Clinton AS-870 Manual de usuario

CLINTON

MODEL AS-870 / 870LCD

VARIABLE SPEED

DC SERVO MOTOR

NEEDLE POSITIONER THREAD TRIMMER

NEEDLE COOLER

SERVICE MANUAL

TABLE OF CONTENTS

SECTION I - INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

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

CONTROL BOX TO MOTOR . . . . . . . . . . . . . . . . . . . . . . . .

MOTOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SYNCHRONIZER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

LCD DISPLAY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SWITCH BOX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

POWER AND CABLE CONNECTIONS . . . . . . . . . . . . . . . . .

MOTOR ROTATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-1

2-2

2-3

SECTION III - SYNCHRONIZER TIMING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

A. UNDERTRIMMER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

SECTION IV - CONTROL BOX ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

A. MAXIMUM SEWING SPEED. . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

SECTION V - PROGRAMMABLE LCD DISPLAY . . . . . . . . . . . . . . . . . . . . . . . 5-1

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

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

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

PULLEY RATIO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TEST PROGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1. TREADLE TEST. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2. SYNCHRONIZER TEST . . . . . . . . . . . . . . . . . . . . . . . . . .

3. ENCODER TEST. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4. DIVIDER TEST. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-1

5-3

5-4

SECTION VI - CONNECTOR DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

SECTION VII - DRAWINGS AND PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1

MAJOR ASSEMBLIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

MOTOR ASSEMBLY, DC SERVO . . . . . . . . . . . . . . . . . . . . .

CONTROL BOX ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . .

POWER SUPPLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SYNCHRONIZER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

PROGRAMMABLE DISPLAY . . . . . . . . . . . . . . . . . . . . . . . . .

MISCELLANEOUS PARTS . . . . . . . . . . . . . . . . . . . . . . . . . .

E-PROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7-1

7-2

7-4

7-5

7-6

7-7

7-8

ML870LCD-2A

SECTION I ML870LCD-3A

INTRODUCTION

Clinton's Model 870LCD is an electronically controlled variable speed drive for industrial sewing

machines. The drive consists of a brushless DC Servo Motor, controller with a microcomputer,

synchronizer, speed control and programmable LCD display. No clutches or brakes are used. All

components interact to give a fast accurate and reliable sewing machine drive. The components

of the system are shown are shown in figure below.

The model 870LCD has outputs for a trimmer, footlift, wiper and needle cooler. It can be used to

operate all Clinton trimmers, as well as the Singer, Union Special, Pfaff, Juki, Brother

undertrimmers and chain stitch machines.

The programmable LCD display is used to select the trimmer type and other parameters.

See section V.

MOTOR INSTALLATION

FIG. 2-1

INSTALLATION

A. CONTROL BOX TO MOTOR

Refer to the control box assembly parts drawing in figure 7-3. Attach the mounting brackets to

the control box then, mount the control box to the motor with the hardware provided.

B. MOTOR

1. Drill three holes in the sewing machine table as shown in figure 2-1.

2. Mount the motor to the table using the spacers, carriage bolts, nuts, washers, and flanged

spacers supplied (See Figure 7-2). Install pulley and belt then check the following:

a. The motor is mounted so that the motor drive pulley and sewing machine drive pulley

are properly aligned.

b. The V-belt connecting the motor to the sewing machine should be tensioned properly.

It should be possible to pull a correctly tensioned belt together between two

fingers within approximately 2 cm (3/4"). Excessive tension may not onlyshorten the

life of the bearings, but could also affect the operation of the sewing machine. A loose

belt will affect positioning accuracy.

c. Install the belt guard.

2-1

ML890-7A

SECTION II

C. SYNCHRONIZER

Two methods are used to attach the synchronizer to the handwheel. They are (1) handwheel turned down to

accept synchronizer and (2) an adapter that is mounted to a machined handwheel.

Refer to figure 2-2 and install the synchronizer as follows:

SYNCHRONIZER INSTALLATION

UNIVERSAL MOUNT

FIG. 2-2

1. Install adapter if used.

2. Mount and secure synchronizer to handwheel or adapter.

3. Position the synchronizer retaining rod and clamp as shown in figure 2-2. Make sure that the rod

clears the sewing machine belt.

4. Using the mounting clamp hole as a guide, drill and tap a 10-32 hole in the machine casting. Secure

clamp and rod with a 10-32 X 1/2 B.H.M.S.

5. Drill a 1-1/4" Dia. hole in table to route synchronizer cable to logic box. Check that cable has adequate

slack when tilting machine for service.

D. LCD DISPLAY

Mount the LCD display console at a

convenient location on the table top

as shown in figure 2-3. Route cable

through same hole that synchronizer

cable passes through.

E. SWITCH BOX

Install switch box at a convenient

location under the table.

See figure 2-4.

2-2

ML890-8A

FIG. 2-3

FIG. 2-4

F. POWER AND CABLE CONNECTIONS

Refer to figure 2-5 and connect all cables as shown. The system can be operated from 230V, 3

phase or 230V, single phase power. See figure 2-5.

Caution: It is important that the ground wire be connected between the motor and sewing

machine to prevent a static charge buildup at the sewhead.

2-3

G. MOTOR ROTATION

Temporarily remove the "V" belt. Turn power on then move the pedal forward and

note the direction of motor pulley rotation. If incorrect, do the following:

1. Turn power off.

2. Refer to section V-B, Hidden Parameters, and follow the instructions to change

motor rotation. The parameter is in the "**** Toggle Switches" group.

3. Install the "V" belt.

FIG. 2-5

ML890-9B

SYNCHRONIZER TIMING

Turn the power off before making synchronizer adjustments. Refer to figure below for all adjust-

ments and perform the steps below to time the synchronizer.

1. Remove cover from synchronizer, then loosen the disc locking screw.

2. Rotate the handwheel so that the take up during the rising portion of its cycle is

approxiamately 1/16" below its highest position.

3. Rotate the UP sensor disc until the notch is centered in the photo interrupter module.

4. Turn the handwheel until the needle is positioned down.

5. Rotate the down sensor disc until the notch is centered in the photo interrupter module.

6. Rotate the handwheel until the needle thread is positioned between 6 and 7 o'clock around

the bobbin case. Rotate the trim disc until the notch is centered in the photo interrupter

module.

7. Tighten the disc locking screw and replace the cover.

NOTE: After power is turned on a fine adjustment may be necessary and can be made by

positioning the needle under power and noting the actual needle UP and needle DOWN

and 6 o'clock stopping positions. If any of the positions are not correct, readjust the

appropriate disc.

3-1

SECTION III

ML890-

10A

A. MAXIMUM SEWING SPEED

Maximum sewing speed can be adjusted by changing the "MAXIMUM SPEED" parameter in the

"LCD" display (see section V).

4-1

ML870LCD-8B

SECTION IV

CONTROL BOX ADJUSTMENTS

SECTION V ML870LCD-4A

PROGRAMMABLE LCD DISPLAY

The LCD display, shown in fig. below is used to program and set the various parameters of the

870LCD; SPEEDS, TIMERS, COUNTERS, and TOGGLE SWITCHES.

Two (2) different modes of operation are

available. They are:

1. Operating Mode

2. Programming Mode

When power is turned on, the display

is in the operating mode.

There are two (2) groups of parameters that are accessed in different ways. They are : (1) param-

eters with direct access and (2) hidden parameters with indirect access. In addition a master reset

is available to reset all parameters to their default values.

A. DIRECT ACCESS PARAMETERS

The direct access parameters are divided into four (4) groups. They are (1) SPEEDS, (2)

TIMERS, (3) COUNTERS, and (4) TOGGLE SWITCHES. Table 5-1 describes each parameter,

shows the default value and range of adjustment for each parameter.

To change a parameter, follow the sequence described below.

1. Press the key to enter the programming mode. Continue pressing this key until the

parameter group that is to be changed is displayed. As an alternative; press the key to enter

the programming mode and display the last changed parameter.

2. Press the key to step to the next parameter in the selected group.

3. Press the key to increase or the key to decrease the contents of the displayed

parameter. Both keys are used to toggle parameters between states in the Toggle Switches

group. Hold the key closed to make the display step automatically.

4. Press the key to return to the operating mode.

TABLE 5-1

TABLE 5-2

ML870LCD-9

PARAMETER DESCRIPTION DEFAULT RANGE

****SPEEDS RPM RPM

TRIM

MAXIMUM

Machine speed during the position trim cycle.

If *** Tgl switch "position" is set to w/ramp the

"trm/pos" speed affects the slope of the ramp.

If "no ramp" is selected, position speed is

constant and can be changed by the "trim/pos"

parameter

Maximum sewing machine speed. The speed

cannot go higher than 3500 times the pulley

ratio

220

4200

100-400

8000

****MISCELLANEOUS

HYSTERESIS

PF DUTY

T.BK.DEL

The amount the pedal has to be moved when

going from one direction to the other before the

speed changes.

Average voltage applied to Pr. Ft. solenoid. The

voltage should be high enough to keep the

solenoid energized without overheating.

Delays reversing of motor until the trim cycle is

finsished. See "TURNBAK" parameter.

1-10

2-10

3-15

SELECT TRIM SYSTEM

Press then keys first, then use or keys

to select one of the following trimmers, NO TRIM SYS, CLINTON

LOCKST, JUKI/DURKOPP, PFAFF MECH, BROTH/PFAFF PN,

SINGER/UNION, CLINTON T & B TRIM or CHAIN ST.

CLINTON

LOCKSTITCH

****TOGGLE SWITCHES

DIRECTION

POSITION

AFTER TR

SAFETY SW

SAFETY SW SEW

Direction of motor rotation viewed from pulley.

Select position with ramp or position at constant

position speed.

Not used in this system.

Set to enable only on machine with trimmer

safety sw. If enabled, machine will not run

unless safety switch is properly connected.

Set to CLS if safety switch is closed while

sewing or OPN if switch is open while sewing.

OFF

CONTINUE

DISABLE

CLS

ON/OFF

CONTINUE/

PED. NEUT.

ENABLE/

DISABLE

CLS/OPN

5-2

PARAMETER DESCRIPTION DEFAULT RANGE

SPEED GROUP RPM RPM

MINIMUM

SLOW STRT First speed when pedal is moved forward.

Initial speed at start of cycle (after trim).

This speed is maintained for No. of stitches set

by soft start count parameter.

180

500

80-400

150-1000

TIMER GROUP MS MS

STRT DEL

TRM TIME

WIPER TIME

Delays machine start to allow presser foot to

drop.

Clinton Lockstitch- Time machine stops at

6 o'clock position to pick up threads.

Wiper Pulse time.

120

10-500

10-1000

0-1000

COUNTER GROUP STITCHES STITCHES

SOFT ST Number of stitches sewn at soft start speed

after trim (EOC). 31-25

TOGGLE SWITCHES

PF/SEAM

PF/EOC

SOFT STRT

HEEL 2

TURNBAK

POSITION

Pr. Ft. UP or DOWN in seam, treadle neutral.

Pr. Ft. UP or DOWN after trim, treadle neutral.

Used to turn soft "ON" or "OFF".

If "ENABLED", trims with heel 2. If "DISABLED"

no trim with heel 2.

If "ON", machine rotates in reverse direction

after trim, to move needle to its highest position.

Selects the needle position in the seam to "UP"

or "DOWN".

DOWN

OFF

ENABLED

OFF

DOWN

UP/DOWN

ON/OFF

ENABLE/

DISABLE

ON/OFF

UP/DOWN

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