artisan 1798-1 AZ User manual

Direct Drive Heavy Duty Top And Bottom Feed
Lockstitch Sewing Machine
1798-1 AZ
Instruction Manual
Parts Catalog
artisan Sewing Supplies, LLC San Francisco, CA USA 94103
artisan

----- CONTENTS -----
INSTRUCTION MANUAL
1. PRECAUTIONS BEFORE STARTING OPERATION ········································································1
2. SPECIFICATIONS······································································································································1
3. PREPARATION AND LUBRICATION···································································································2
4. PREPARETION BEFORE START TO OPERATE···············································································3
5. HOW TO USE THE MACHINE···············································································································4
6. THREADING···············································································································································4
7. SET STITCH LENGTHAND REVERSE FEEDING···········································································5
8. POSITION PRESSER BAR·······················································································································5
9. ADJUST THE PRESSURE OF PRESSER EOOT·················································································6
10. ADJUST THREAD TAKE-UPSPRING··································································································6
11. ADJUSTTHREAD GUIDEAND THREAD TENSION·······································································7
12. HOWTO WIND THE IOWER THREAD ON THE BOBBIN····························································8
13. TIME NEEDLE TO ROTAING HOOK ··································································································9
14. REPLACE ROTATING HOOK··············································································································10
15. ADJUST OPENINGTIME OFTHE TENSION DISCS·····································································10
16. ADJUST THE HEIGHT OF FEED DOG······························································································10
17. ADJUSTMENT OF FEED DOG INCLINATION················································································11
18. TIME FEED MOTION TO NEEDLE MOTION·················································································11
19. PERIODICALCLEANING·····················································································································12
PARTS CATALOG
A) ARM BED AND IT'S ACCESSORIES·····································································································13
B) NEEDLE BAR AND TAKE-UP LEVER & ARM SHAFT MECHANISM········································16
C) STITCH REGULATOR MECHANISM··································································································19
D) FEEDINGAND FEED LIFTING MECHANISM··················································································21
E) PRESSER FOOT MECHANISM··············································································································23
F) PRESSER LIFTING & FEEDING MECHANISM················································································25
G) OIL LUBRICATION MECHANISM········································································································28
H) MOTOR MECHANISM·····························································································································30
I) ACCESSORIES············································································································································32

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1. PRECAUTIONS BEFORE STARTING OPERATION
1) Safety precautions
(1) When turning 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 off when the machine is not used,.
(3) The power must be turned off before tilting the machine head, installing or adjusting the machine, or
when replacing.
(4) Avoid placing fingers, hairs bars etc. nears the pulley, bobbin winder pulley, when the machine is
operation. Injury could result.
(5) Do not insert fingers into the thread take-up cover, under/round the needle, or pulley when the
machine is in operation.
(6) If a mini motor cover, finger guard, and/or eye guard are installed, do not operate the machine
without these safety devices.
2) Precaution before Starting Operation
(1) If the machine's oil pan has an oil sump, never operate the machine before filling it.
(2) If the machine is lubricated by drop oil, never operate the machine before lubricating.
(3) When a new sewing machine is first turned on, verify the rotational direction of the pulley with the
power on. (The pulley should rotate counterclockwise when viewed from the pulley.)
(4) Verify the voltage and (single or three) phase with those given on the machine nameplate.
3) Precaution for Operating Conditions
(1) Avoid using the machine at abnormally high temperature (35℃or higher) or low temperatures (5℃
or lower). Otherwise, machine failure may result.
(2) Avoid using the machine in dusty conditions.
2. SPECIFICATIONS
Material weight 1798-1 AZ
Max. speed 2000rpm
Stitch length 0 to 10mm
Needle bar stroke 35mm
Presser foot
clearance
Hand Lifter 6 mm
Knee lifter 13 mm
Needle type DP×17 #18~#22
Rotating hook Auto lubricated large hook for trimmer
Lubrication Auto lubricated
Motor 220V550W Servo motor

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3. PREPARATION AND LUBRICATION
1) Cleaning the machine
Before leaving the factory, the machine parts are coated with rust-preventive grease, which may be
hardened and contaminated by dust during storage and shipment. This grease must be removed with gasoline.
2) Examination
Though every machine is confirmed by strict inspection and test before leaving the factory, the machine
parts may be loose or deformed after long distance transportation with jolt. A thorough examination must be
performed after cleaning the machine. Turn the balance wheel to see if there is running obstruction, parts
collision, uneven resistance or abnormal noise. If these exist, adjustment must be made accordingly before run-in
operation.
3) Oiling
(1) Required amount of oil. Line (A) on the oil reservoir:
Max. oil level. Line (B) on the oil reservoir: Min. oil level.
If oil level goes down under line (B), oil cannot be
distributed to each part of the machine, thus causing the
parts a seizure.
(2) Replenishing
Always use only No.18 special machine oil for high
speed sewing. Be sure to replenish oil to Line (A) before
starting operation.
(3) Replacing oil
To replace oil, remove Screw (C) to drain oil. After completely draining off oil, clean the oil reservoir and
securely tighten Screw (C), then fill the reservoir with fresh oil.
4) Run-in operation
Run-in operation is required for a new sewing machine, or a sewing machine left out operation for a
considerable length of time.
(1) Remove Red Rubber Plugs (A) on the top of the arm
and replenish sufficient amount of oil.
(2) Lift Presser Foot (B).
(3) Run the machine at a low speed (1000-1500spm) to
check oil distributing condition through Oil Check Window
(C).
(4) Perform run-in operation at 1000-1500spm for
30minutes. After a lapse of one month of service during
which the working speed is increased gradually and the machine runs sufficiently well, the high speed 2000spm

—3—
can be adopted according to the nature of the work.
5) Adjusting the lubrication of rotating hook
The lubrication of the rotating hook can be adjusted by Oil Adjusting Screw (A) as follows:
1) Turn Oil Adjusting Screw (A) clockwise to increase oil and turn Oil Adjusting Screw (A) counterclockwise to
decrease oil.
2) Oil Adjusting Screw (A) adjusts oil amount
within 5 turns. When Oil Adjusting Screw (A) is fully
tightened, oil amount is maximum.
3) Readjustment depends on temperature, sewing speed
and the like. In practice, oil amount can be judged as
follows: remove the throat plate and place a piece of
paper on instead, run the machine for about 20 seconds,
then check the oil splashed on the paper.
4.PREPARETION BEFORE START TO OPERATE
Adjustment of needle bar stop position Adjust of "UP" position
When the pedal is kicked down by heel, the machine stops at "UP" position. If the marks deviate larger than
3mm adjust as follows.
Release the set screw (1) of the magnet positioned piece, adjust the position of magnet positioning piece, until
the machine stops in the needle up position (the marker (A) and the marker point of motor cover to
coincide), then tighten the screw (1).

—4—
5. HOW TO USE THE MACHINE
How to attach needle
Note: Before making the following adjustment, be
sure to switch off the power source.
Insert the needle up to the bottom of needle clamp
and tighten the screw keeping the long groove
side of needle forward the left．
Note: if snapping of thread occurs during back
Sewing with polyester threads，it may be avoided
by fitting the needle with the long groove Shifted
to the front side．
6. THREADING
Raise the thread take-up lever to its highest position and thread the upper thread in the following order.
When draw the bobbin thread, hold the end of the needle thread and turn the balance wheel. Needle bar to the
lowest position and then lift it to its highest position. Pull the needle thread and the bobbin thread is drawn up.
Put the ends of needle thread and bobbin thread front ward under presser foot.

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7. SET STITCH LENGTH &REVERSE FEEDING & Stitch compensation
1) Stitch length can be set by turning Dial (A).The
figures on Face (B) of dial show stitch length in mm.
2)Reverse feeding starts when Reverse Feed Lever (C)
is depressed, and the machine will feed forward again
if Reverse Feed lever (C) is released.
3) Stitch compensation switch
When the Stitch compensation button is pressed
lightly during sewing, Stitch compensation sewing can
be done.
When the button is released, Stitch compensation
sewing is end.
8. POSITION PRESSER BAR
1) Loosen lock Nut (E) and Pressure Regulating Thumb Screw (A).
2) Remove rubber plug from Face Plate (B).
3) Loosen Screw (C) and adjust the position of Presser Bar (D) till
the presser foot is 6 mm above the throat plate, the presser foot
lifted to its highest.
4) Tighten Screw (C) and put in the rubber plug.
5) Tighten pressure Regulating Thumb Screw (A) and Lock Nut (E).

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9. ADJUST THE PRESSURE OF PRESSER EOOT
Pressure of presser foot is to be adjusted in
accordance with thickness of materials to be sewn.
First loosen Lock Nut (A). For heavy materials, turn
the pressure regulating thumb screw as shown in Fig.10
(a) to increase the pressure, while for light materials, turn
the pressure regulating thumb screw as shown in Fig.10
(b) to decrease the pressure. Then tighten Lock Nut (A).
The pressure of presser foot is recommended to be
less as long as normal feeding is ensured.
10. ADJUST THREAD TAKE-UP SPRING
1）Adjusting the thread take-up spring tension
Loosen Set Screw (A), turn Tension Stud (B) clockwise
to increase the spring tension, or turn the stud
counter-clockwise to decrease the spring tension. After the
adjustment, be sure to tighten Set Screw (A). The thread
take-up spring tension should be about 30g. To attain this.
First loosen Set Screw (A), turn Tension Stud (B)
counter-clockwise to decrease the tension of Thread Take-up
Spring (C) to zero, then turn Tension Stud (B) clockwise
until Spring (C) comes to the notch of thread tension
regulating bushing, and again turn Tension Stud (B) halfway
back (counterclockwise) After the adjustment. Tighten Set
Screw (A).
2）Adjusting the thread take-up spring stroke
Loosen Set Screw (B), turn Stud (C) clockwise to
increase the stroke or turn Stud (C) counter-clockwise to
decrease the stroke. After the adjustment, tighten Set Screw
(B).
Before leaving the factory, the thread take-up spring
has properly been adjusted. Readjustment is needed only in
the case of special material or special thread.

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11. ADJUST THREAD GUIDE AND THREAD TENSION
1) Adjusting of the thread guide
1 2 3
Thread guide position
Left Middle Light
Materials Heavy Medium Light
Refer to the table above, and adjust according to the stitching conditions, the material and thread
2) Adjusting of thread tension
3) Adjusting of upper thread tension
(1) Upper thread tension can be adjusted by thread
tension nut.
(2) Upper thread is to be adjusted according to the
lower thread tension.
(3) 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.
4) Adjusting of lower thread tension
(1) Lower thread tension can be adjusted by
the screw (A).

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(2) The thread tension can be checked as the following.
Hold the end of pulled out thread and if the bobbin case
fall slowly, the tension is proper.
12. HOW TO WIND THE IOWER THREAD ON THE BOBBIN
1) Press the bobbin onto the thread winding shaft.
2) Pass the thread for winding thread as shown in the
figure, and wind the end of the thread clockwise around
the bobbin several times, then wind the thread on the
thread adjuster side counter-clock wise several times.
3) Press lever ①in the direction of the arrow, and start
the sewing machine.
4) The operation will automatically stop when winding is
completed.
5) Adjustment of thread winding strength
Adjust with the thread adjuster nut ②.
6) Adjustment of thread winding amount
Adjust by loosening screw ③and moving the
adjustment plate ④