Jack JK-797 Product guide

JaCK
雪�丸
JK 797
产晶使用说明书＆产晶零件图册
acK嘉主
From the library of Superior Sewing Machine & Supply LLC - www.supsew.com

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PROLOGUE
Thanking you for your purchase our products
sincerely, please reading the manual book before
operation, the
book introduce some points how to
operate, maintenance, and safe. Please keep it carefu-
lly for reading in the further; you will be not informed
if the file has been revised. Please set sample as
standard.
- 1 -
From the library of Superior Sewing Machine & Supply LLC - www.supsew.com

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OBSERVETHESE SAFETY PRECAUTIONS
Though Our takes the utmost care to produce
safe sewi ng machines and devices, operstors
should follow these basic safety rules.
• To prevent accidents,do not remove safety
devices or parts while operating the machine.
• Do not leave tools or other unnecessary
objects on the machine table while
operating the machine.
• Before maintenance,adjusting, cleaning,
threading or replacing the needle, and to
prevent accidents,be sure the power is
turned off.Check that the machine will not
operate when the pedal is pressed.
Note
In case a clutch type motor is used, it will
keep on rotating by inertia after turning
off power supply.
CD If the machine pedal
@ is stepped on inadvertently, it is
dangerous because the machine will move
unexpectedly.keep on stepping on the
pedal @ until the machine comes to a stop
after turni
ng off power supply.
• Turn the power off before leaving the
machine table.
• In the event of a power failure.be sure to
turn the machine off.
• Check that the machine is securely
groundee.
-1l -
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§~
CONTENTS
, tfl'.JE{f-11711... Frame Components
$'iE$ 1tj: (1) Cover Components(l)
$7ri-ffl17J\. (2) Cover Components(2)
[9 , ffB $@ $ {tj: Crankshaft Drive Components
TI, ttfHfl11J Needle Drive Mechanism
;\, __t ~ tttfl11J Upper Looper Drive Mechanism
-t, ~~tttfl11J Lower Looper Drive Mechanism
)\., *~tfl1zJ(l) Feed Mechanism(!)
fln *~tfl1zJ(2) Feed Mechanism(2)
+, __t)Jtfl11J Knife Drive Mechanism
+- , lli.B!Mfl11J Presser Foot Mechanism
+=, lU~tfl11J Thread Tension Mechanism
+ .=:. , 1}6t~tfl11J Thread Guide&Thread Mechanism
+12:9, ilIJffitfl1zJ(l) Lubrication Mechanism(l)
+TI, ilIJffitfl1zJ(2) Lubrication Mechanism(2)
+;\, H.R.~I H.R.Device
+-t, t~~~I Thread Stand
+ )\., tE : fflJff ~ iRi~I Parts For Semi-submerged Installation
+fL, ~ffl$ 1tj: (1) Specific Parts(l)
=+, ~ ffl $1tj: (2) Specific Parts(2)
=+- , ~ ffl $1tj: (3) Specific Parts(3)
=+=, ~ffl$ 1tj: (4) Specific Parts(4)
=+-, ~ ffl $1tj: (5) Specific Parts(5)
=+ [9, MHfl~ft{tj:{f-1171\. Accessories Assemblies
tff-1llt
:ii~ {tj: :zz Standard measurement part list
1
19
21
23
25
27
29
31
33
37
39
41
43
45
47
49
51
53
55
57
59
61
63
65
67
69
From the library of Superior Sewing Machine & Supply LLC - www.supsew.com

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BEFORE OPERA TING
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Schematic diagram of the machine table
Cut the table referring to the diagram
228.5 265
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270
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110
/
470)
550
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it
e ftJH~M-=f B ;;t;:.1"(J(1~zat·- - ----306nun
e {ii'.}fl~1!;1. ~~IE EFKA ~ Q UIC K ~ii'] fs:it: at ----334mm
Note
- I -
e Dim ension of m otors in Ja pa,n--- -- 306mm
e oim e ns io n of EFK motor 334mm
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BEFORE OPERATING
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1~ 100
Lubrication
After filling the oil pan, t he oi l sufrace should lie
between (H) and
(L} lines.
Add oil, when the oil surface reaches or goes
below
(L) .
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H
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L
- 2 -
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BEFOREOPERATING Manual lubrication
.:f-791~it!J¾t£r,iUJJtJLti'HJJ3f!lil~JflR-t, !!x:ffi Apply 2 or 3drops of oil by hand when the
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O machine
is used for the first time or has been
left unused for some time.
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High -speed sewing machine oil
- 3 -
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BEFORE OPERATING
Filling the HR device with silicon oil
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Fi ll the HR device with oil be fore it is too low in
order to prevent needle th read breakage and
fabric damage.
Note: Use Pegasus recommended silicone oil.
(UNI
ON CARBIDE CORPORATION)
UCCL-45(350)
- 4 -
From the library of Superior Sewing Machine & Supply LLC - www.supsew.com

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BEFORE OPERATING
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Threading
(i)
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JJi. '- Open three covers .
Swing the presser foot aside .
Needle thread
Trim the knots off neatly before
passing through the eye of the
needle to rethread.
Looper thread
Trim the knots off neatlyafter
pass i ng th r ough the eye of the
l ooper .
- 5 -
rem 1: Mt tr (J(J tt ~ fJt m
mttmta:tE - ~.
Knot the preset thread and the
th read being used together to
thread the machine .
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Be sure to thread the machine correctly
by referring to the threading diagram.
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Threading diagram
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TEST SEWING Presser foot pressure
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Loosen the adjusting nut ro and turn the adjusting
nut al to adjust t
he presser foot pressure.
It should
be as light as possible, yet be sufficient
to obtain the proper stit
ch formation.
- 6 -
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TEST SEWING Diff. feed ratio adjustment
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Loosen the adjusting nut 00 and turn the adjusting
nut
~ to adjustthe differential feed ratio.
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To shrink
- 7 -
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TEST SEWING
Adjusting the top feed pressure
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Loosen the
ad
justing nut
OO
and turn the adjusting
nut
a>
to adjust the top feed pressure.
It should be as light as possible, yet be sufficient
to obtain the proper stitch formation.
;
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- 8 -
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TEST SEWING
Adjusting the top feed front-to-back motion
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ffi :fJi ~ 1¥1 Mm ;;: • After loosening the adjusting nut~ , turn the
adjusting nut @ to adjust the top feed
front-to-back motion.
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- 9 -
From the library of Superior Sewing Machine & Supply LLC - www.supsew.com

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TEST SEWING Stitch length adjustment
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While pressing the push button, turn the
handwheel to seek the position at which the
push button goes further into the depth.
Then, keeping the push button pressed, turn
the handwheel and set the desired scale to
the aligning mark.
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Note: Stitch length ad justment must on ly be
made after the differential feed ratio
has been changed.
- 10 -
Coarse
/
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Fine
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TEST SEWING
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Thread tension
Make tensi on adjustments with the needle
thread knob
CD , the upper looper knob@ and
the lower looper knob® .
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- 11 -
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MAINTENANCE
DURING USE
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Cleaning the machine
- 12 -
Mainly the slots of t he needle plate and t he
feed rows should be cleaned.
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MAINTENANCE
DURING USE Replacing the needle
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* Check t he needle carefully to see that the scarf
is tu rn ed to the rear of the machine.
* Insert the needle to the proper depth, and fasten
securely.
ti~~ffltt: R~DCx27
Standard needle: Organ DC X 27
- 13 -
OK! NO!
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Scarf
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MAINTENANCE
DURING USE
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Checking the oil circulation
\\
OK!
- 14 -
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MAINTENANCE
DURING USE Checking and replacing the oil filter
Check and replace the oil filter every six months.
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- 15 -
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MAINTENANCE
ouR1NG usE Replacing the oil
ffi.il!J(.J{J :il~, iff1£-ft.lfl :fHiH 1- J=J ffi:il~ -Replace the oil one month after the first use and
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- 16 -
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