artisan 797 AB-800 User manual

®
AQ Ti S
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CONTENTS
l.Instruction Manual
1, SAFETY PRECAUTIONS 3
10, LUBRlCATION."" ,., ,.. ,.. " ", , ",." , " .. , , , ,7
11, CONDITION OF OIL LUBRlCATION.", .. ,. ,.. ,.. , ,.. , , '" ,.. ,.. ,., , ,7
14, PERIODICAL CLEANING, , , , , ,8
15,HANDLING INSTRUCTIONS (MOTOR AND CONTROL BOX).. , ", , , ,9
16, INSTALLATION OF BELf COVER." .. " , " " " ,.9
21, ADJUSTING THE THREAD TENSION "., '., ,.", .., , , " ' ,.11
22, UPPER THREAD TENSION "., , " ,12
29, ADJUSTMENT OF WALKING FOOT AND PRESSER FOOT, ,.. ,., ,.., , ,.. , ,.,l4
2, PRECAUTIONS BEFORE STARTING OPERATION 3
3, PRECAUTIONS FOR OPERATING CONDITIONS 3
4, SPECIFICATIONS "", .. ,.. ", .. ,.. ".",.,.,.", "." ,., , ,., ,., .. " .4
5, POWER CABLE CONNECTION ,.,,.,, ,,,., ,,,,., ,,.,, ,,,, ,,.,,.. ,.' ., ,.. .4
6, CONNECTION OF CONTROL BOX ,." , ,., , , 5
7, INSTALLING THE BELT, ,." " , , ,., , '" ,.. ,.. , 6
8, ADJUSTMENT OF NEEDLE BAR STOP POSITION " ,., "' , ,, , 6
9, INSTALLING THE KNEE LIFTER , ,.. " , ' , , " 7
12, ADJUSTMENT OF THE HOOK LUBRICATION" " , " , , , .. 8
13, ADJUSTMENT OF OIL PUMP , ," , , , , 8
1:, HOW TO WIND THE LOWER THREAD " " .. , ,, " 10
18, HOW TO ATIACH ANEEDLE , , , , , 10
19, HOW TO ROUTE THE UPPER THREAD " " , , 11
20, ADJ USTMENT OF STITCH LENGTH AND REVERSE SEWING. , ,.. , , , ,,, 11
23, LOWER THREAD TENSION , , ,.. , .. , .. , , , , 12
24, ADJUSTMENT OF PRESSER PRESSURE, ,., ,., , , , 12
25, FEED DOG HEIGHT , , , 13
26, ADJUSTMENT OF FEED DOG INCLINATION ", " , 13
27, ADJUSTMENT OF STITCH LENGTH AND FORWARDIBACKWARD, , 13
28, PRESSER BAR LIFTER., , """" ,.. "", , ", '."", '" ,.. " '.',., .. ".,., ,'." ,, 14
30, ADJUSTMENT OF FEED TIMING ', .. ,., , ". '" , ' ' '.. , 16
31, ADJUSTMENT OF THREAD TRIMMER MECHANISM " 16
2.Parts Catalog
A. ARM BED AND ITS ACCESSORIES , , " 'j"20
B. SEWING MECHANISM , , .. , , 23
C. SEWING MECHANISM & FEED ROCK LOWER SHAFT, "." "., .. , " ,., 26
D. STITCH LENGTH MECHANISM , , , , , 29
E. UPPER FEED ROCK SHAFT MECHANISM.. , , , 32
F. UPPER FEED LIFTING ROCK SHAFT MECHANISM , , ,.. , 34
G. PRESSER FOOT MECHANISM , ,., 37
H. KNIFE ACTUATING MECHANISM 39
-1-

1. TOUCH BACK & DETECTOR MECHANISM .42
J. On... LUBRICATION MECHANISM .44
K. ACCESSORIES .46
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1, Safety precautions:
1) When tlrrning the power on, keep your hands and fingers away from the area around/under the needle and
the area around the pulley.
2) Power must be turned offwhen the machine is not inuse, or when the operator leaves the seat.
3) Power must be turned offwhen tilting the machine head, installing or removing the "V" belt, adjusting the
machine, or when replacing.
4) Avoid placing fingers, hairs, bars etc., near the pulley, "V' belt, bobbin winder pulley, or motor when
the machine
is in operation.
5) Do not insert fingers into the thread take-up cover, under/around the needle, or pulley when the machine is
in operation.
6) If a belt cover, finger guard, eye guard are installed, do not operate the machine without these safety
devices.
2" Precautions before starting operation:
I) Never operate the machine before filling the machine's oil pan.
2) When a new sewing machine is first turned on, verify the rotational direction of the pulley with the power
on.
3) Verify the voltage and phase (single orthree) with those given on the machine nameplate.
3" Precautions for operating conditions:
1) Avoid using the machine at abnormally high temperatlrres (35·C or higher) or low temperatlrres (5·C or
lower) .
2) Avoid using the machine in dusty conditions.
-3-

4, Specifications:
~
Specifications GC0388-D GC0388
Material weight Heavy
Max. sewing speed 2,000
rpm
Stitch length
0-8.0mm
Needle bar stroke 38.0mm
~eadtake-upJeverstroke
73.0mm
Alternating movement 2.0-5.0mm
Walking foot alternate Dial
operating system
Feed dog height 1.0mm
Needle DPX
17 22#
Presser
By hand 6.0mm
foot stroke
By knee 16.0 mm
Fully rotating Fully rotating
Hook
automatic lubrication
(for thread
trimmer),
automatic
lubrication,
Large Large
c--
-
Lubrication system Automatic
Thread trimmer 0 X
Touch back
0
5, Power cable connection:
I) Connection to power supply:
Each connector(plug) should be completely set in
the corresponding receptacle of the control box afler
checking
the connector shape and mating direction.
( I )
When a three-phase motor is used, connect "U" phase to the red lead, "V" phase to the white lead,
phase to the black lead. Motor rotation direction depends on the internal switch setting in the control box.
Insulating tape I
CD
® (wrap 2 - 3 turns) I
Bare wire
I
Insulating
tape (wrap
2- 3 turns)
Lamp leads
Lamp leads
Fig.1 Fig.2.
-4-

Note: The green wire must be connected to the ground terminal in order to properly ground the
motor.
e 2) The appropriate power fuse capacity is as follows:
Three-phase power source:
200~240V : lOA
Single-phase power source: IOO-120V: 15A
2) Lamp leads
(
1) When installing a 'work lamp (6V, IS-20W), remove the insulation from the leads at the back of the
control box, strip the wire and connect them appropriately insulating the connections using insulating tape.
Note: The I)ower switch must be turned off before connecting the lamp.
(2) When a work lamp is not used, the lamp lead ends must be insulated as shown in Fig.(1) or Fig.(2) so
that the two leads
do not shortcircuit. If this is not done, the transformer in the control box will be bwned.
Note: The work lamp must not be connected in parallel to any heater, such 8!Nl foot warmer.
3) Direction of rotation
To change motor rotation direction, remove the rubber cap (see Fig. 3) at the bottom left of the motor front
coyer and push the internal direction selector switch.
Rotation direction has been set
to countercloch.'Wise as seen from the motor pulley before shipment.
Routing the maching cords
Round hole in table
15mm
(load of abOUl 1 kg)
Fig.4
6
.. Connection of control box (Fig.3):
The control box should be connected as shown Fig,3,
Note:
( 1) Be sure to turn the power switch off before connecting or disconnecting the connectors.
(2) The combination of t.he machine heads with the motor control panels are specified below. Use
special care to ensure the correct combination when replacing the machine head
or motor control panel.
Machine head model Control box model
GC0388-D XC-AM-AI020
XC-AM-B2020
Fig.3
-5-

lSI mark
7" Installing the belt (Fig.4):
1) Use a V-belt for sewing machine use, type M.
2) To adjust the belt tension, change the motor height by turning the tension adjust nuts so that the belt
sinks about I5nun when depressed by hand at the center ofthe belt span.
If the tension
is too low, the speed may not be consistent in the low or medium range, or the needle may
not stop
in the proper position. If the tension is too high, the motor bearings will deteriorate more rapidly.
8" Adjustment of needle bar stop position(Fig5, Fig6, Fig7):
1) Adjustment of "UP" position
When the pedal is kicked down by heel to cut the thread, the machine stops in the
"UP" position. If the
marks deviate more than 3mm, adjust
as follows:
(
1) Disconnect the plug (12 pins) fr0rr. the control panel;
(
2) Run the machine and stop in the "UP" position;
(3) While holding the pulley, insert the adjusting tool into the two holes marked "A", then rotate the pulley.
2) Adjustment of "DOWN" position
When the pedal
is returned to the neutral position, the machine stops in the "DOWN" position. If the
marks deviate more than 3mm, adjust as follows:
( 1) Disconnect the plug (12 pins) from the control panel:
(
2) Run the machine and stop in the "DOWN" position;
(3) While holding the pulley, insert the adjusting tool into the two holes marked "B", then rotate the pulley.
3) Confirm the stop operation then the plug (12 pins) coming from the machine head into the receptacle.
3rd mark
I lS~-~-:;-~Whill~;; .. up.:--~.
~ ._ pOSIl~.~._~,
, 3rd mar~ Black "Down" .
I. ~ po~tlon ..
Fig.5 Fig.6
(a~
Mark (BLACK)
.," .:
" Fig.7
-6-

9... Installing the knee lifter (Fig.8) :
1) Pull out the knee lifter shafts (on the right and left) as far as possible, and properly set them.
2) Install the drive arm on each shaft.
3) Set a link between the right and left drive arms to COlmect them.
4) Install the knee lifter lever on the left drive ann.
Knee lifter lever
Link
Shoulder screw
Fig.8
10 ... Lubrication (Fig.9):
Pour oil up to position" A" of the oil tank.
Dming operation, check the oil level periodically, and in cases where the oil level is below position "B",
replenish the oil supply up
to position "A".
Use white spindle oil.
Oil check window
Knee lift pin
Fig.1
11... Condition of oil lubrication (Fig.lO):
While operating the machine, check the condition of oil lubrication through the oil check window.
/A\ f6\.B
\._oj \Dj
Oil removing screw
Fig.9
-7-

12 .. Adjustment of the hook lubrication (Fig.H):
Adjustment can be done by turning screw "A".
( 1) When the screw has been fully tightened Maximum
(3) When the screw has been fully loosened Maximmn
Note; After adjustment of this screw, the machine should be operated for at least 30 seconds, then
check the oil mist from the hook.
18\
Decrease Increase
Fig.H
By-pass hole
Fig.12
13 ... Adjustment of oil pnmp (00 12):
The standard adjustment is as follows:
The adjusting plate keeps the bypass hole fully closed. To decrease splashing, open the bypass hole
appropriately.
14 ... Periodical cleaning (Fig. 13, Fig.14, Fig.15):
Clean the feed dog, hook and oil pump periodically.
Maintenance ofmoter: Remove dust from the motor filter every one or two months.
Control box: Remove dust from the connector.
'--,
Hool<
Feed dog base
Fig.13 Fig.lSFig.14
-8-

15 ... Handling instructions (Motor and control box) (Fig.16):
I) Keep your feet away from the pedal when turning
the power on or off.
2) Always turn the power offwhen leaving your seat.
3) The brakes may fail if the power is switched off
or power failure occurs during operation of the sewing
machine.
4) The control box cover must be kept closed during
machine operation to prevent misfunction caused by
the entry of dirt.
5) The control circuitry must not be checked with a
multimeter to protect the semiconductor parts from voltage.
6) The power switch must be turned offbefore tilting
the machine head or touching the needle.
7) The three-phase motor must be grounded using RUbber plug
,grOuIldwire (GREEN). The single-phase motor must
~ot be wired to a starburst connection.
8) When manipulating the switch in the control box, first turn off the power switch, then open the front cover
(Fig.16). If you have to open the bottom cover, wait for 10 minutes after the power switch has been turned off,
slnce a high voltage is applied inside the box. (This is vital to discharge the built-in capacitors).
9) Use the motor away from high noise sources such as high-frequency welders.
10) A suitable capacity is l5A for a single-phase, and lOA for three-phase motor respectively.
11) The detector uses an optical detecting element. Do not allow dirt, dust., oil etc., to attach to the detecting
plate when the machine pulley has been removed for adjustment. If dirty, gently wipe it off while avoiding
scratching the plate. Also, care should be taken to avoid oil soaking into the crevices ill the plate.
16... Installation of belt cover:
Be sure to install the belt cover for safety.
Fig.16
-9-

17", How to wind the lower thread (Fig.I7):
Strength of winding; Particularly in the case of nylon or polyester thread, wind the bobbin loosely.
Uneven winding:
If the bobbin is wound unevenly, slide the thread guide toward the less wound portion of
bobbin.
Winding amount:
When the bobbin is wound excessively, loosen the adjusting screw. When the bobbin is
WOlUld insufficiently, tighten the adjusting screw.
Even Winding with
an amount
4/5 of
fully
ca pacity
o
~.
I
Winding .mount
adlusting screw
Fig.I7
18", How to attach a needle (Fig.I8):.
Note: Before attach the needle, be sure to turn the power switch off.
Note:
If thread snapping occurs during reverse sewing with polyester, it may be avoided by fitting
the needle with the long groove shifted to the front side. Normally, avoid fitting the needle with the groove
facing
backward.
Insert the needle until It bottoms, and InsuffiCient
insertion
Wrong direction
tighten the screw keeping the long
groove in
the needle facing to the left:
=-;:- Gap
O~
.Q
Long groove ~o
faCing to the '.:
x x
left
-----.L _ _' _ L_
~:=-$=
Fig.!
- 10-

19" How to route the upper thread (Fig.19):
Raise the thread take-up lever to its highest possible position, and route the upper thread in the order
illustrated below.
(.:..""\
,'/
®
®
Left right
., - Thread
Thread
guide
Thread take-up spring
Upper thread guide
Fig.19
20" Adjustment of stitch length and reverse sewing (Fig.20):
l) To change the stitch length, rotate the stitch length adjusting dial while pressing the "push" lever.
2) Pressing the stitch length adjusting lever for reverse stitching.
Stitch length
adjusting dial
Fig.20
Push button
2L Adjusting the thread tension (Fig.21):
o x
d ;
43
-o:3it:;
AJiwell balanced
~II~
stitch The
upper thread is too tight or
lower thread IS too loosp.
x
2:::~.
The upper thread IS too loose
or lower threarl is too tiQht Fig.21
-11-

22" Upper thread tension (Fig.22):
1) The upper thread can be adjusted based on the lower thread tension.
2) Adjustment can be done by rotating the thread tellBion nut.
For special fabric sewing with special thread, the desired tension can be obtained by adjusting the strength
and operating range of thread take-up spring.
Thread tension spring
• Thread
tension nut
~(~
Fig.22 Fig.23
23" Lower thread tension (Fig.23):
Lower thread tension can be adjusted by rotating sere"v "A".
24" Adjustment of presser pressure (Fig.24):
1) Pressure should be adjusted according to the material to be sewn.
2) Pressure on both the walking foot and the presser foot can be adjusted.
3) Sewing pressure should be adjusted to the minimum required strength.
i~
20mm
Fig.24
- 12-

25 .. Feed dog height (Fig.25):
I) Feed dog should be l.Omm higher than the throat plate.
2) To adjust the dog height as follows:
(l) Loosen the screw "A", move the feed bar upward and downward.
(2) When adjustment is completed, tighten the screw "A".
Eccentric shaft
Throat plate I .Omm
Feed
lifting prong
\
~~
Feed dog
@
Fig.25 Fig.26
26, Adjustment of feed dog inclination (Fig.26):
Ifnecessary, adjust the inclination according to the material to be sewn as follows:
Position of mark on the
eccentric shaft Feed dog
~-
Horizontal M!'Nibb Standard
8)' Up
~
Front up
(MAX.)
e). Down
~ Frontdown
(MAX.)
l) Looscn thc screw "A".
~) Rotate the eccentric shaft clockwise or cowlterclockwise \ovith screw driver.
3) Tighten the scrc,\" " • ,-
27" Adjustment of stitch length and fOlWard/backward sewing (Fig.27):
l) Loosen the set screws locatcd in the bracket.
2) Rotatc the stitch length adjusting pin until the desired length is
reached as follows:
(
1) Clockwise: Increases thc stitch length in forward sewing, and
decreases the stitch length in backward sewing.
(2) COWlterclockwise: Decreases the stitch length in forward sewing,
and increases the stitch length
in backward sewing.
Stitch Length
@ Bracket adjusting pin
Fig.27
-13-

28" Presser bar lifter (Fig.28):
Rotate the presser bar lifter in the direction of the arrow.
'This raises the presser foot.
Presser bar litter
Fig.28
29
.. Adjustment of walking foot and presser foot:
I) Adjustment of alternating movement ,Fig29):
(
I) The alternating movement on the walking foot and presser foot can be adjusted by using adjusting dial
located on the top cover.
(2) Face the desired number printed on the dial to the matching mark located on the top cover. The number
printed on the dial represents the possible protrusion of the walking foot and presser foot from the throat plate
when the alternating movements on these are evenly set.
(3) The alternating movements can be readjusted up to 2.0-5.0mm.
2) To change the balance of the alternating movements bem-'een the walking foot and presser foot (Fig.30):
Presser foot
Upper feert litllng rock
shaft crank
Rubber plug
Alternating
movement
/' adjusting
/ dial
Matching mark
d~
I \1--1rJ ~ -~
II, 1---------
. /
Fig.29 Fig.30
( I) To increase the rise of the walking foot and decrease the rise of the presser foot:
CD Remove the rubber plug of top covcr.
® Rotate the pulley until the presser foot is slightly raised from the throat plate.
® Loosen screw "A" (on the right side)
0) The built-in spring pulls down the presser foot until it makes contact with the throat plate. Tighten
thc screw "A".
@) After this adjustmcllt, the protrusion or the presser foot has bcen decreased by a set distance. And
the vertical motion of the walking foot has been increased by the same distance.
- 14-

(2) As a contrary case (1) , to decrease the rise of the walking foot and increase the rise of presser foot as
follows:
Fist, rotate
the puJley until the walking foot is slightly raised from the throat plate. Next, loosen screw "A".
Finally, tighten screw "A". Tlus decreases the rise of the walking foot.
3) Installing the feed regulator bracket (Fig.31):
Note: If the feed regulator bracket is poorly positioned, the resultant alternating movements may be
too sbort
or long, causing defective machine operation.
. ,.--------------------,
( 1) Set the clearance between special screw" A"
located on the regulator stud and the side wall of the
machine arm to 26.5m.m as
Fig.3!.
(2) With the feed regulator stud held as explained
is step
(I) above, adjust the feed regulator bracket.
This adjustment should insure a clearance
of l2rnm
between the periphery of pin "B" located on the feed \
regulator bracket and the top
cover mounting face
located on the ann. Tighten
screw "C".
®
Feed regulator bracket
©
IZmm
(~)
\
4) Feed pitch adjustment of walking foot (Fig.32):
The ratio of the upper feed amount (of the walking foot)
to the lower feed amount (of the feed dog) has been adjusted
to 1: I. However, the walking foot feeding amount can be
increased or decreased depending on the operating conditions.
Loosen the nut located on tlle upper feed rock shaft
crank (left), and shift to adjust the position
of the pivot
bracket upward or downward.
Upper position->-Feed pitch->-Small
Lower position
->- Feed pitch--- Large
Fig.3!
____ Upper feed rock shaft
crank (Lell)
Nut
Fig.32
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30... Adjustment of feed timing (Fig.33):
I) The standard position of the eccentric
feed cam and eccentric feed lifting cam are
illustrated to Fig.33
2) Open the top cover,properly slide the
eccentric ring to adjust the position.
3) eccentric feed cam can also be adjusted
by removing the rubber plug located on the
top cover. In the latter case, however, the
built-in bevel gear is concealed; care should
be taken when adjusting.
1Sl screw Upper shaft
Upper eccentric feed Bevel gear for Eccentric
lifting cam upper shaft
feed cam
Top cover Rubber
plug
Fig.33
31... Adjustment of thread trimmer mechanism:
1) The thread trimmer mechanism illustrated as Fig.34.
' Thread
trimmer solenoid 'lIi!iJ
Twist spring L
------_ .. _------
I F~ed blade bracket un'll
~------_.- .\
l.~l~base unit J Collar
\
Thread guide Thread trimmer
\
~II !I
cam . _
\ I I
f---=--/
Fixed blade
/Twist spring
Movable knife Ifeftl Knife driving
//
crank // \
'\ Stopper
Cam follower
Cam follower
Drive lever StDpper plate
crank (11
crank (2)
Fig.34
- 16-

.---
Coil spring
~~ \ Cam follower
crank 1
\
Cam follower crank 2
I
~_ 8? .5mm
--_._---
.. _
\
\
Knife driving
shaft
"'-"
Stopper
J1
2) Relation between the fixed blade and movable knife (left) edge:
(I) The standard position is illustrated as Fig.35.
(2) The distance between the fixed blade and movable knife is O.3mm.
(3) The correct position of fixed blade bracket or fixed blade can be adjusted according to Fig.35.
®
1
O.3mm Movable knife (left)
r (knife edge) o
Fixed blade
bracket unit
o
Fixed blade
o
Fig.35
3) Knife driving shaft:
( I) The standard position is illustrated as Fig.36.
(2) When assembling, the knife driving shaft must first be put through the drive arm.
(3) Cam follower crank 1 must be positioned as illustrated to the right, and secured on the recess located on
the
knife driving shaft.
(4) The stopper must be secured on the recess in such a way that the knife driving shaft is snug and
smoothly rotates in the shaft direction.
Fig.36
4) Installing the thread trimmer solenoid unit (Fig.37):
( 1) Operation stroke of the thread trimmer solenoid:
a. Standard operation stroke is 6.0mm.
b. This stroke can be adjusted by using nut "A".
(2) Installing the unit:
a. The unit can be mounted by using screws ., B" and "C".
b. Clearance of l.Omm must be insured between the dri:ving lever and cam follower crank 2 with
stopper
l1ut "A" made contact with solenoid.
c. In such a situation, activating the solenoid should create a clearance of O.5mm between cam
- 17-

follower crank I and 2. This situation is standard. To meet this standard, slide the solenoid mounting
bracket in the direction of the arrow as illustrated, if adjustment is needed.
6 mm
®@
Fig.37
O.5mm
5) Installing the thread trimming cam (Fig.38)
e I) Face the 2nd timing mark "A" (GREEN) located on the pulley to the matching mark on the arm.
e 2) With the thread trimmer solenoid activated, rotate the thread trimmer cam forward until the caUl makes
contact with the roller. Then, secure the cam.
e 3) With the thread trimmer solenoid deactivated, allow the cam follower crank 2 to return to its original
position. This should create a clearance of O.5mm-I.Omm between the cam and roller end .This distance is
standard. I Matching
mark
A
~
Thread
trimmer
cam cam
O.5-1.0mm
Hook O. 6mm
shaf~ 1
ROller~
\Q/
follwer crank 2~~/~
Knife driving shaft
Fig.38
- 18

6) Adjustment of knife engagement (Fig.39):
(l) Position of movable knife (left) and fixed blade:
See the Fig.39, the standard distances from the needle center are 7.5mm and 5mm from the movable knife
(left) and fixed blade respectively.
(2) Adjustment of knife engagement:
With the solenoid activated, turn on the machine. This rotates the thread trimming cam which rotates the
movable knife (left). When the movable knife (left) has
moved to its farthest distance, the standard engagement of I 1 Fixed blade
the blade is 1.5mm-2.0mm. The engagement can be adjusted
by properly mounting the drive arm.
(3) Adjustment of knife engagement pressure:
a. If a thread is poorly cut, particularly when it is thick,
slightly increase the engaging pressure. This should solve the
problem.
b. The engaging pressure can be adjusted in this way: I Knife driving crank
Loosen lock nut "B" and adjust it by using adjusting screw "A",
1.5-2.0mm
Fixed blade
Movable knife (left)
Movable knife lleft)
Fixed blade
Fig.39
-19-