Union Special 199 User Manual
CLINTON'S
MODEL 199
UNDERBED TRIMMER
FOR
UNION SPECIAL 63900
ML199-4
PULLOFF
ASSEMBLY
NIPPER
NEEDLE
COOLER
TRIM AND WIPER
ASSEMBLY
FOLDER OPENER
SERVICE MANUAL
40-0252-01
ML199-5
TABLE OF CONTENTS
THREAD TRIMMER SECTION
SECTION I GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . 1
A. INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
B. APPLICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
C. TRIMMER COMPONENTS . . . . . . . . . . . . . . . . . . . 1
SECTION II TRIMMER INSTALLATION . . . . . . . . . . . . . . . . . . . . . . 2
A. PULLOFF ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . 2
B. TENSION RELEASE AND PULLOFF ASSEMBL Y. . 2
C. CUTTER AND WIPER ASSEMBLY . . . . . . . . . . . . . 2
D. SOLENOID AIR VALVE CONTROL UNIT. . . . . . . . . 2
E. NEEDLE COOLER . . . . . . . . . . . . . . . . . . . . . . . . . 2
F. FOLDER OPENER . . . . . . . . . . . . . . . . . . . . . . . . . . 2
SECTION III PRELIMINARY SETTINGS . . . . . . . . . . . . . . . . . . . . . . . 3
SECTION IV TRIMMER ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . 3
A. TENSION RELEASE AND PULLOFF ASSEMBL Y . . 3
B. CUTTER AND WIPER ASSEMBLY . . . . . . . . . . . . . 3
C. SOLENOID AIR VALVE CONTROL UNIT . . . . . . . . 3
D. FOOTLIFTER ASSEMBLY . . . . . . . . . . . . . . . . . . . 3
E. NEEDLE COOLER . . . . . . . . . . . . . . . . . . . . . . . . . 4
F. FOLDER THREAD WIPER . . . . . . . . . . . . . . . . . . . 4
SECTION V TRIMMER SEQUENCE OF OPERATION . . . . . . . . . . . 4
A. UNDERBED TRIMMER . . . . . . . . . . . . . . . . . . . . . . 4
B. TENSION RELEASE . . . . . . . . . . . . . . . . . . . . . . . . 4
C. NEEDLE THREAD WIPER . . . . . . . . . . . . . . . . . . . 4
SECTION VI TROUBLE SHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . 5
SECTION VII PARTS DRAWINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-12
GENERAL INFORMA TION
I.
A. INTRODUCTION
The air Operated Underbed Trimmer contains a trimming system that cuts both the
needle and bobbin threads simultaneously . A movable and a stationary blade, mounted
on the throat plate are used in combination to pick up and cut the threads.
Solid state electronics are used to sense the position of the needle and to trigger the
trimming mechanism at the proper time as well as to control footlifting and backtacking
operations.
B. APPLICATION
The underbed Trimmer/Positioner enables the operator to automatically control the
position of the needle in or out of the work, thereby eliminating the need for hand positioning. In addition, the top and bottom threads are automatically cut beneath the throat
plate after positioning. This eliminates the need for hand trimming.
ML199-6
C. SYSTEM COMPONENTS
The trimmer components, which can be either pre-installed on the sewing machine head
and factory tested, or field installed, include:
1. Standard Components
a. Pulloff Assembly
b. Tension Release and Pullof f Assembly
c. Thread Cutter and Wiper Air Cylinder Assembly
d. Solenoid Air V alve Control Unit
2. Optional Components
e. Foot Lifter
f. Needle Cooler
g. Folder Opener
D. TUBING
1/8” O.D. X 1/16” I.D. 3/16” O.D. X 3/32” I.D. 1/4” O.D. X 1/8” I.D.
MATERIAL VINIL MATERIAL POL YURETHANE MATERIAL POLYURETHANE
30-1134-01 CLEAR 30-1540-01 CLEAR 30-2102-01 CL EAR
-02 YELLOW -02 YELLOW -03 RED
-03 RED -03 RED
-04 BLACK -04 BLACK
-05 BLUE -05 BLUE
-06 GREEN -06 GREEN
-07 ORANGE -07 ORANGE
-08 WHITE -08 WHITE
-09 GRAY -09 GRAY
-10 BROWN -10 BROWN
II.
TRIMMER INSTALLATION
A. PULLOFF ASSEMBLY
Remove the machine face plate and mount the Pulloff assembly as shown in INS-2377.
B. TENSION RELEASE AND PULLOFF ASSEMBLY
1. Remove from the machine the thread tension discs assembly and tension release
pin.
2. Drill and Tap mounting holes using appropriate drill fixture supplied. Refer to machine
drilling instructions shown in drawing INS-2355.
3. Mount tension release assembly and the thread tension discs assembly to the sewing
machine as shown in drawing INS-2353.
C. CUTTER AND WIPER ASSEMBLY
1. Remove from the machine throat plate and feed shaft clamp plate.
ML199-7
2. Rework clamp plate as shown in drawing INS-1630 and fasten to the machine.
3. Fasten cutter and wiper cylinder assembly to sewing machine bed.
4. Mount new throat plate assembly on the machine with original hook basket retaining
finger.
D. SOLENOID AIR VALVE CONTROL UNIT
1. Mount solenoid valve assembly in back of the machine bed as shown in INS-2379.
2. Mount foot lifter air cylinder assembly as shown in INS-2379.
E. NEEDLE COOLER
1. Fasten needle cooler tube to presser foot and roller housing bracket.
2. Mount treadle air valve assembly supplied between the motor and treadle arm.
F. FOLDER OPENER
1. Mount folder opener air cylinder assembly on bed of machine.
2. Assemble the folder opener assembly to the machine cylinder arm.
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III. PRELIMINARY SETTINGS
NOTE: Do not connect the air supply at this time.
1. Set the machine head in the table and install "V" belt.
2. Time sewing machine to normal sewing conditions.
3. Connect all air lines as shown in circuit diagram drawing INS-2339.
4. Connect all electrical cables to the main control box.
5. Thread the sewing machine and sew on material being used on the operation.
IV. TRIMMER ADJUSTMENTS
A. TENSION RELEASE
Adjust puller for sufficient thread tail left on needle to start sewing on the next cycle.
ML199-8
B. CUTTER AND WIPER ASSEMBLY
1. Loosen the 10-32 nut on the cylinder shaft and adjust the knife travel so that the
cutting edge is about 1/16" past the cutting edge of the stationary blade.
2. Adjust the wiper to pass between the needle and the presser foot without striking
either. By loosening the two nuts on the cylinder shaft, the assembly will rotate
around the screw to position the wire hook. Bending may be necessary for proper
thread pickup.
3. With the power and air off, manually stimulate the trimmer sequence of operation
cycle several times to insure that the proper adjustments have been made.
C. SOLENOID AIR VALVE CONTROL UNIT
Turn power and air on. Set regulator to read 60 PSI and adjust the flow control of the
trim air cylinder to reduce bobbin spin.
D. FOOTLIFTER ASSEMBLY
Adjust footlifter cylinder for required amount of lift. Readjustment of footlift linkage may
be necessary .
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