kansai wx-8800 series Owner's manual

Industrial Sewing Machines
WX-8800 SERIES
TECHNICAL
INSTRUCTION MANUAL
fj) MORIMOTO MFG. CO., LTD.
From the library of: Superior Sewing Machine & Supply LLC

Tables of Contents
1. Looper Needle Timing
Page 1
1-1 The looper and the looper carrier
1-2 Looper-Needle synchronization
1-3 Looper-Needle distance
1-4 Needle height
1-5 Looper-Needle clearance
1-6 Adjustment of the looper avoid angle
1.7 Needle deflection
2. The Needle Guards
2-1 Position of the rear needle guard
2-2 Position of the front needle guard
3. The Top Cover Looper
8
3-1 Position of the top cover looper
3-2 Position of the top cover thread guide
3-3 Top cover looper timing
4. Feed Dogs and Stitch Length
12
4-1 Feed dog height and level
4-2 Adjustment of the stitch length
4-3 Adjustment of the differential feeding
5. Presser Foot Adjustments
15
5-1 Position of the foot
5-2 Presser foot lift height
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6. Stitching Adjustments
6-1 Position of the silicone tank eyelet
6-2 Adjustment of the needle thread take up 16
6-3 Needle thread take up control 17
6-4 Needle thread take up wire
6-5 Thread nipper location 18
6-6 Cover thread take up and take up eyelet 19
6-7 Position of the looper thread take up eyelets
6-8 Looper thread take up cam 21
6-9 Height of the guide plate
7. The Timing Belt
22
7-1 Timing belt markings
7-2 Changing the timing belt
8. Lubrication System
25
8-1 Placing the oil in the machine
8-2 Oil flow rate
9. The Tabletop
26
9-1 Tabletop cutout design specification 26
9-2 Mounting the machine
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Thank you for purchasing a KANSAI SPECIAL WX SERIES MACHINE.
This instruction manual is a technical service manual featuring specific information regarding the
adjustments and settings of the machine.
1. LooperfNeedle Timing
he Looper And The Looper Carrier
The shaft of the looper is set into the top of the looper carrier ("A", Fig 1) and fastened in place
with the set screw ("B", Fig 1). The height and the position of the looper are automatically set as
long as the looper is set fully into the looper carrier and the set screw is tightened squarely onto
the flat on the looper shaft.
By design, the inner surface of the looper is offset three degrees away from the horizontal plane
(see Fig 2).
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Looper-Needle Synchronization
The timing (synchronization) of the looper and
needles are equal for the leftwards movement as for
the return movement. As the looper moves to the left,
behind the needles: As the tip of the looper reaches
the center of left needle, the dimension from the tip of
the looper to the top of the eye of the left needle must
be 1 to 1.5mm (see Fig 3A). As the looper returns to
the right, in front of the needles: As the tip of the
looper reaches the center of the left needle, the
dimension from the tip of the looper to the top of the
eye of the left needle must be 1 to 1.5mm (Fig 3B).
Adjustment of the looper-needle timing is done by
removing the top housing cover, loosening the set
screwsCA") on the top timing pulley, and moving the
position of the timing pulley on the top shaft
accordingly (see Fig 4).
Looper-Needle Distance
At the time the needles are in their lowest position,
the looper is in its rightmost position. At this time,
the distance from the tip of the looper to the center of
the middle needle (needle bar center) must be 6.5mm
(Fig 5). This dimension is standard for all gauge sizes.
Because it is common practice to measure the looper-
needle distance from the tip of the looper to the
center of the right needle (Fig 6), corresponding
looper-needle distances for various gauge sizes are
shown on chart 1.
Fig 3A
Fig 3B
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Chart 1
Gauge width
"A"
1/8" (3.2mm)
4.9mm
5/32"(4.0mm)
4.5mm
3/16"(4.8mm) 4.1mm
7/32"(5.6mm)
3.7mm
1/4" (6.4mm)
3.3mm
Needle Height
As the looper moves to the left, behind the needles,
the tip of the looper reaches the center of the left
needle. At this time, the distance from the tip of
the looper to the top of the eye of the needle must
be 1 to 1.5mm (Fig 7). If the needle height needs
adjusting, remove the face plate to gain access to
the clamp screw ("A", Fig 8). Loosen the clamp
screw by using A 3mm hex key wrench. Adjust the
height up or down as needed. Retighten the clamp
screw.
Note
1. Do not overtighten the screw more than 3 to 4 ft.
lbs. (30 to 35 kgcm) torque.
2. When tightening the clamp screw, be sure the
needles are in alignment with the needle holes in
the needle plate (Fig 9).
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(^^^^Looper-Needle Clearance
As the looper moves to the left, behind the needles,
the tip of the looper will lightly brush against the
right needle (zero clearance). As it continues
across and passes behind the left needle, the
clearance will be 0.1 to 0.15mm. The same
conditions apply to both two and three needle
models (see Fig 10 and 11).
To make an adjustment, first check to see that the
needles are in proper alignment with the needle
holes in the needle plate (Fig 9). Next, check to be
sure the looper is set so that the set screw is
positioned squarely on the flat of the looper shaft
(see Fig 1). Next, check to be sure that the looper
avoid angle is appropriate (see section 1-6).
Three Needle Gauge
Two Needle Gauge
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Adjustment Of Looper Avoid Angle
The looper avoid motion, or path, has a
standard offset angle such that the tip of the
looper just brushes the back surface of the right
needle and has a clearance of 0.1 to 0.15mm as
it passes behind the left needle, (see Fig 12).
In the WX series of machines, the looper avoid
angle is adjustable for obtaining improved
results under various sewing conditions.
To adjust, loosen the set screw ("B", Fig 13) on
the avoid eccentric ("A", Fig 13), and move the
eccentric forward or backward on the shaft as
needed. Moving the timing mark forward (in
the "X" direction. Fig 14) decreases the avoid
angle. Moving the timing mark backward (in
the "Y" direction. Fig 14) increases the avoid
angle. Standard looper avoid angle is achieved
when the timing marks are aligned.
Caution
The adjustment of the looper avoid angle is
intended for slight variations only. Large
variations in looper avoid angles in either
direction may result in skip stitching.
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Needle Deflection
As the needles move downward and the looper
moves to the right, the left needle must contact
the back of the looper 3 to S.Snim behind the eye
of the needle (see Fig 15). The left needle must
deflect off the back 1/3 of the looper, appro
ximately 0.3 to 0.6mm (see Fig 16).
If heavier needles are used, the looper position
may need to be adjusted. Loosen the nut on the
stop pin for the looper avoid rod (Fig 17).
Reposition
the looper by turning the screw ("A",
Fig 17). By turning the screw clockwise, the
assembly will move in the "X" direction (see
Fig 18). This will decrease the looper avoid
motion. By turning the screw counterclockwise,
the assembly will move in the "Y" direction.
This will increase the looper avoid motion. The
standard amount of looper avoid motion should
be 2.3 to 3.1mm.
By decreasing the looper avoid motion, needle
breakage may occur because of too much
contact between the looper and needles and
increased friction. By increasing the looper
avoid motion, skip stitching may occur.
3~3.5mm
0.3'^0.6mm
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2. The Niedle Guards
Imposition Of The Rear Needle Guard
At the time the needles are in the lowest
position, the height of the rear needle guard
must be arranged so that the contacting edge
("a", Fig 19) lines up with the eye of the right
needle (see Fig 19). Also at that time, the
clearance and orientation to the needles must
be such that there is a 0.3 to 0.4mm clearance to
the right needle and a 0.6 to 0.7mm clearance to
the left needle (see Fig 19). Adjust by loosening
screws "B" and "C" (Fig 22) and position as
needed. Retighten all screws.
As the looper moves to the left and the tip of the
looper reaches the center of the right needle (see
Fig 20), the needle guard must be contacting the
right needle to make a "zero clearance" (0 to 0.
05mm) between the looper tip and the scarf of
the right needle (see Fig 20).
As the looper continues across and the tip of the
looper reaches the center of the left needle,
there should be a clearance of 0.15 to 0.2mm
between the left needle and the rear needle
guard (see Fig 21).
At this time, the rear needle guard does not
contact the needles.
All adjustments to height and position orien
tation are done with screws "B" and "C" shown
in figure 22.
Fig 20
Fig 22
0—0.05mm
0.1~0.15mm
0.15—02mm
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