Clinton 8890BH Manual de usuario

ML8890BH-7

CLINTON

MODEL 8890BH

PROGRAMMABLE CONTROLLER

DRIVE SYSTEM

FOR

DURKOPP 558

BUTTONHOLE MACHINE

SERVICE MANUAL

Para Español vea el reverso del libro

40-0240-01

SECTION I - DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

SECTION II - INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

DRIVE PULLEY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SYNCHRONIZER & SENSOR . . . . . . . . . . . . . . . . . . . . . . . . . .

SEWING HEAD DRIVE PULLEY . . . . . . . . . . . . . . . . . . . . . . . .

START SWITCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

AIR CYLINDER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

UPPER MOTOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

EMERGENCY STOP SWITCH . . . . . . . . . . . . . . . . . . . . . . . . .

2-1

2-2

2-3

2-4

2-5

SECTION III - ADJUSTMENTS INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

HOME POSITION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

FIRST STITCH POSITION . . . . . . . . . . . . . . . . . . . . . . . . . . . .

NEEDLE UP POSITION . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

MOTOR FUNCTION & SENSOR TEST . . . . . . . . . . . . . . . . . .

TENSION RELEASE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SWING KNIFE & LOOPER THREAD TRAPPER . . . . . . . . . . . .

THREAD NIPPER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-1

3-2

3-3

SECTION IV - MODES OF OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

FULL CYCLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SINGLE STEP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

MOVE TABLE ONLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

REPAIR CYCLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-1

4-2

SECTION V - PROGRAMMING MODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

HOW TO PROGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ACCESS TO HIDDEN PARAMETERS . . . . . . . . . . . . . . . . . . .

MASTER RESET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

EXPLANATION OF PARAMETERS . . . . . . . . . . . . . . . . . . . . .

5-1

5-2

PARAMETERS WITH DIRECT ACCESS . . . . . . . . . . . . .

TIMERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

COUNTERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TOGGLE SWITCHES . . . . . . . . . . . . . . . . . . . . . . . . . . . .

HIDDEN PARAMETERS . . . . . . . . . . . . . . . . . . . . . . . . . .

5-2

5-3

5-4

E. PARAMETER LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6

SECTION VI - TEST MODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

BUILT-IN TEST PROGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . .

TESTING THE HOME AND SEW SENSORS . . . . . . . . . . . . .

TESTING THE CLAMP DOWN AND START SWITCHES . . . .

TESTING THE MOTORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

EXITING THE TEST MODE . . . . . . . . . . . . . . . . . . . . . . . . . . .

DESCRIPTION OF THE HOME AND SEW SENSOR BLOCKS

USING THE EMERGENCY STOP BUTTON . . . . . . . . . . . . . .

AIR PRESSURE SWITCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6-1

6-2

6-3

ML8890BH-8

TABLE OF CONTENTS

ML8890BH-9B

SECTION I

DESCRIPTION

The Clinton Model 8890BH is a Micro Computer Controlled Electro / Mechanized / Pneumatic

system designed to enhance the performance and drastically reduce the maintenance required

to operate a Durkopp Buttonhole machine.

Two DC Servo Motors are used to replace the complete mechanized stop motion components

including the clutch, brake, spur gears and shafts.

State of the art sensors are used to communicate position and speed data to the single micro

computer control system. By use of the LCD Programmable Display, both the machine speed

and buttonhole "Eye" speed can be precisely entered and controlled. The LCD can also be used

to command repair cycles or 3 step cycles to assist in machine maintenance.

Figure 1-1 shows the major components of the system.

FIG. 1-1

1-1

UPPER MOTOR

NEEDLE-UP-

SENSOR

ASSEMBLY

LCDDISPLAY

STOP

SWITCH

START

SWITCH

LCD POST

ASSEMBLY

FIG. 2-2

02-4007-01

COLLAR

10-1457-01

PULLEY ASS'Y

EXISTING

CRANK

FIG. 2-1

ML8890BH-10

2-1

SECTION II

INSTALLATION

Insure that the machine is in working order.

Mark the home position.

A. To install the drive pulley assembly. Remove the manual crank mechanism by rotating the crank

in the clockwise direction (See Fig. 2-1). Remove the pulley carrier assembly by loosening the hex

nut which attaches it to the reversing lever (Fig. 2-1, Item 1) and sliding the entire assembly off the

end of the cross shaft. Remove the large hex nut which holds the manual crank onto the crank hub

(Fig. 2-1, Item 2). Remove all parts from the crank hub. Loosen hex head screw (Fig. 2-1, Item 3)

and slide it toward the operator as far as it will travel in it’s adjusting slot. Place collar (02-4007-01)

and pulley assembly (10-1457-01) on the end of the cross shaft (See Fig. 2-2).

NOTE: The pulley assembly contains a locking bearing, insure that the bearing locks and drives

the shaft in the counterclockwise direction and free-wheels in the clockwise direction. Replace

the crank hub, spring holding device, manual crank and retaining nut (Fig. 2-2).

ROTATE

CLOCKWISE

TO REMOVE

B. To install the synchronizer and sensor assemblies. Remove cover assemblies (Fig. 2-3).

Remove the hand wheel and sewing head pulley by removing the two locking nuts (Fig. 2-4,

Item 1). Remove the stop motion eccentric (Fig. 2-4, Item 2) by removing the threaded stud

(Fig. 2-4, Item 3). Retain thehand wheel, washer and locking nuts so that they may be put back

on at a later time. Remove the stop motion roller assembly (Fig. 2-5, Item 1) by loosening the two

clamp screws (Fig. 2-5 , Item 2). Manually rotate the machine to it’s furthest foreword point (half

way around the eye). Remove the stop motion leaf spring assembly (Fig. 2-5, Item 3) and three

forks lever by loosening the clamp screw (Fig. 2-6, Item 2) and sliding the leaf spring shaft out of

the casting. Remove torsion spring assembly (Fig. 2-6, Item 1). Remove the length adjusting slide,

stop and gauge plate (Fig. 2-7, Items 1, 2, & 3). Remove the tension release block (Fig. 2-7,

Item 4)from the length adjusting slide and attach it to the first stitch sensor block (Fig. 2-8,

10-1458-01). Replace the length adjusting slide with the first stitch sensor block. Using the screw

provided install the home position sensor block (Fig. 2-8, 02-4008-01) and stop bracket (Fig. 2-8,

02-4015-01). Using the screws provided install the sensor block assembly (Fig. 2-8).

WARNING: Insure that there is at least 1/16th of an inch clearance between bottom of

thehome and sew sensors and the home position and first stitch blocks

(Fig. 2-9) so that no damage is caused to the sensors when the machine is

cycled.

FIG. 2-3

FIG. 2-4 1

RETAIN FOR

REINSTALLATION

ML8890BH-11A

2-2

FIG. 2-7 FIG. 2-8

FIG. 2-5 FIG. 2-6

C. To install the sewing head drive pulley assembly. Attach the magnet disk holder to the sewing

head pulley (Fig. 2-8). Slide the pulley onto the arm shaft. Replace the hand wheel, washer and

locking nuts (Fig. 2-4).

ML8890BH-12A

2-3

D. To install the start switch assembly. Remove the hand lever and clamping angle

(Fig. 2-9, Item 1 & 2) by removing the two pivot pins (Fig. 2-9, Item 3 & 4). Remove the manual

start switch (Fig. 2-9, Item 5). Remove the stop stud and locking nut (Fig. 2-9, Item 6 & 7).

Remove the clamping lever (Fig. 2-10, Item 1) by removing the lock nut and pivot bolt (Fig. 2-10,

Item 2 & 3). Install the start switch. (See Fig. 2-12).

FIG. 2-9 FIG. 2-10

FIG. 2-11 FIG. 2-12

E. To install the air cylinder assembly. See Fig. 2-12.

2-4

ML8890BH-13A

INS-2594

F. To install the Upper Motor. Remove the two cover retaining screws (Fig. 2-13, Item 1), and using

the screws provided install the upper motor (See Fig. 2-14).

FIG. 2-13 FIG. 2-14

G. To install the Emergency Stop Switch. Use the screws provided and install as shown

(See Fig. 2-15). MOUNTING

SCREWS

MOUNTING

SCREW

FIG. 2-15

2-5

ML8890BH-14

ML8890BH-15

SECTION III

ADJUSTMENT INSTRUCTIONS

Removetheneedle.

A. To set the Home Position. Returnthemachinetothehomepositionbyrotatingthe

manualcrankuntilthearrowsonthehomepositionlabelsare aligned. Making sure that

theairsupply is disconnected turn the power on. Loosening thehomepositionblock

retainingscrew(Fig. 2-8) and slide the home position blocktowardtherearofthemachine

asfarasthe adjusting slot will allow. Slowly pull the home position block toward the

operatoruntilthe indicator light on the home position sensorgoesout. Gentlypushthe

homeposition block toward the rearofthemachineuntiltheindicator light again comes on.

Tightentheretainingscrew.

B. Tosetthe first stitch position. Rotatethe machine with themanual crankuntil theleading

edgeofthe material clamp is aligned with the needle. Loosen the first stitch sensor block

retainscrewandpush the stitch sensor block toward therearofthemachine as far as it will

travel. Pullthefirststitchsensorblocktowardtheoperatoruntiltheindicatorlightonthe

firststitchsensorcomeson. Tightenthe retaining screw. Returnthemachinetothehome

position.

C. To set the needle up position. Rotatethe hand wheel until the needle bar is at todead

centerwiththelefthand looper at the extreme left hand end ofit’sstroke. Withthe

machineinthispositionloosenthesetscrewsonthe magnet disk. Rotate the magnet disk

untilthe magnet is aligned with the magnetsensoronthesynchronizerboardandas close

aspossibletoit without touching. Tightenthesetscrews.

Connectthe air supply.

CAUTION: With the air supply now connected the machine will cycle if the start

switch is depressed.

3-1

D. SENSOR and MOTOR FUNCTIONS. To test the sensor and motor functions, with the table motor

and sewing motor drive belts removed test the sensor and motor functions as described on

(page 6-1, B) of the programming manual. This will insure that the sensors and motors are

operating as intended in order to prevent any damage to the sewing head. Replace the drive belts.

E. TENSION RELEASE MECHANISM. Remove the cloth plates and set the machine to the Single

Step mode of operation (See programming instructions page 4-1). Depress the start switch, the

machine will cycle to the first stitch position. Depress the start switch a second time, the

machine will complete the stitching phase of the cycle and stop after the last stitch. With the

machine in this position insure that the tension release roller (Fig. 3-16, Item 1) is 1 mm from the

lobe on the tension release arm (Fig. 3-16, Item 2). If it is not, loosen the locking nut (Fig. 3-16,

Item 3) and set the gap using the adjusting screw (Fig. 3-16, Item 4).

NOTE: For fixed length machines, where the swing knife is actuated from the cam skip to step 9.

F. SWING KNIFE and LOOPER THREAD TRAPPER. With the machine still at the end of the

sewing phase of the cycle, insure that the swing knife actuating block (Fig. 3-17, Item 1) is 1 mm

from the swing knife linkage (Fig. 3-17, Item 2). When this gap has been properly set, depress the

start switch, the machine will move to the punch position phase of the cycle. With the machine in

this position insure that the looper thread trapper (Fig. 3-18, Item 1) is approximately 1 mm to the

right of the slot in the throat plate (Fig. 3-18, Item 2).

FIG. 3-16

1 mm

ML8890BH-16

3-2

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