KANSAI SPECIAL DVK1702B User manual

INSTRUCTION
Industrial Sewing Machines
DVK1702B
DVK1702P,PMD
DVK1702BK,PBK
DVK1701EHD
DVK1702EHD
DVK1702MLH
Second edition : March 2001
No. 010012

INTRODUCTION
Thank you for your purchasing Kansai Special's DVK Series.
Read and study this instruction manual carefully before beginning any of the
procedures and save it for later use.
1. This instruction manual describes adjustments and maintenance procedures on this
machine.
2. Before starting the machine, check to make sure the pulley cover, safety cover, etc.
are secured.
3. Before adjusting, cleaning, threading the machine or replacing the needle, be sure to
turn off the power.
4. Never start the machine with no oil in the reservoir.
5. Refer to the parts list as well as this instruction manual before perfoming preventive
maintenance.
6. The contents described in this instruction manual are subject to change without
notice.
Indication of serial number
Zip code
Model
0 4 0 0 0 0 1
Serial number
The date of manufacture

CONTENTS
1. NEEDLES & THREADING THE MACHINE
1-1 Needles ····················································1
1-2 Replacing the needle ··································1
1-3 Threading the machine ······························1
2. MACHINE SPEED
2-1 Machine speed & direction in which the machine
pulley runs ··············································2
2-2 Motor & belt ·············································2
3. LUBRICATION
3-1 Oil ···························································3
3-2 Oiling ······················································3
3-3 Replacing the oil and the filter element ········3
4. SEWING MACHINE INSTALLATION
4-1 Cutting the machine table ··························4
4-2 Installing the machine ·······························5
5. TIMING OF THE LOOPER TO THE NEEDLES
5-1 Angle and height for installing the looper ·····5
5-2 Looper left-to-right movement ·····················6
5-3 Looper setting distance ······························6
5-4 Needle height ···········································6
5-5 Needle/looper front-to-back relationship ·······7
6. ADJUSTING THE NEEDLE GUARDS
6-1 Position of the needle guard (rear) ···············7
6-2 Position of the needle guard (front) ··············8
7. ADJUSTING THE FEED DOG & STITCH LENGTH
7-1 Feed dog height & tilt ································8
7-2 Stitch length ·············································8
8. ADJUSTING THE PRESSER FOOT
8-1 Presser foot pressure ·································9
8-2 Position of the presser foot & foot lift ············9
9. ADJUSTING THE STITCH FORMATION
9-1 Position of the thread support ··················· 10
9-2 Position of the looper thread eyelets ··········· 10
9-3 Position of the looper thread take-up ·········· 10
10. ADJUSTING THE REAR PULLER DEVICE
10-1 Manual lever ·········································11
10-2 To adjust the puller pressure ···················11
10-3 Adjusting the feeding amount of the rear
puller ··················································11
11. ADJUSTING THE FRONT PULLER DEVICE
11-1 To insert elastic and adjust the feeding amount
of the front puller ··································11
12. ADJUSTINGTHEBKAUXILIARYFEEDINGDEVICE
12-1 Auxiliary feed dog height & tilt ················12
12-2 Installing the auxiliary presser foot ··········12
13. ADJUSTING THE BK FRONT KNIFE DEVICE
13-1 Adjusting the clearance between the left and
right knives ··········································13
13-2 Disassembling/reassembling the lower
knives ··················································13
13-3 Disassembling/reassembling the upper
knives ··················································14
13-4 Overlap of the upper and lower knives ······14
13-5 Resharpening the lower knives ················14
14. CLEANING THE MACHINE ···················14

【1】NEEDLES & THREADING THE MACHINE
1-1 Needles
UY128GAS of Schmetz or Organ
Select the proper needle for the fabric and thread.
< Needles and needle size > Except 1701，1702EHD
Schmetz Nm75 Nm80 Nm90 Nm100 Nm110
Organ #11 #12 #14 #16 #18
■1701EHD･････DR2 Nm200，#25
■1702EHD･････UY143GS Nm200，#25
1-2 Replacing the needle
When replace the needle, check the needle carefully to see
that the scarf is turned to the rear of the machine (see the
illustration). Then install the needle correctly.
< Note >
Before replacing the needle, be sure to turn off the machine.
A clutch motor continues running for a while after the machine is turned off.
Therefore keep on pressing the pedal until the machine stops.
1-3 Threading the machine
Thread the machine correctly by referring to the illustration below.
Threading the machine incorrectly may cause skip stitching, thread breakage and/or
uneven stitch formation.
A，B ... Needle threads
C .....… Looper thread
1

【2】MACHINE SPEED
2-1 Machine speed & direction in which the machine pulley runs
Refer to the table below for maximum and standard
speeds of the Series. To extend machine life, run
the machine approximately 15-20% below the
maximum speed for the first 200 hours of operation
(approx. 1 month). Then run the machine at the
standard speed. The machine pulley turns
counterclockwise as seen from the end of the
machine pulley.
2-2 Motor & belt
Motor : 3-phase，2-pole，400W clutch motor
Belt : M type V belt
Select the proper motor pulley according to the
machine speed (refer to the motor pulley outer
diameter on the table below). Adjust where to
position the motor by pressing the finger onto the
middle of the belt so that 1~2cm deflection can be
obtained (see the illustration on the right).
< Machine speed >
Type Maximum speed Standard speed
P，PMD，B 4500SPM 4000SPM
BK，EHD，MLH 4000SPM 3500SPM
< Motor pulley selection table >
Machine speed (SPM)Motor pulley
outer diameter
(mm) 50Hz 60Hz
70 2900 3450
80 3300 3900
90 3700 4400
100 4100 (4900)
110 4500
2

【3】LUBRICATION
3-1 Oil
Use Kansai Special’s genuine oil.
(Part No. 28-611)
3-2 Oiling
■To fill the machine with oil
Remove oil plug A from the oil hole.
Fill the machine with oil until the oil level is at the
top line (see H in the illustration) on oil gauge C.
After the first lubrication, add oil so that the oil
level will be between H and L.
■To check for proper oil flow
After filling the machine with oil, run the machine
to check the oil is splashing from oil pipe outlet B.
3-3 Replacing the oil and the filter element
To extend machine life, be sure to replace the oil
after the first 250 hours of operation.
To replace the oil, follow the procedures below.
1. Remove the V belt from the motor pulley and
then remove the machine from the table.
2. Remove screw D and then drain the oil.
Be careful not to stain V belt with the oil.
3. After draining the oil, be sure to tighten screw
D.
4. Fill the machine with oil by referring to 3-2
shown above.
If filter element E is contaminated, proper oiling may not be performed.
Clean the filter element every six months. If just a little or no oil flows out from the
nozzle with the proper amount of oil in the machine, check the filter element.
To clean the filter element, remove oil reservoir.
3

【4】SEWING MACHINE INSTALLATION
4-1 Cutting the machine table
4

4-2 Installing the machine
Install the brackets on the underside of the table board (see the illustration below).
Fit the rubber cushions onto the brackets.
Mount the machine head on the rubber cushions.
【5】TIMING OF THE LOOPER TO THE NEEDLES
5-1 Angle and height for installing the looper
To obtain the proper angle and height, insert the
looper fully into looper holder A and then tighten
screw B. The proper angle for the looper on P，
PMD，B，BK is 3°. Distance at 25mm from the
point of the looper between the bottom of the looper
blade and the extension line from the point of the
looper : Approximately 1.3mm.
The proper angle for the looper on MLH is 3.5°.
Distance at 20mm from the point of the looper
between the bottom of the looper blade and the
extension line from the point of the looper:
Approximately 1.2mm. The proper angle for the looper on EHD is 0°.
5

5-2 Looper left-to-right movement
When the point of the looper moves from the right/left
to the left/right, distance A from the top of the left
needle's eye to the point of the looper at the left side of
the left needle should be equal (see the illustration on
the right). To make this adjustment, remove the
machine cover, loosen three screws C on looper
eccentric B and then shift looper eccentric B by
turning the machine pulley while holding looper
eccentric B.
5-3 Looper setting distance
When the looper is at the extreme right end of its
travel, adjust distance A from the point of the looper
to the right side of the right needle. This distance
varies by model and/or gauge size (see the table below).
Adjustment is made by loosening screw B.
Model (gauge size) Setting distance
A (mm)
P，PMD，MLH (1/8，5/32) 5.2
P，PMD，(3/16，7/32，1/4) 4.4
B，BK，PBK 4.0
EHD 5.0
5-4 Needle height
When the point of the looper has reached the left side
of the left needle with the machine pulley turned in
the operating direction, adjust distance a from the top
of the left needle's eye to the point of the looper on the
back side of the needle. This distance varies by
model and/or gauge size (see the table below).
The adjustment is that raise needle bar up or down by
remove rubber caps A and loosen the screw C.
Model A (mm)
P，PMD，MLH 1.2~1.5
B，BK，PBK 0~0.5
EHD 2~2.5
< Note >
After the above adjustment is made, install the needle
plate and then check to make sure each needle drops
correctly into the center of the each needle drop hole.
6

5-5 Needle/looper front-to-back relationship
When the looper passes on the back side of the needle,
the clearance between the right needle and the looper
should be 0~0.05mm. Adjustment is made by
loosening screw A. The clearance between the left
needle and the looper should be 0.2mm.
Adjustment is made by loosening screw B on the looper
avoid eccentric. To increase the clearance, turn the
looper avoid eccentric toward the back side of the
machine. To decrease the clearance, turn the looper
avoid eccentric toward the front side of the machine.
【6】ADJUSTING THE NEEDLE GUARDS
6-1 Position of the needle guard (rear)
■Movable type (for models except BK，PBK)
When the point of the looper has reached the center of
the right needle, the distance from the point of the
right needle to line (a) on needle guard A should be
1mm (approximately 2mm on EHD).
Then the clearance between the needle and the needle
guard should be 0mm.
Adjustment is made by loosening screw B and turning
screw C to move the needle guard up or down and/or
front or back as required.
■Fixed type (for BK，PBK)
When the needle bar is at the bottom of its stroke, the
distance from the point of the right needle to line (d)
on needle guard D should be approximately 3mm.
Then the clearance between the needle and the needle
guard should be 0mm.
Adjustment is made by loosening screws E.
7

6-2 Position of the needle guard (front)
When the point of the looper has reached the center of the
right needle, the center of the right needle's eye should be
aligned with line A on the needle guard (front).
In addition, the left and right needles should be parallel
with the needle guard (front).
Adjustment is made by loosening screw B.
The clearance between the needles and the needle guard
(front) should be 0.2~0.5mm.
Adjustment is made by loosening screw C.
【7】ADJUSTING THE FEED DOG & STITCH LENGTH
7-1 Feed dog height & tilt
■Height adjustment
The feed dog is at the top of its stroke, the feed dog teeth
should be 1.0~1.2mm (1.5mm on EHD) above the top
surface of the needle plate.
Adjustment is made by loosening screw A.
■Tilt adjustment
When the feed dog is at the top of its stroke, the feed dog
teeth should be parallel with the top surface of the needle
plate. Adjustment is made by loosening screw B and
turning screw C.
7-2 Stitch length
Loosen bolt A (left-hand thread) with a 9.5mm T-wrench.
Then turn screw B. To increase the stitch length, turn
screw B counterclockwise.
To decrease the stitch length, turn screw B clockwise.
8

【8】ADJUSTING THE PRESSER FOOT
8-1 Presser foot pressure
The presser foot pressure should be as light as
possible, yet be sufficient to feed the fabric and
produce uniform stitches.
To increase the presser foot pressure, turn the
adjusting knob clockwise.
8-2 Position of the presser foot & foot lift
Fit the presser foot onto the presser bar so that the
needle can drop correctly to the center of the presser
foot needle drop hole.
■Position of the presser foot
Loosen screw A. Adjust by moving the presser foot
left or right while checking to make sure the needle
drops correctly to the center of the presser foot
needle drop hole.
■Foot lift
The presser foot should be 8~10mm above the top
surface of the needle plate.
Set stopper B at the required position.
Fasten the presser foot lift lever with nut C so that
the lever cannot be lowered.
9

【9】ADJUSTING THE STITCH FORMATION
9-1 Position of the thread support
When the needle bar is at the bottom of its stroke,
the centers of the eyes on thread eyelet A should be
level with the top surface of thread support B, and
A should be parallel with B.
Height adjustment of thread support B is made by
loosening screw C and moving thread support B up
or down. Moving thread support B up tightens the
needle thread. Moving thread support B down
loosens the needle thread.
9-2 Position of the looper thread eyelets
Align the eyes on looper thread eyelets A with the
center of the shaft. Adjust the position of the eyes
on looper thread eyelets A by loosening screws B
according to the sewing conditions such as the
fabric and/or thread to be used.
To increase the amount of the looper thread to be
supplied, move looper thread eyelets A toward the
rear side of the machine.
To decrease the amount of the looper thread to be
supplied, move looper thread eyelets A toward the
front side of the machine.
Thread guide C should be 6~7mm above the top
surface of the guide plate.
Adjustment is made by loosening screw D.
9-3 Position of the looper thread take-up
When the point of the needle has reached bottom
surface A of the looper blade while the looper is
moving to the right from the extreme left end of its
travel, the looper thread should be removed from
point C on looper thread take-up B.
Adjustment is made by loosening and then
tightening screw D.
10

【10】ADJUSTING THE REAR PULLER DEVICE
10-1 Manual lever
To position or remove the fabric, raise manual lever A.
10-2 To adjust the puller pressure
The puller pressure should be as light as possible, yet
be sufficient to feed the fabric smoothly.
To increase the pressure, turn adjusting knob D
clockwise. To decrease the pressure, turn adjusting
knob D counterclockwise.
10-3 Adjusting the feeding amount of the rear puller
Adjust the feeding amount of the rear puller according
to that of the feed dog.
To increase the amount, loosen nut G and move it to
the left. To decrease the amount, move it to the right.
【11】ADJUSTING THE FRONT PULLER DEVICE
11-1 To insert elastic and adjust the feeding amount of the front puller
Insert elastic by opening/closing small roller C with
lever A (see the illustration).
Adjust the feeding amount of the front puller according
to that of the feed dog.
To decrease the amount, loosen screw B and move it
up. To increase the move it down.
11

【12】ADJUSTING THE BK AUXILIARY FEEDING DEVICE
12-1 Auxiliary feed dog height & tilt
■Height adjustment
When auxiliary feed dog A is at the top of its stroke,
the auxiliary feed dog teeth should be 1.5mm above
the top surface of auxiliary feed dog plate B.
Adjustment is made by loosening screw C.
■Tilt adjustment
When auxiliary feed dog A is at the top of its stroke,
auxiliary feed dog A should be parallel with auxiliary feed dog plate B.
Adjustment is made by loosening screw D and turning screw E.
12-2 Installing the auxiliary presser foot
Install the auxiliary presser foot on the presser bar
with spring A pressed down to approximately 10mm.
Then tighten screw B.
Position collar C so that there is a clearance of 2mm
between collar C and guide plate D.
Then tighten screw E.
12

【13】ADJUSTING THE BK FRONT KNIFE DEVICE
13-1 Adjusting the clearance between the left and right knives
Clearance A should be divided into half by the center line of the needle bar.
■To make the above adjustment
1. Loosen the upper (left and right) knives by loosening screws B and C.
2. To adjust the clearance between the lower left and right knives, loosen screws D and
E.
3. Fit lower knife (left and right) holders F and G onto guide plates H.
Tighten screws D and E.
4. Fit upper knife (right) P onto the lower knife (right). Then tighten screw C.
5. Fit upper knife (left) O onto the lower knife (left). Move upper joint bracket I to the
right to press spring J. Then tighten screws B while pressing them to the flat spot.
13-2 Disassembling/reassembling the lower knives
■To disassemble the lower knives
1. Loosen screws B.
Move upper knife joint bracket I to the left so
that the spring can be released.
2. Remove the lower knives by removing screws
K.
■To reassemble the lower knives
1. Install lower knives L on knife holder F or G
with the point of each cutting edge turned
outside.
2. Adjust lower knives L so that each cutting edge
of lower knives L is flush with the top surface of
auxiliary feed dog plate. Then tighten screws
K.
3. Move upper joint bracket I to the right to press
spring J. Then tighten screws B while
pressing them to the flat spot.
13

13-3 Disassembling/reassembling the upper knives
14
■To disassemble the upper knives
1. Loosen screws B.
Move upper knife joint bracket I to the left so
that the spring can be released.
2. Loosen screws N. Remove upper knives O and
P by moving them up.
■To reassemble the upper knives
1. Insert the upper knives to the proper depth
along the guides on upper knife brackets Q and
R. Then tighten screws N.
2. Move upper joint bracket I to the right to press
spring J. Then tighten screws B while
pressing them to the flat spot.
13-4 Overlap of the upper and lower knives
When upper knives O and P are at the bottom of
their stroke, there should be a clearance of 0.5mm
between the points of the cutting edges of the upper
knives and those of the lower knives.
Adjustment is made by loosening screw T on upper
knife drive lever S.
13-5 Resharpening the lower knives
Resharpen the lower knives when they become dull.
It is recommended spare upper and lower knives
are always kept for replacement.
【14】CLEANING THE MACHINE
At the end of each day, remove the presser foot
and the needle plate and then clean the slots of
the needle plate and the area around the feed
dogs.