Siruba P717K User manual

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The specification and/orappearances of the equipmentdescribed in this instruction book and parts
list are subjectto changebecause of modification without previous notice. ODM14P30.JUNE.2013
P717K/P727K
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INSTRUCTION BOOK&
PARTS LIST
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From the library of: Superior Sewing Machine & Supply LLC

INSTRUCTION MANUAL FOR POST -BED INDUSTRIAL SEWING MACHINE
This manual is prepared to permit the sewing machine to be used efficiently and for highest performance.
This machine is post-bed industrial
sewing machine suitable for sewing shoes, bags, caps and general
leather works. You can either select !-needle or 2-needle machine according to your type of works.
Being equipped with spring return reverse lever type feed mechanism opener type vertical hook, and slide
type thread take-up provides perfect uniformed stitching.
-INDEX-
Specification···...·········...·········...······...·········...·········...······...·········...·········...······...·..······...···2
Mainparts name of machine head···...···...···...···...···...···...···...···...···...···...···...···...···...···...···...3
I .Preparation for installation of machine ........................................................................... 4
1). Place of installation of machine .................................................................................... 4
2). How to mount the machine head ·················································································4
3). How to mount the motor"··························· ....... ···················· ............ ··············· ··--······4
4). How to connect the motor lever and foot pedaJ ............................................................ 4
5). How to mount the bobbin winder assembly.. ························································· .......... 4
6). How to mount and adjust the knee lifter mechanism ................................................... 5
7). How to mount the oil pan··························································································· ..6
8). How to mount the vibration preventing rubber············....... ·········································· ··6
!!. Preparation for operation···························································································· ·7
1). Selection of thread································································································7
2). How to attach the needle·······················································································7
3). How to lead the upper thread..···············································································8
4). How to wind the lower thread on the bobbin.. ··•·······•····•····•·······•··· .. ························9
5). How to adjust the bobbin winder assembly.. ··························································· ··10
6). How to place the bobbin into the book.. ·································································· ·11
ill. How to operate······································································································13
1 ). Starting to sewing······························································································· ·13
2). Sewing over····································································································· ····13
IV. Stitching adjustment·············································· .. ···.. ·········································· ·14
1). Adjustment of stitch length·················································································14
2). Forward and Reverse stitching······.. ·························· .. ··········································14
3). Adjustment of thread tension ··············································································14
4). Adjustment of feed dog height and pressure of presser on matcrials ........................ 17
5). Proper timing between the hook and needle... ·················································· .... 18
6). Proper timing between the hook and opener..····•··•···•··••··•······•······•··••······•··•···•····21
7). Proper timing between the feed dog and needle..···••···••····•·········••·· ..... ··•·····•····•· ·22
V. Cleaning and Lubrication·· ........................................................................................ 23
1). Cleaning············································································································23
2). Lubrication··.. ··········································· .. ··········································· .. ···········23
3). Grease·················································· ...... ······•·•·•·······•·•·•······••···•···· ...... ····· ·····24
P1
From the library of: Superior Sewing Machine & Supply LLC

P2
*Specification and main parts name of machine head.
•sPECIFICATION
Sewingmaterials •..· •• Shoes,Bags,Caps,and leather
works.
Speed · ................... ·3000 RPM.
Need1e······· .............. Dp x5(135 x 5)
Needle bar stroke ...... 33.4mm(1-5/16")
Thread take up • ........ Slide type
Stitch length ............ 0-5mm(0-3/16")
Presser bar stroke···· .. 8mm(5/16")
Presser foot ............ 1-Needle ...... Roller foot
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
(11)
(12)
(13)
1-Needle(l/16'')Rollerfoot
2-Needle(1/4")Usual foot
Spool pin
Oil reservoir(right)
Balance
wheel
Stitchregulating dial
Reverselever
Post
Hook post holder
Hook post cover plate(back)
Hook shaftbracket
Slide plate
Needle plate
Rollerfoot
Thread guide( needle bar)
Hook ............... ··...... .... Vertical hook with opener
Stitchlength adjustment ··· Dial regulator type
Reverse stitching............ Spring return manual tacker
Postheight ........... • ... · ..... 178mm(7")
Lubrication ................. • Manual oiling,providedwith
towoil reservoir
at arm
Oil circulation · ·· ··· ... · .... · Auto maticcapillarycation
withoilwicks
Knee
mechanism............ Lever system
Thble ........................... "DN" type
Motor ........................... Clutchmotor(400W)
(14)
Needle bar
(15) Thread guide(needle bar bushing)
{16)
Presser bar
(17)
Faceplate
{18) Thread tension regulator
(19) Thread guide( arm)
(20) Thread take up lever guard
(21) Presser regulating thumb screw
(22)
Thread take up lever
{23)
Thread retainer
(24) Oilreservoir(left)
(25) Pre-tension
UCtiOn
*Main parts name of machinehead
(Two Needle Type)
(1) Spool pin (9) Hook shaft bracket (17) Face plate
(2) Oilreservoir(right) (10) Slide plate
(18)
Thread tension regulator
(3)
Balancewheel (11)
Needle plate (19) Thread guide( upper)
(4) Stitch regulating dial (12) Rollerfoot
(20) Thread take up lever guard
(5) Reverse lever (13)
Needle guide (21) Presser regulating thumb screw
(6) Post (14) Presser
bar
(22)
Thread take up lever
(7)
Hook postcoverplate(lower) (15)
Thread guide(lower) (23) Oil reservoir(left)
(8) Hook postcoverplate(upper) {16)
Thread controller disc (24)
Pre-tension
P3
From the library of: Superior Sewing Machine & Supply LLC

P4
* Preparation for installation of machine head
I PREPARATION FOR INSTAUATlON OF
MACHINE HEAD
1. PlACE OF INSTAllATION OF MACHINE.
The machine shoule be installed on well-
leveled floor in order to ensure smoothoperat-
ing of your machine at high speed without
vibration.
2. HOW TO MOUNT 1HE MACHINE HEAD
ON 1U 1HE TABLE.
Instal the hinge with screws, provided in
accessory,at hole
on the back of the bed and
hook to the hinge plate of the table, then the
headis set on thetable.
3. MOUNTING OF THE MOTOR
+The motor is mounted generally with bolts,
nuts,and washers as provided.
+Setthe position so that the motor pulley and
balance wheel grooves are aligned straight as
shown in Fig. For proper operation when the
belt
is inserted.
+Then connect power supply cord and motor .
cord extened from switch.
4. HOW TO CONNECT THE MOTOR lEVER
AND FOOT PEDAL.
+The angle of the slope of the pedal can be
important,
It can make a difference in the
strength necessary
to press thepedal.
+There might bea slight difference in operator's
posture,but generally30°
-40° angel as shown
in Fig.(A) is considered best.
+ The treadle position shown in Fig.(B) will be
difficult.
In this case,adjust the length of the
connecting rod to suit the operator.
5. HOW TO MOUNT 1HE BOBBIN WINDE
ASSEMBLY.
+Set the position of the bobbinwinder assembly
provided
in accessory, to be in parallelwith the
belt hole
of the table, with the lever pushed in
operationposition.
+When bobbin winder pulley will come in contact
with the belt, fix the assembly onto the table
with two screws provided, as shown in Fig.
Hinge plate Hinge
Motor pulley
Balancewheel
0
(A)
x (B)~
UCtiOn
*Preparation for installation of machine head
6. HOW TO MOUNf AND ADJUST 1HE
KNEE LIFTER MECHANISM.
+ The knee lifter mechanism is employed to
raise and lower the presser bar.
+ Mount it properly onto the table by following
method for easy operation.
+ If improperly installed, the operating action
will be heavy and tire theoperator.
1) Place of mounting.
+ Make a hole for knee lifter shatf bracket
Wldemeath
the table according to Fig. Shown.
2) How to mount.
(1) Mount the knee lifter. Shaft bracket while
the side
of hole for spring towards your side
as shown inFig.
(2)
The other side of the knee lifter shaft
bracket is screwed so as able to insert the
(3) On the knee lifter shaft, mount the knee
lifter positionbracket,regulating rod bracket,
knee plate bar bracket, and spring in the
order mentioned, then tighten respectively.
(4)
Mount the kneelifter shaft, on which fixed
respective parts,
on the shaftbracket.
(5) After checking
up allthe parts and inclina-
tion
of the knee lifter shaft, tighten the
shaft bracketscrews.
(
6) The shorter side ofknee plate bar is mounted
on the bar bracket, and longer side of the
bar
is mounted on the knee plate.
(7) The end of spring is inserted into a hole of
the
shaft bracket(front).
(8) The other end of spring is placed on the
knee plate bar moving it.
(9) After mounting
all these parts, check
whether the knee lifter mechanism can be
operated lightly.
'Thble top plate
Centerline of knee liftershaft
Shaftbracket(front)
I Shaftbracket(back)
I Knee lifter P~tion bracket
Knee plate
bar bracket
Rod bracket
Knee plate Kneelifter shaft
P5
From the library of: Superior Sewing Machine & Supply LLC

P6
*Preparation for installation of machine head
3) Adjustment.
(1) Place of knee lifter position bracket.
Since the position bracket makes standardize
the starting point of knee plate, tighten the
screw at the proper position so that the
stopper of position bracket come contact
with top underneath of the shaft bracket
(back).
(2) Positon of the knee lifter bell crank regulat-
ing rod and its bracket.
+ The regulating rod makes raise and down the
presser foot by means of moving the bell
crank lever up and down.
+ While the presser foot downed, adjust the
length (A) loosening the regulating rod
screw so that the rod and crank lever
contacts with as shown in Fig.
7. HOW TO MOUNT TilE OIL PAN.
Fit the oil pan with mails into the hole bored in
the table so as not to come into contact with
the knee lifter mechanism.
8. HOW TO MOUNT 1HE VIBRATION
PREVENTING RUBBER.
The vibration preventing rubber is used to
prevent the machine from vibrating and there-
by provide smooth operation of the maching.
Fit these rubber insulators properly at the
four comers of the table as shown in Fig .
Remember, the machine will vibrate if these
are not monnted properly.
(1) Hollow out four comers of the table 20mm
radius and 13mm depth to fit the rubber
insulators.
* Be sure to give smooth surface to ".A:'
where hollow out is made.
(2) Nail the VIbration preventing rubbers down
at the four comers.
Knee lifter bell cranklever
Knee lifterregulating rod
Nail
II . PREPARATION FOR OPERATION.
1. SELECTION OF THREAD.
+ For best results, use high quality machine
thread.
+ For upper thread useleft-twist thread.
+ To check whether a thread is left-twist or
right-twist, hold the thread as shown is Fig.
and twist the thread held in
the right hand
toward your side.
If the thread twistbecomes
loose, the thread is right-twist, and if the
thread twist becomes tight the thread is left-
twist.
2. HOW TO ATTACH THE NEEDLE.
+ Dpx5(135x5) type needle is recommendable
for general use.
+ But select the needle size that meets the
requirements of the meterialssewn and the
thread used.
For One Needle Type
(1) While the presser barlifter is raised, turn
the balance wheel by hand to raise the
needle
bar to its highest position.
(2) Move therollerfoot
to theleft as shown in
Fig.
(3) Loosen the needle clampingscrew.
(4)Hold
the needle to its sidewith the long
groove side(left). Theninsert theneedle as
deeply it will go into the needle clamping
hole.
(5) Securely tighten the needleclamping screw.
For Two Needle Type
(1) While the presser bar lifter is raised, turn
the balance wheel by handto raise the needle
bar to its highest position.
(2) Move theroller foot to the leftas shown in
Fig.
(3) Loosen
the needle clamping screw.
(4)
Hold the needles so that the two needles
side with
the long grooved (faces each
other), and insert it as deeply as it will go
into the needle clampingholes.
(5) Securely tighten the needle clamping screw.
UCtiOn
*Preparation for operation
"'-..
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P7
From the library of: Superior Sewing Machine & Supply LLC