UnionSpecial LF600 Series Setup guide

Adjusting instructions and
illustrated parts list
Two- and three-needle, LF600 "Standard Class"
differential feed, flatbed coverstitch machines.
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FOREWORD
This technical manual has been prepared to guide you in the maintenance of your new
UNION SPECIAL machine. Careful attention to the instructions for operating and
adjusting these machines will enable you to maintain the superior perfonnance and
reliability designed and built into every UNION SPECIAL machine.
The Adjusting Instruction portion of this manual explains in detail the proper
setting for each of the components related to forming the s~itch and completing the
functions of the machine. Figures are used to illustrate the adjustments using
reference letters to point out specific items discussed.
Adjustments are presented in sequence so that a logical progression is
accomplished. Some adjustments performed out of sequence may have an adverse
effect on the function of other related parts.
Implementation of Preventive Maintenance Schedule can bring about significant
improvements in operator productivity by avoiding costly equipment breakdowns.
Whenever
it becomes necessary to make repairs or replace parts on your machine~ be
sure to insist on genuine UNION SPECIAL Repair Parts. These parts are designed
specifically for your machine and manufactured with utmost precision to assure long
lasting service.
This Ca ta 1 og has been made on the basis of avai1ab1e information. Changes in
design and/ or improvements may incorporate a s1i ght modi fi cation of configuration
in illustrations or part numbers.
Reprinted B/1192
CATALOG NO. 143R
For Styles
LF632K200MV
LF633K200MM
LF633K200MN
LF633K200MW
First Edition
Copyright 1987
By
Union Special Corporation
Rights Reserved In All Countries
Printed in U.S.A.
2
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Each UNION SPECIAL machine is identified by a Style number, which on this machine
Class, is stamped into the Style plate affixed to the right front of the machine.
The serial number is stamped into the bed casting at the left rear base of the
machine.
NOTE: Instructions stating direction or location. such as right, left, front, or
rear of machine, are given relative to the operator's position at the
machine, unless otherwise noted. The handwheel rotates counterclockwise in
operating direction, as viewed from the right end of the machine.
STYLES OF MACHINES
High speed, maximum performance, medium sewing capacity, two or three needle, one
looper, spreader, differential feed flat bed machines. Totally enclosed feed and
looper drive mechanism, fully automatic forced feed lubricating system with easily
replaceable oil filter, thumbscrew adjustable main and differential feeds,
independently driven rear needle guard and quick adjustable looper avoid.
LF632K200MV Two needle, four thread, offset differential feed machine for
attaching cellarettes to knitted undergarments, long length rib knit
strip cut perpendicular to the wale or parallel with the wale.
Stitch type 602. Standard gauge Nos. 8 and 12. Speeds up to 6000
R.P.M. Stitch range 9 to 16 S.P.l.
LF633K200MM Three needle, five thread, offset differential feed machine for
attaching cuffs and crotch seaming operation to knit garments.
Stitch type 605. Standard gauge No. 16. Speeds up to 6000 R.P.M.
Stitch range 9 to 16 S.P.l.
LF633K200MN Same as Style LF633K200MM except fitted with tandem differential feed.
LF633K200MW Same as Style LF633K200MM except fitted with parts for using a folder
to attach split tube borders to knitted undergarments. Stitch range
9 to 12 S.P.l.
3
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SAFETY RULES
CAUTION!
THIS SYMBOL INDICATES YOUR PERSONAL SAFETY IS INVOLVED
TO PREVENT PERSONAL INJURY:
-All power sources to the machine MUST be TURNED OFF before threading, oiling,
adjusting. or replacing parts.
Wear safety glasses.
All shields and guards MUST be in position before operating machine.
DO NOT tamper with safety shields, guards, etc., while machine is in operation.
LUBRICATION
IMPORTANT: Machine must be in a leveled position.
Oil has been drained from main reservoir before shipment. Use a straight mineral
oil with a Saybolt viscosity of 90 to 125 seconds at 100 degrees Fahrenheit. This
is equivalent to UNION SPECIAL Specification No. 175. Remove oil filler cap (A,
Fig. I) and fill to the TOP line of oil level gauge (B). Replace oil filler cap.
CAUTION! On new machines, machines that have been out of service for an extended
period of time OR machines that have been drained of oil and refilled
•... RUN MACHINE SLOWLY at 300 R.P.M. for approximately five minutes
while paying strict attention to the oil flow indicator which should rise
in the oil filler cap (A) and remain steady while machine is running.
This must be noted to ensure that oil flow indicator is functioning and
oil is circulating. Check oil level while machine is running which MUST
be maintained between the red lines of oil level gauge.
To maintain maximum recommended speed and serviceability of these machines, refer
to General Preventive Maintenance Schedule. Under no circumstances, should oil
remain in the machine for more than one year. Oil drain plug is located in bottom
of oil pan. ALWAYS change oil filter when oil is changed. At this time, evaluate
the contaminated condition of the oil to determine if the oil filter should be
changed more
or less frequently. To replace filter, remove four screws (C, Fig. 1)
and cover (0); lift out filter cartridge. REMOVE (brass) BY-PASS VALVE FROM TOP OF
OLD FILTER AND INSTALL IN NEW FILTER. Reassemble in reverse manner.
4
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l'l<.lt/1
LUBRICATION DIAGRAM
I~
• PRESSURE OIL
L'·IINLET
/-
•
D
Fig. I
5
SIPHON RETURN
FIL TEA BY-PASS
I
I
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PIVOT GUARD
TO LEFT FOR
THREAD I
A 111A
I
I
I
I
'
THREADING DIAGRAM
6
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NEEDLES
Each needle has both a type and size number. Type number denotes the kind of
shank, point, length, groove, finish, and other details. Size number, stamped on
the needle shank in metric, denotes largest diameter of blade, measured midway
between shank and eye. Collectively, type and size number represent the complete
symbol, which is given on the label of all needles packaged and sold by UNION
SPECIAL CORPORATION.
Standard recommended needle for machines covered is Type 128 GBS, Size 75/029.
Below is the description and sizes available:
NEEDLE TYPE
128 GBS
DESCRIPTION
Round shank, round point, short,
double groove, struck groove, ball
eye, spotted, ball point, chromium
plated.
SIZE AVAILABLE
65/025, 70/027,
75/029, 80/032,
90!036, 100/040.
To have needle orders promptly and accurately filled, an empty package, a sample
needle. or the type and size number should be forwarded. Use description on
label. A complete order would read
11
1000 needles, Type 128 GBS, Size 75/029".
The following instructions explain in detail the proper setting for each of the
components related to forming the stitch and completing the functions of the
machine.
Adjustments are presented in sequence so
accomplished. Some adjustments performed out
effect on the function of other related parts.
THREAD MACHINE AS ILLUSTRATED.
7
that a logical
of sequence may
progression is
have an adverse
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Fig. 2
Fig. 3
Fig. 4
TIMING FEED TO NEEDLE
Adjustment would be required if the machine
is feeding while the needles are in the
work. This can be accomp 1i shed by removing
top cover, head cover, left cloth plate, and
top feed chamber cover. Rotate handwheel in
operating direction to position needle bar at
bottom of stroke. At this time, the first
screws (A, Fig. 2) in the feed drive
eccentrics (B) must be on the flat of the
feed drive shaft and in a vertical position.
Adjustment can be made by loosening two
screws (A, Fig. 3) in upper mainshaft
sprocket (B). Hold the handwheel firmly with
needle
bar at bottom of stroke and rotate
pulley as required to position screws (A,
Fig. 2) so they are vertical. Tighten screws
(A, Fig. 3) securely.
SYNCHRONIZING LOOPER AND NEEDLE MOTIONS
NOTE: End cover has been removed for clarity
in Figure 4, but MUST BE IN POSITION
WHILE MAKING THE FOLLOWING ADJUSTMENTS.
Looper drive belt (A, Fig. 4) has proper
tension if, when turning handwheel in
operating direction to position looper in the
center of its (right to left) travel
there is no noticeable {right to left) play
in the looper mechanism. There should be
approximately 1/8 inch (3.2mm) deflection in
looper drive belt when pressing firmly with
thumb, midway between sprockets (8 and C).
Adjustment can be made by 1ooseni ng two
screws (A, Fig. 5) and turn looper module (D,
Fig. 4) counterc1 ockwi se to tighten be 1t or
clockwise to loosen, as viewed in Figure' 4.
Retighten screws (A, Fig. 5).
To synchronize machine, remove needle bar
eyelet guard, needle thread take-up wire
holder, needles, presser foot, throat plate,
looper, and feed dogs. Turn handwheel to
position needle bar at BOTTOM of stroke and
looper holder at EXTREME right end of travel.
8
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SYCHRONIZING LOOPER AND NEEDLE MOTIONS
(Continued)
Using gauge No. 21227 R, mount gauge plate
with throat plate attaching screws. Insert
pin (included with gauge) into looper
holder. Mount indicator block to machine
head with one of the screws removed from
needle bar eyelet guard. Insert shank of
indicator gauge into indicator block and
tighten screw against shank. See Sketch A
for reference. Rotate handwheel in OPERATING
direction until the pin in looper holder
contacts gauge plate. Loosen screw {A, Fig.
6) in needle bar connection (B) and position
needle bar (C) as required to set the pointer
of indicator gauge at "0" and tighten screw
(A) VERY LIGHTLY.
NOTE: This screw is specifically tightened
to ONLY 10- 12 in-lbs (12- 14 em/kg).
Rotate handwheel in REVERSE direction until
pin in looper holder again makes contact with
gauge
plate and note the reading on the
gauge. A variation of (1) graduation on the
scale is permissible. If the reading is
above "0". loosen screws (E, Fig. 4) and
turn rear looper drive sprocket (B) towards
the operator (clockwise as viewed in Figure
4). If the reading is below non, turn
sprocket away from operator (counter-
clockwise as viewed in Figure 4). Tempor-
arily snug screws.
Rotate handwheel in OPERATING direction until
pin in looper holder contacts gauge plate and
note the reading on scale. If the reading is
above "0". loosen screws {E) and turn
sprocket {B) away from operator
(counterclockwise as viewed in Figure 4). If
the reading is below "0", turn sprocket
towards the operator (clockwise as viewed in
Figure 4). Temporarily snug screws.
Continue
OPERATING
pointer of
graduation
handwheel
tightening
have .002
sprocket
connecting
to check and adjust in both
and
REVERSE directions until
indicator gauge comes within (1)
on the scale when turning the
in either direction. Before
screws (E)
securely, be sure to
inch (.051mm) clearance between
(B) and needle guard drive
rod (F).
9
Fig. 5
Sketch A
Fig. 6
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A lr.?
SYNCHRONIZING LOOPER AND NEEDLE MOTIONS (Continued)
LOQPFR I~
FRONT OF
t\Ei:OLE
Sketch B
OPERATING
DIRECTION
If a synchronizing gauge is not available ...
turn the handwheel in operating direction to
position looper point even with the left side
of RIGHT needle and check the distance from
the eye of needle to the bottom of 1 ooper
blade. Turn handwheel in reverse direction
to position looper point even with the left
I OOPFR
BEHIND
NEEDLE I '
side of RIGHT needle and check the distance
from the eye of needle to the bottom of
looper blade. If the distance was greater
when handwheel was turned in operating
direction. as shown in Sketch B, 1oosen
screws (E, Fig. 4) and turn rear looper drive
sprocket (B) away from operator
For Proper SYNCHRONIZATION of
looper & Ne~dle
the same
AI()H
Sketch C
REVERSE
DIRECTION 1
(counterclockwise as viewed in Figure 4). If
the distance was greater when handwheel was
turned in reverse direction~ as viewed in
Sketch C, turn sprocket towards the operator
Looper
BEHIND
Needle
-- -- -
Looper in
FRONT of
(clockwise as shown in Figure 4).
Needle
Temporarily snug screws. Continue to check
;,
OPERATING
Direction
;,
REVERSE
Direction
and adjust in both OPERATING and REVERSE
Ale!!
Sketch D
directions until the distance from the eye of
the right needle to the bottom of looper
blade is the same in either direction, as
shown in Sketch D. Before tightening screws
(E, Fig. 4) securely, be sure to have .002
inch ( .051mm) clearance between sprocket (B)
and
needle guard drive connecting rod (F).
10
Fig. 7
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