-1 Dual Ribbon Spool System.................................................................................. 3-2
Fig. 3-2 Product Sensor And Adjustments ........................................................................ 3-3
Fig. 3-3 Model 2200/2300 ................................................................................................. 3-4
Fig. 3-4 Operator Controls................................................................................................. 3-5
Fig. 3-5 Changing And Threading Ribbon......................................................................... 3-7
Fig. 3-6 Upper Belt Adjustment......................................................................................... 3-9
Fig. 3-7 Upper Idler Pulley................................................................................................. 3-9
Fig. 3-8 Lower Belt Adjustment....................................................................................... 3-10
Fig. 3-9 Lower Idler Pulley............................................................................................... 3-10
Fig. 3-10 Gathering Brush Adjustment............................................................................ 3-11
Fig. 3-11 Ribbon Dispenser Adjustment.......................................................................... 3-13
Fig. 3-12 Dancer Arm Positioning ................................................................................... 3-13
Fig. 3-13 Setting Brake Tension...................................................................................... 3-14
Fig. 3-14 Ribbon Drop Sensor......................................................................................... 3-14
Fig. 3-15 Twister Hook Shaft........................................................................................... 3-15
Fig. 3-16 Holder/Shear Adjustment................................................................................. 3-16
Fig. 3-17 Bag Tail Tunnel Bracket................................................................................... 3-16
Fig. 3-18 Tunnel Plate..................................................................................................... 3-17
Fig. 3-19 Holder/Shear Cam ........................................................................................... 3-17
Fig. 3-20 Shuttle Bar Bolts .............................................................................................. 3-18
Fig. 3-21 Tie Tightness.................................................................................................... 3-19
Fig. 3-22 Eccentric Ribbon Guide ................................................................................... 3-20
Fig. 3-23 Belt Pulley Adjustment ..................................................................................... 3-20
Fig. 3-24 Bag Switch Adjustment.................................................................................... 3-21
Fig. 3-25 Bag Switch Stop............................................................................................... 3-21
Fig. 3-26 AMP Board DIP Switches ................................................................................ 3-24
Fig. 3-27 CPU Board DIP Switches................................................................................. 3-25
Fig. 3-28 PROM Replacement........................................................................................ 3-27
Fig. 3-29 Serial Port And Cable....................................................................................... 3-33
Fig. 3-30 Pass Thru Shelf................................................................................................ 3-45
Fig. 4-1 Motor Encoder Test............................................................................................ 4-37
Fig. 4-2 Motor Connector Location.................................................................................. 4-38
Fig. 4-3 Motor Resistance............................................................................................... 4-38
Fig. 4-4 Servo Motor Fuses Test..................................................................................... 4-39
Fig. 4-5 Prox Switch LED Test ........................................................................................ 4-40
Fig. 4-6 BCD Switch Test................................................................................................ 4-41
Fig. 4-7 Bag Switch Test................................................................................................. 4-42
Fig. 4-8 Interlock Switch Jumper..................................................................................... 4-43

viii
TABLE OF FLOW CHARTS
Flow Chart 4-1 Tyer Will Not Power Up.............................................................................4-7
Flow Chart 4-2 Tyer Will Not Power Up, cont'd................................................................. 4-8
Flow Chart 4-3 Gathering Belts Won't Run ....................................................................... 4-9
Flow Chart 4-4 Gathering Brushes Won't Run ................................................................ 4-10
Flow Chart 4-5 Tyer Won't Allow Bagger To Start........................................................... 4-11
Flow Chart 4-6 Error Code: E001.................................................................................... 4-12
Flow Chart 4-7 Error Code: E101.................................................................................... 4-13
Flow Chart 4-8 Error Code: E102.................................................................................... 4-14
Flow Chart 4-9 Error Code: E111.................................................................................... 4-15
Flow Chart 4-10 Error Code: E112 or E113 .................................................................... 4-16
Flow Chart 4-11 Error Code: E114.................................................................................. 4-17
Flow Chart 4-12 Error Code: E115 and E116.................................................................. 4-18
Flow Chart 4-13 Error Code: E115 and E116, cont'd...................................................... 4-19
Flow Chart 4-14 Error Code: E117.................................................................................. 4-20
Flow Chart 4-15 Error Code: E121.................................................................................. 4-21
Flow Chart 4-16 Error Code: E122 or E123 .................................................................... 4-22
Flow Chart 4-17 Error Code: E124.................................................................................. 4-23
Flow Chart 4-18 Error Code: E125 and E126.................................................................. 4-24
Flow Chart 4-19 Error Code: E125 and E126, cont'd...................................................... 4-25
Flow Chart 4-20 Error Code: E127.................................................................................. 4-26
Flow Chart 4-21 Error Code: E131.................................................................................. 4-27
Flow Chart 4-22 Error Code: E132 or E133 .................................................................... 4-28
Flow Chart 4-23 Error Code: E134.................................................................................. 4-29
Flow Chart 4-24 Error Code: E135 and E136.................................................................. 4-30
Flow Chart 4-25 Error Code: E135 and E136, cont'd...................................................... 4-31
Flow Chart 4-26 Error Code: E137.................................................................................. 4-32
Flow Chart 4-27 Error Code: E146.................................................................................. 4-33
Flow Chart 4-28 Error Code: E146, cont'd....................................................................... 4-34
Flow Chart 4-29 Error Code: E151 through E169 ........................................................... 4-35
Flow Chart 4-30 Error Code: E300.................................................................................. 4-36

1-1
1.0 INTRODUCTION
1.1 General Information
The Burford®2200 Series Electronic Smart Tyer is designed to close plastic bags
with twist tie ribbon in a wide variety of automatic packaging applications. The
tyer uses a microprocessor to control and coordinate the motion of four servo
motors, which perform the twist tying function. This machine is normally installed
onto a bagger or conveyor and interfaced into the existing control system to
create a complete package closing system.
1.1.1 Specifications
Depending on conveyor speed and flight spacing, the Smart Tyer is capable of
operating speeds 100 plus packages per minute. The Smart Tyer operates on a
nominal 110 Volts, 60 Hz, single-phase alternating current. 15 amp service is
recommended. Smart Tyer connections for bagger interlock and safety circuits are
provided standard. A counter signal is provided which can be used in conjunction
with an external counter (not provided).
On flighted conveyors, any flight spacing may be used, but the tyer can have a
higher production rate (packages per minute) with a small flight spacing, such as
nine inches. This tyer can also be used on belted conveyors that provide consistent
spacing. All referenced measurements are in inches except as noted.
1.1.2 Bag thickness requirements
For optimal performance, a minimum bag thickness of 1.25 mil is recommended.
Note: Minimum size for a service transformer shall be 1.5KVA.

1-2
1.0 INTRODUCTION, cont’d.
1.1 General Information, cont’d.
1.1.3 Bag neck length requirements
1. Measure the diagonal across the end of the product.
2. Take one-half of this diagonal measurement and (depending upon the
machine combination) add three or four inches to determine the required
length of the bag neck.
This formula is provided in case you are developing a new product package and
need to calculate a bag neck length for an automatic tying operation. Please consult
a reliable package manufacturer for your specific needs or contact Burford®Corp. if
we can be of assistance.
CAUTION: Short bag neck lengths can cause excessive ribbon drops and
package jams.
Fig. 1-1 Bag Neck Lengths

1-3
1.0 INTRODUCTION, cont’d.
1.2 Model Numbers
MODEL 2200 (Right Hand) - mounts on right side of conveyor.
MODEL 2300 (Left Hand) - mounts on left side of conveyor.
PRODUCT FLOW
PRODUCT FLOW
RIGHT HAND
MODEL 2000
LEFT HAND
MODEL 2100
RIGHT HAND
MODEL 2200
LEFT HAND
MODEL 2300
Note: Referenced as looking with the direction of conveyor flow.
Fig. 1-2 Model Numbers

2-1
2.0 INSTALLATION PROCEDURES
These instructions are for a typical bagger. If your specific installation requirements
are different from what is described here. See Section 2.3 on how to contact
Burford®Corp. for assistance.
2.1 Mechanical Installation
1. Locate the template drawing provided with your manual and review your
application. Note that the template drawing is intended for use with
standard bread packages. Depending upon your application, it may be
necessary to raise or lower the mounting holes. Layout the bolt pattern as
described on the drawing.
2. Center punch the hole locations indicated. Drill 3/8" diameter mounting
holes required for the standard unit (clearance holes for 5/16" bolts).
3. Position the Tyer Mounting Bracket (shown with dual ribbon system
removed) and bolt this assembly onto the conveyor with 5/16" bolts and
nylon insert nuts provided. Square bracket with conveyor and tighten
securely.
Mounting Holes
Fig. 2-1 Tyer Mounting Bracket

2-2
2.0 INSTALLATION PROCEDURES, cont’d.
2.1 Mechanical Installation, cont’d.
4. Remove the Tyer from the shipping crate and slide the unit onto the Tyer
Mounting Bracket. Secure the tyer head using the clamps on the bracket.
The centerline of the gathering belts should align with the center of the
package. For instance, the belts should be 2 inches above the conveyor
for a 4-inch tall package. If necessary, raise or lower the bracket to give
the proper height.
5. Remove the brush assembly from the shipping crate and slide it onto the
Tyer Mounting Bracket. See section 3.6.5 for proper adjustment.
6. For AMF/UBE bread bagger applications, position the product shelf plate
inside the scoop channel. Line up the inlet plate slot with the two (2) studs
on the side of the bagger conveyor. Secure with the flat washers and nuts
provided.
7. Position the main electrical enclosure within six feet of the Tyer Head.
Locate the four (4) pin power cable connector and thirty (30) pin main
control cable connector attached to the main enclosure and connect it to
the mating bulkhead connectors on the back of the Tyer. Locate the
nineteen (19) pin operator control box connector (if equipped) attached to
the main enclosure and connect it to the mating bulkhead connector on
the back of the tyer. These connectors are polarized so that they cannot
be plugged into the wrong receptacles. Locate the Brush Motor power
twist-lock connector attached to the main enclosure and connect it to the
mating connector attached to the Brush Motor.
Note: Heel tab on Mark 50 baggers MUST be mounted on the operator
side of the inlet plate to avoid bag damage.

2-3
2.0 INSTALLATION PROCEDURES, cont’d.
2.2 Electrical Interconnections
To make specific wiring connections to your bagger or conveyor system please
refer to the wiring diagram provided with this manual. The Model 2200 Electronic
Smart Tyer is nominally a 110 VAC machine. If required, minimum service
transformer size shall be 1.5KVA. A flexible conduit is provided to route Line,
Neutral, and Ground into the main enclosure. Included in this conduit are
conductors for other bagger connections. The following is a description of the
other possible connections.
2.2.1 Bagger enable circuit (safety interlock)
The Tyer provides a set of dry contacts that close when the Tyer is ready to tie
packages. The Bagger Enable relay (CR2) is mounted in the Tyer's electrical
enclosure. The contacts can be accessed using wires 58 and 59 in the flexible
conduit. These contacts will open if a fault occurs in the Tyer or if a Tyer safety
circuit is opened. These contacts should be wired in series with the bagger safety
circuit to prevent the bagger from running if the Tyer is not threaded, the ribbon
supply has been depleted, or the Tyer is not turned on.
2.2.2 Bagger-active circuit
This signal from the bagger to the tyer indicates the status of the bagger and it must
be a 110 VAC type. This signal can be taken from across the coil of the clutch relay
of most baggers. This signal drives the coil of a mechanical relay (CR1), which starts
and stops the brush motor and gathering belts of the Tyer. This connection is used
to prevent the Tyer's gathering belts and brushes from running while the bagger is
stopped. This will prevent a package from being pulled forward over a conveyor
flight. This will also reduce wear on the brushes and conserve energy during long
breaks or periods of maintenance in other areas. This connection can be made
using wires 40 and 43 in the flexible conduit coming from the main enclosure. Wire
40 should be connected to the Line side of the coil and wire 43 should be connected
to the Neutral side of the coil. For setup and testing, the gathering belts and brushes
can be made to run while the bagger is inactive by placing the switch on the front of
the operator panel marked BELT/BRUSHES in the ON position.
Note: Wires 40 & 43 should be wired into the bagger so anytime the
bagger is “CYCLING”, 110 VAC is supplied to these wires.

2-4
2.0 INSTALLATION PROCEDURES, cont’d.
2.2 Electrical Interconnections, cont’d.
2.2.3 External counter output
If an external counter is desired, a set of dry contacts are supplied as an input to the
customer's counter. The External Counter relay (CR3) is mounted in the Tyer’s
electrical enclosure. Connection can be made using wires 41 and 42 in the flexible
conduit coming from the main enclosure. The contacts actuate for a period of about
1/4 second immediately after a successful tie has been completed. These contacts
will not actuate if the tyer aborts its tie cycle or if the tyer determines that extra
material is in the bag neck, such as a heel. The contacts can be configured to be
normally open or normally closed by using DIP Switch 2 on the AMP board (see
Section 3.10).
2.3 Installation Arrangements
A Burford®factory trained Installation Engineer may be hired for any installation.
The arrangement can be made with the Service Manager:
Burford®Corp.
Maysville, Oklahoma
Phone: 1-877-BURFORD®or 405-867-4467
Fax: [phone]

3-1
3.0 OPERATION PROCEDURES
3.1 Theory Of Operation
Before discussing the specifics of the Burford®Model 2200 Electronic Smart
Tyer, the overall operation of the tyer will be described to illustrate the principles
of the tying cycle. The Model 2200 is designed to gather and securely close the
neck of a plastic bag by twist tying it with a piece of reinforced ribbon.
The plastic bag first encounters a set of gathering brushes that flatten and
straighten the bag neck. The brushes gently pull the bag neck and product
against the inlet guide and main plate of the tyer. As the bag neck exits the
brushes it is directed towards the gathering belts of the tyer. The gathering belts,
which move at a selectable continuous rate of speed, transport the bag neck
towards the tying position. As it approaches the tying position, the bag neck
actuates the bag switch, which readies the electronics for the start of the tie
cycle. When the bag neck releases the bag switch, the Model 2200 controller
waits for a short time before commencing the tie cycle. This delay allows the bag
neck to gather against the ribbon for a more secure tie. Then the needle begins
to move downward and allows the spring-loaded bag stop to engage, thereby
restraining the end of the bag neck. The needle continues to rotate and wraps
the ribbon around the neck of the bag. As the needle nears its full stroke, the
twister hook begins rotating. The twister hook catches the end of the ribbon held
in the holder/shear, and the part of the ribbon that is wrapped around the bag
neck by the needle. As the hook twists the ribbon together, the holder/shear
transfers to cut and hold the part of the ribbon held by the needle, and
simultaneously releases the end of the twist tie. The twister hook completes its
selectable four or five rotations while the needle returns to the home position,
releasing the bag stop. After the twister hook has tightly secured the neck of the
bag, it reverses rotation for one revolution to discharge the tie from the throat of
the hook. The tied package is then carried away by the conveyor.

3-2
3.0 OPERATION PROCEDURES, cont’d.
3.2 Package Recognition System
The Package Recognition System is an integral part of the Ribbon Tension
assembly and the electronics. This system determines whether a bag neck has
been properly presented in tying position. As the needle wraps the ribbon around
the bag neck, the length of dispensed ribbon is measured. If the amount of ribbon
dispensed is significantly less than that required by a normal package, the
processor aborts the current tie cycle before the twister hook and holder/shear
begin their motion. An audible alarm is sounded to alert the operator of a
possible problem. This system detects inadvertent bag switch actuation caused
by improperly packaged product or trash. By not allowing the holder/shear and
twister to move, possible ribbon drops and jam-ups are avoided. If the length of
dispensed ribbon is significantly more than normal, the tyer completes its tie, but
the alarm is sounded to indicate that a heel may be contained in the tie. These
features (heel detection and package recognition) can be disabled with DIP
SWITCHES 4 and 6 on the AMP board (see section 3.9.1).
3.3 Dual Ribbon Spool System
As the ribbon pulls the dancer arm forward, a spring-loaded brake release arm is
engaged, causing the ”V” belt to be pushed up and away from the pulley,
releasing the brake. The system provides an identical setup, which may be
utilized by releasing the locking pin and rotating the assembly 180 degrees. This
allows the next spool of ribbon to be staged for quick and effective ribbon
changes.
Ribbon Tension
Spring
Reserve
Spool
Locking pin
Package
Recognition System
Sensor
Package Detection
System Sensor
Dancer Arm
Fig. 3-1 Dual Ribbon Spool System

3-3
3.0 OPERATION PROCEDURES, cont’d.
3.4 Package Detection System (PDS)
The Package Detection System monitors packages as they pass the Burford®
Model 2200 / 2300 Servo Tyer and stops the bagger if a twist-tie is not applied.
The system automatically resets after the next accepted package.
The PDS operates by monitoring the package sensor to determine when a
package is in the operating area of the Servo-Tyer. Once a package is present,
the system waits for the Servo-Tyer to actuate its counter contacts. If the Servo-
Tyer has not counted the package as good before a preset time period has
expired, the PDS will open the bagger safety circuit, stopping the bagger.
This feature can be disabled with DIP SWITCH 7 on the CPU board (see Section
3.9.2).
The Package Sensor is an advanced retro-reflective photo-proximity type. The
sensor is factory preset to accommodate a large range of bag types and
conveyor surfaces. However, for optimal operation, it is likely that some user
adjustment may be required. Verify that the sensor does not detect the conveyor
flights and does detect both the longest and shortest package that is run on the
line.
If adjustments to the package sensor are required, turn the sensor gain and light
/ dark detect potentiometers until satisfactory operation is obtained. The sensor
bracket may also be bent to extend or decrease the detection distance across
the conveyor. Please note that bending the bracket will often require the
sensitivity of the package sensor to be readjusted for optimal operation. See
Figure 3-2 for the location of the adjustment potentiometers and operate LED.
Light / Dark
Detect
Sensor Gain
Operate LED
Fig. 3-2 Product Sensor And Adjustments

3-4
3.0 OPERATION PROCEDURES, cont’d.
3.5 General Operation
The following is a discussion of the overall operation of the Model 2200/2300
Electronic Smart Tyer. The Smart Tyer is designed so the operator has easy
access to controls and adjustments from the front of the machine. The majority of
the controls reside on the front of the operator control panel. The threading
procedure has been simplified which reduces the time needed to change a
ribbon spool.
An example of a normal start up procedure would be for the operator to first
make sure the Tyer's main disconnect is turned on, and then insure the “STOP”
button is in the “out” position. This will supply power to the Tyer's electronics, but
does not supply power to the servo motors. Next, the operator must push the
“START” button on the operator control panel. This will supply power to the servo
motors and start the homing sequence. When the homing sequence is
successfully completed, the Tyer is in the “RUN” mode. The operator should
check the belt speed setting to ensure that it is correct for the current conveyor
speed. If the ribbon is not threaded the operator should follow the procedure to
thread the Tyer. The Tyer is now ready to automatically tie packages.
Ribbon Spool
Dancer Arm
Operator Panel
Ribbon Tension
Spring
Ribbon Routing
Decal
Ribbon
Package
Recognition Sensor
Needle
Upper Gathering
Belt Adjustment
Pulley
Upper Gathering
Belt
Ribbon Guide
Belt Guide
Holder Shear
Twister Hook
Twister Hook
Housing
Lower Gathering
Belt Adjustment
Pulley
Lower Gathering
Belt
Bag Switch
Fig. 3-3 Model 2200/2300

3-5
3.0 OPERATION PROCEDURES, cont’d.
3.5 General Operation, cont’d.
3.5.1 Operator controls
Item
Description
“STOP” Pushbutton
This button is used to disable the Tyer during operation. The “TYER FAULT” light will turn on and the
“MOTORS ENABLED” light will turn off. If the “STOP” button is pushed or the front access cover is
opened, servo motor power will be turned off. Power is removed from the servo motors until the
“START” button is pushed. Pushing the “STOP” button should not turn off the “INITIALIZED” light.
“START” Pushbutton
The first time this button is pushed after power up, the homing sequence is initiated. This sequence
locates the position of each axis relative to its home proximity sensor. Once the homing sequence is
successfully completed, the “INITIALIZED” light should turn on and the belts may start running. If the
brushes are turning and the belt speed is set to anything other than zero, the belts should run. Any
other time the “RUN” button is pushed power will be applied to the servo motors without going
through the homing sequence. The Tyer is now in the “RUN” mode.
“THREAD” Pushbutton
This button has two functions. The main function is to complete the threading procedure after being
pushed and quickly released, which is described in Section 3.5.3. The second function is to force the
Tyer to re-initiate the homing sequence. If for any reason, a previous homing sequence did not prove
satisfactory, the Tyer can be re-homed by holding the “THREAD” button in for three seconds. For this
button to function the Tyer must be in the “RUN” mode with the “MOTORS ENABLED” and
“INITIALIZED” lights on.
“BELTS/BRUSHES,
ON-AUTO-AUTO/PDS”
Selector Switch
This is a three position maintained selector switch. During normal operation, it should be in the
“AUTO” position. If the interlock signal from the bagger is connected properly, the brushes and belts
will only run when the bagger is active. To override this interlock signal and run the brushes and belts
continuously, move the switch to the “ON” position. To activate the Package Detection System move
the switch to the “AUTO/PDS” position.
“MOTORS ENABLED”
Light
This light indicates when the servo motors have power. It should turn on when the “RUN” button is
pushed and stays on until the “STOP” button is pushed or the front cover is opened.
“INITIALIZED” Light
This light will be off when the Tyer is first powered up. It will turn on and stay on when homing
sequence has been successfully completed. This light must be on before the Tyer can be threaded.
“TYER FAULT” Light
This light will indicate problems with the Tyer. During normal operation, the light should be “OFF”.
The light will turn “ON”:
If the Tyer drops of out “RUN” mode. For example, if the “STOP” button is pushed or the
front cover is opened.
If a ribbon drop is detected. However, the tyer will stay in “RUN” mode when this fault is
detected.
The “TYER FAULT” light will toggle “ON” and “OFF when the audible alarm is beeping. This
is intended to help the operator identify which machine is sounding the alarm.
“BELT SPEED”
Pushwheel Switch
In normal operation, this switch enables the operator to adjust the speed of the gathering belts. The
belt speed can be adjusted from a setting of zero to fifteen. In normal operation, each speed setting
is approx. 15 percent faster than the previous setting. Proper speed should pull the package 1”-2”
ahead of the flight and finish tying as the flight catches up.
If the tyer is setup so that the belt speed automatically adjusts to compensate for conveyor speed
changes (see Section 3.12), this switch provides a fine adjustment for conveyor speed.
Fig. 3-4 Operator Controls