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.
- 2 -
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 .
- 3 -
E. NEEDLE COOLER
Adjust the flow control for the desired air flow to cool the needle and keep the throat plate
knife clean.
F. FOLDER OPENER
Adjust folder opener mounting bracket for required amount of opening.
V.
TRIMMER SEQUENCE OF OPERATION
A. UNDERBED TRIMMER
The operation of the underbed trimmer is as follows:
1. Needle positioner stops with the needle thread positioned between the 5 and 6 o'clock
position across the hook. The needle is used for the reference point or 12 o'clock
position.
2. The movable knife is extended into the needle loop and in position to pick up the
bobbin thread.
ML199-9
3. The needle positioner moves the takeup and needle to up position.
4. The tension release, the pulloff and wiper cylinders operate after the positioner
reaches to up position.
5. Then the movable knife is returned to cut both needle and bobbin threads.
B. TENSION RELEASE
The needle thread tension is released so that the thread puller can pull off enough
thread to start the next sewing operation.
C. NEEDLE THREAD WIPER
The needle thread wiper pulls the needle thread above the foot before it is raised. If the
thread is trapped under the foot a long tail will be left at the start of the next sewing
opera-tion.
- 4 -
ML199-10
VI.
TROUBLESHOOTING
PROBLEM PROBABLE CAUSE CORRECTIVE ACTION
Needle thread not cut.
Bobbin thread is cut
Both threads not cut not
picked up
Both threads picked up not
cut
Positioner solenoid binding
Movable blade missed needle
loop
Binds in trimmer linkage
Defective movable blade
Water in air lines
Defective solenoid air valve or air
cylinder
Defective needle positioner logic
Binds in trimmer linkage
Defective movable or stationary
blade
Stroke misadjusted failing to
reach cutting position
Remove bind
Check synchronizer timing
to see that trimmer is fired
at correct time
Locate and remove bind.
A light bind would slow it
enough to miss needle
loop
Replace
Check filter. Remove
water from air lines
Repair or replace
Repair logic
Locate and remove bind
Replace
Readjust
Needle thread cut short Pulloff cylinder improperly
adjusted
Long tail left on top side at
start of sewing
Bobbin thread is cut short
Wiper not operating or incorrectly
positioned causing thread to be
trapped under foot
Bobbin tension too tight
Bobbin thread slipped out of hook
on case
Bobbin case without hook being
used
- 5 -
Readjust
Repair or reposition thread
wiper as required
Lossen bobbin tension as
much as possible
Run bobbin thread
through hook
Replace with correct
bobbin case
PULLOFF ASSEMBL Y
MODEL 199 U.S. 63900
80-0503-01
INS-2377C
ML199-11
INS-2337E
TRIM AND WIPER ASSEMBLY
MODEL 199 FOR U.S. 63900
80-0514-01
TENSION RELEASE ASSEMBLY
MODEL 199 U.S. 63900
80-0517-01
INS-2353C
INS-2354A
AIR CYLINDER THREAD RELEASE ASSEMBL Y
MODEL 199 U.S. 63900
10-1403-01
-6-
DRILLING INSTRUCTIONS / DRILL FIXTURE KIT
MODEL 199 FOR U.S. 63900
10-1405-01
ML199-12
INS-2355A
.187
01-4944-01
BASE PLATE
01-3053-01
STUD
01-3038-61
BUSHING
01-3052-01
NUT
DRILLING AND MOUNTING INSTRUCTIONS
THREAD NIPPER ASSEMBLY 61400 M, T, W - 63900 M, T, W
REWORK - TAKEUP SPRING THREAD WIRE 61400 M, T, W
THREAD NIPPER
01-5010-01
SPRING
01-5798-01
BRACKET
01-4943-01
PLATE NIPPER
UNION SPECIAL
# 61453-6
61400 M, T , W
CUT OFF SHADED AREA
10-0477-01
THREAD NIPPER
.656
.312
INS-765B
63900 M, T , W
STEP 1.
REMOVE LOWER NEEDLE
THREAD EYELET & SCREW
AS SHOWN.
STEP 2.
REPLACE EYELET & SCREW
WITH THREAD NIPPER
ASSEMBLY (10-0477-01).
61400 M, T , W
STEP 1.
DRILL AND TAP HOLE SQUARE (90O) TO SURFACE
OF MACHINE USING # 31 DRILL AND UNION
SPECIAL #V107 TAP.
STEP 2.
MOUNT THREAD NIPPER ASSEMBLY (10-0477-01).
- 7 -
FOLDER ASSEMBLY
MODEL 199 FOR U.S. 63900
80-0513-01
NOTE:
ALL PAR TS NOT IDENTIFIED ARE
SUPPLIED BY UNION SPECIAL.
SEE UNION SPECIAL MANUAL.
33-3105-08
SCREW S.H.C.S.
33-3108-12
SCREW S.H.C.S.
02-2652-01
BLOCK
33-0706-20
SCREW FIL.H.M.S.
INS-2335B
02-2702-01
BRACKET-SOL.
MOUNT
30-2553-01
AIR CYLINDER
30-1783-01
ELBOW
ML199-13
INS-1667C
ACCUSTOP
SYNCHRONIZER ADAPTER MOUNTING FOR U.S. 63900
80-0323-51
REWORK FEED SHAFT CLAMP PLA TE
CHAMFER THIS
CORNER APPROX.
AS SHOWN
INS-1630-1
UNION SPECIAL
#63939F
MACHINED DOTTED
AREA TO THE
COUNTERBORES
-8-
01-4936-
01
TUBE
01-493801
CLAMP
30-106401
SCREW
NEEDLE COOLER ASSEMBLY
80-0204-03
ML199-16
MODEL 199
(MACHINE REAR VIEW)
TENSION
RELEASE
ASSEMBLY
FILTER,
REGULATOR,
GAUGE
ASSEMBLY
SOLENOID
VALVE
ASSEMBLY
NEEDLE
COOLER
ASSEMBLY
FOOTLIFTER
ASSEMBLY
-11-
INS-2379B
-12-
INS-2341D
THROAT PLATE ASSEMBLY
MODEL 199 FOR U.S. 673900
80-0515-01
FOOTLIFTER ASSEMBLY
MODEL 199 FOR U.S. 63900
80-0180-125
ML199-17
FILTER/REGULATOR
OPERATION
AIR ENTERS THE INTEGRAL FILTER/REGULA TOR UNIT AND IS DIRECTED DOWNW ARD
THROUGH A SET OF LOUVERS (10) TO IMPAR T A WHIRLING ACTION. THIS CENTRIFUGAL ACTION CAUSES LIQUID PARTICLES TO BE SEP ARA TED FROM THE AIR STREAM
AND SETTLE TOT HE BOTTOM OF THE BOWL. ACCUMULA TED LIQUID IS DRAINED
MANUALLY (15).
AIR THEN PASSES THROUGH THE SINTERED BRONZE FIL TER ELEMENT (1 1) WHERE
SMALLER SIZE FOREIGN PARTICLES ARE REMOVED.
THE CLEAN AIR PASSES THROUGH THE V AL VE (5,6,7,8) OF THE REGULA TOR AND IS
CONTROLLED TO A PRESSURE, DETERMINED BY THE ADJUSTMENT OF THE REGULAT OR.
PRESSURE IS INCREASED BY ROTA TING THE KNOB CLOCKWISE, OR DECREASED BY
ROTA TING THE KNOB COUNTERCLOCKWISE.
CAUTION: THIS MINIATURE INTEGRAL FILTER/REGULATOR SHOULD NOT BE USED IN
MAINTENANCE:
REGULATOR SECTION: DISASSEMBLE THE REGULA T OR SECTION AS FOLLOWS: TURN OFF
AIR SUPPLY. TURN THE ADJUSTING KNOB COUNTERCLOCKWISE TO RELIEVE COMPRESSION
ON THE REGULATING SPRING (2). UNSCREW THE BONNET (1), REMOVE THE REGULA TING
SPRING (2), AND PISTON ASSEMBLY (4). UNSCREW THE VALVE SEAT (5) WITH A 3/8"
SOCKET AND REMOVE THE VAL VE ASSEMBL Y (7) AND V AL VE SPRING (8).
CLEAN AND INSPECT EACH PART FOR WEAR OR DAMAGE. REPLACE IF NECESSAR Y.
CAUTION: WHEN REASSEMBLING, VALVE SEAT (5) SHOULD NOT BE TIGHTENED TO MORE
MANUAL DRAIN FILTER SECTION: T O SERVICE THE FIL TER SECTION SHUT OF THE AIR
PRESSURE. UNSCREW BOWL ASSEMBLY (14) AND REMOVE "O" RING (9) UNSCREW STUD (13)
AND FROM THE STUD REMOVE FILTER ELEMENT (1 1), LOUVER (10) AND GASKETS (12).
THE FILTER ELEMENT SHOULD BE CLEANED PERIODICALL Y WITH KEROSENE AND BLOWN
OUT WITH COMPRESSED AIR.
AFTER CLEANING, INSPECT EACH PART CAREFULL Y, REPLACE ANY DAMAGED PARTS. WHEN
REASSEMBLING, TIGHTEN STUD (13) TO 5 TO 10 INCH POUNDS TORQUE.
APPLICATIONS WHICH MA Y EXCEED 250 PSIG. DURING MAINTENANCE PERIODS,
INSPECT AND CLEAN EACH PART CAREFULLY, USING ONLY CLEAR, WARM
WATER OR KEROSENE. DO NOT USE SOLVENTS AS THE POLYCARBONATE BOWL
MA Y BE DAMAGED.
THAN 4 TO 6 INCH POUND TORQUE. BONNET ASSEMBLY (1) SHOULD BE
TIGHTENED 50 TO 60 INCH POUNDS TORQUE.
ML-000-5B
FILTER, REGULATOR, AND LUBRICATOR
30-2347-01
30-1160-01
BONNET
30-2788-01
FILTER/REG.
REPAIR KIT
(CONTAINS ITEMS
3,4,5,6,7,8,10,14,16)
30-2797-01
LUBRICATOR
CAUTION: THIS UNIT HAS A POLYCARBONATE BOWL.
1. BE SURE IT IS NOT MOUNTED WHERE TEMPERATURES OF 125 FOR MORE WILL BE
NEAR IT , OR ON A LINE WHERE AIR PRESSURE EXCEEDS 150PSI.
2. BEWARE OF CONDITIONS, FUMES AND FLUIDS THAT WILL HARM THE TRANSP ARENT
BOWL.
3. TO CLEAN BOWL, RINSE OR WIPE WITH A PETROLEUM SOLVENT ONL Y, SUCH AS
KEROSENE, OR HOUSEHOLD DISHWASHER DETERGENT .
4. DO NOT USE NEAR, OR CLEAN WITH SUCH MATERIALS AS ACETONE, ALCOHOL,
BENZENE, DIOXANE, ETHEL ACETA TE, LACQUER THINNER, TOLUENE, CHLORIDE,
CARBON TETRACHLORIDE, ALKALIES, AMINES, ESTERS, KETONES AND AROMA TIC
HYDROCARBONS.
5. DO NOT INSTALL ON A COMPRESSED AIR LINE WHERE THE COMPRESSOR IS LUBRICATED WITH, OR THE AIR CONT AINS, A SYNTHETIC, FIRE-RESIST ANT LUBRICANT .
IMPORTANT: INSTALLATIONS INSTRUCTIONS FOR LUBRICATORS.
WHERE AND HOW TO INSTALL:
1. INSTALL AS CLOSE AS FEASIBLE TO EQUIPMENT T O BE LUBRICA TED WITH AIR
FLOWING IN AND OUT PORTS SO MARKED.
2. TO FILL THE LUBRICATOR, TURN OFF AIR PRESSURE, REMOVE BOWL AND FILL.
3. POUR IN ONLY CLEAN OIL. SAE 10 OR LIGHTER USUALL Y IS BEST, NEVER USE
ONE OF THE FOLLOWING OILS: CELLULUBE #150 AND #220, KANO KROIL,
KEYSTONE PENETRA TING OIL #2 OR PYDRAUL AC.
4. AS SOON AS AIR PRESSURE REBUILDS INSIDE THE BOWL, OIL WILL DRIP THROUGH
THE SIGHT GAUGE. CONTROL THE RATE OF OIL ENTERING THE AIR STREAM BY
TURNING THE ADJUSTMENT SCREW DOWN TO GIVE LESS OIL AND UP TO GIVE MORE
OIL. THIS IS A UNIQUE LUBRICATOR. YOU ADJUST THIS TYPE SO THA T WHILE
THE SMALLEST AMOUNT OF AIR IS FLOWING THROUGH IT YOU GET THE DESIRED
AMOUNT OF OIL FOR THAT FLOW . THE MORE THE AIR FLOW INCREASES, THE MORE
OIL YOU WILL NEED AND THE MORE YOU WILL GET AUTOMATICALL Y.
HOW TO MAINTAIN:
1. PERIODICALLY CLEAN ADJUSTING SCREW NEEDLE V ALVE AND SEAT BY SWISHING A
CLEANER AND BLOWING OFF WITH AIR.
2. DRAIN OFF ANY CONTAMINANTS OR WA TER IF THEY SETTLE IN THE BOTTOM OF
THE BOWL.
30-1108-01
FILTER ELEMENT
5 MICRON
30-1561-01
BOWL
30-1085-01
BOWL
30-1610-01
LUBRICATOR
REPAIR KIT
(CONTAINS ITEMS
18,20,22)
INS-2100-2A
INS-2100-1B
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