Siruba DL7200C Automatic Plain Sewing Machine Instruction Manual

INSTRUCTIONS BOOK
DL7200C Series

DL7200C Automatic Plain Sewing Machine

The content of this instruction book is for the models: DL7200C-BM1-XX /DL7200C-BI-11-XX
Explanation of Dangerous Level

Dangerous| Don’t ignore the warning sign and don’t proceed incorrect operation. Or it will cause the person or the third party seriously injured or dead during maintenance.
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Caution| Ignoring this warning sign and proceed incorrect operation will cause  the person involved or the third party wounded and equipment damaged during maintenance.

Explanation of Warning Signs and Labels

GENERAL SAFETY INSTRUCTIONS

Warning!
When using this machine, basic safety precautions should always be tollowed to reduce the risk of fire. electric shock and personal injury, including the followings.
Read all these instructions before operating this product and save these instructions.

1. Keep work area clean
   Cluttered areas and benches invite  injuries.

2.  Consider work area environment
   Do nol expose power to rain. Do nol use machine tools in damp or wet locations Keep work area well lit.
   Do not use power tools where there is risk to cause any fire or explosion.

3. Guard against electric shock
   Avoid body contact with earthed or grounded surfaces (e.g Pipes, radiators. ranges retrigerators.)

4. Keep children away
   Do not let visitors touch the tool or extension code.

5. Dress properly
   Do not wear loose clothing or jewelry, they can be caught in moving parts. Wear protecting hair covering to contain lang hair.

6. Do not abuse the cord
   Never carry the machine by cord or yank it to disconnect it from the socket. Keep the cord away from heat, oil, and sharp edges.

7. Maintain machine with care
   Follow instructions for lubrication and changing accessories. Inspect tool cord periodically. If damaged, have it repaired by an authorized service facility.

8. Disconnect machine
   When notin use, before servicing and when changing accessories.

9. Avoid unintentional starting
   Do not carry a plug-in tool with a finger on the switch. Ensure the power switch is off when plugging in.

10. Check damaged parts
    Before further use of the tool, a guard or other part that is damaged should be carefully checked to determine that it will operate properly and perform its intended function.

11. Warning
    The use of any accessory or attachment, otherthan those recommended in this instruction manual, may present a risk of personal injury.

12. Have your tool repaired by a qualified person
    Repairs should only be carried out by qualified persons using original spare parts.

SPECIAL WARNING FOR ELECTRIC CONNECTION!

1. Incorporate this machine only with “CE” certificate hald-to-run control device.
2. Follow the instruction manual device to install control device.
3. Always earth machine appropriately during operation.
4. Before adjustment, parts change or servicing must be sure to pull out the plug from socket to prevent the hazard of unintentionally start of machine.

IMPORTANT SAFETY INSTRUCTIONS

Far operating safely and getting the best functions of this machine, you must operate it correctly. Please read and follow the instructions of this manual, and keep it at hand for future references. We are confident that you will enjoy this machine as much as we enjoy manufacturing it.

1. Instead of the following instructions. when you use this machine, please Pay attention to the basic safety measures.
2. Before using this machine, please tead this manual and all related instructions. In addition, please keep this manual for future needs.
3. Betore using this machine, please ascertain that it conforms with safety standards and regulations of your country.
4. When the machine is ready for Operation, all the safety equipments must be ready. Operate this machine without the specified safety devices is not allowed.
5. This machine must be operated by a properly trained operator.
6. For your own satety, we suggest you wearing goggles.
7. Please turn off the power switch or disconnect it for any one of the circumstances of the followings :
8. When threading needle(s), adjusting thread Take-up(s), thread guide(s), and/or replacing bobbin(s).
9. When replacing needles, presser feet, needle plates, feed dogs, needle guards, horns, cloth guides and other parts or accessories,
10. When repairing,
11. When the operator leaves the working place or leaves the machine unattended.
12. If clutch motors without brake pads are used, must wait until the motor stops completely.
13. If grease, oil, of any fluid contacts your skin or eyes by any chance, please wash the contacted area completely with clean water and consult a doctor. Or, swallow any fluid mistakenly, consult a doctor immediately.
14. Donottouch any functioning parts and devices. Always attend to whether power switch is on or off beiore operating in order to prevent anyone from getting hurts.
15. Qualified technicians are required for adjustment, modification, and tepair. Only use assigned parts for replacement.
16. Routine maintenance and service must be performed by well trained persons , or qualified technicians.
17. Maintain and check the electronic parts must be done by qualified electrician or well-trained persons. If any electronic part damaged or malfunctioned, stop the machine immediately.
18. The air hose has to be detached from the machine and the compressor or air supply has to be cut off before repairing and servicing the machine equipped with pneumatic parts such as an air cylinder. Qualified technicians or well-trained persons are  equired tor adjustment and repairs.
19. Toensure the best performance, periodically clean the machine is necessary.
20. In order to operate properly and to reduce the noise, please place the machine flat and level on the ground. Avoid operating the sewing machine at a noisy surrounding.
21. Select a proper power plug and install it by an electrician. Please connect the power plug toa grounded receptacle.
22. This machine can only be used for the designed purpose. Other uses of this machine are not allowed.
23. Any modification or conversion made on this machine must be conformed with the safety standards and regulations. Precautionis necessary. No responsibility will our company take for damages caused by any modification or conversion of this machine without permission.
24. Two safety warning signs are applied as warning signs:
    (1) For the satety of operators and service persons, please don’t open the cover of any electronic control boxes of motor or other devices and don’t tauch any components inside to avoid electrical shock hazards.
    (2) Always keep in mind:
    a. Please never operate this machine without belt cover, finger guard or any safety device to avoid physical injury.
    b. Please keep your hair, fingers and cloths away from the hand wheel, V belt and motor while the machine is in operation, as well as never put anything near these parts, to prevent the risk of injuries by tangled into them.
    c. Please never put your fingers under the needle(s) or in the thread take-up cover to prevent physical injuries when you turn on the power switch or operate the machine.
    d. While the machine is in operation, the hook rotates at ahigh speed. Please keep your hands away from the area of hook to prevent any potential injury to your hands.
    In addition, please make sure to turn off the power of the machine while changing bobbins.
    e. Be careful and do not place your fingers inside the machine when placing or lifting the machine head to avoid possible physical injuries.
    f. Please turn off the power before tilting the machine head or removing the belt cover and the V belt to avoid possible accidents due to abrupt start of this machine.
    g. For machines equipped servo motors, the motors do not produce noise while the machines are at rest.
    Therefore, please turn off the power of this machine to avoid possible accidents due to abrupt start of the machine.
    h. Never operate the sewing machine after the ground wire is removed to avoid electrical shock hazards.
    i. Please turn the power switch off before connecting or disconnecting the power plug to prevent possible accidents due to electric shock or damaged electronic components.

WARNING
Please confirm the followings to avoid malfunction or damage to this machine.

1. After installing the machine, and before the first operation, please clean it completely.
2. Clean all dust and overflowed oil during transportation.
3. Confirm that the voltage and the phase (single or 3 phase) of motor are set correctly.
4. Confirm that the power plug is correctly connected to the power supply.
5. Never use the machine when the local voltage type is different from the marked voltage on the nametag attached on the machine.
6. Confirm that the rotating direction of the machine pulley is correct.

Warning:
Betore doing any operation or any adjustment described later in this manual, please turn the power off to prevent accidents caused by abrupt start of the sewing machine.
WARNING TAG

• The following warning tags will be attached on the sewing machine. (Fig. 1, Fig. 2)
• When using the sewing machine, please follow the instructions of the tags. Please contact the dealer if any of the tags is fallen off or fuzzy.

Must have ground wire.
A loosen or a did not connect well ground wire is the reason causing electronic shock or malfunction.
Indicates rotating direction.
Safety Protection Device (Fig. 3)
(A) Finger Protector

SAFETY ILLUSTRATION OF NEEDLE GUARD

The presser foot protection device is as shown as the figure 4. For safety of all operators, this device is restricted to disassemble.

MOVING THE SEWING MACHINE

1. The machine should be carried by two people as shown in the figure.
2. Hold the motor cover A by hand, so that the pulley will not rotate.
3. Please wear a pair of skidproof shoes while moving the sewing machine. (Fig. 5)

THE INSTALLATION POSITION OF THE SEWING MACHINE

1. Please do not install the sewing machine near the equipments, such as Television, Radio, or Wireless Telephone. Or these equipments will experience electronic interference. (Fig. 6)
2. The wire should insert to the AC power socket directly. If using the extension wire, this might cause malfunction.

NAMES OF MAJOR PARTS

1. Thread Guide
2. Presser Foot
3. Oil Windows
4. Thread Tension Adjusting Set| 5. Thread Stand
6. Safety Protection Devices
7. Thread Take-up Cover
8. Finger Guard
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SPECIFICATIONS

Specifications of machine category

1. Description of the machine name1. represents the type of the machine:
   L= High Speed One-needle Bottom
   2. Feed Lockstitch Machine
   represents the improved machine appearances
   3. B: Rotary trimming system
   4. Purposes: (Table 1, Table 2)| Application| r.p.m
   Max Sewing Speed| (mm)
   Max Stitch Length
   ---|---|---|---
   M| For medium-weight materials| Max : 4000| 0~4
   H| For medium to heavy-weight materials| Max : 4000| 0~5

Table 1****

(mm)
Needle Bar Stroke| (mm) Presser Foot Lift| Needle
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By hand lifter| By knee lifter
M| 30.7| 5.5| 13 Max : 13
10 Normal : 10| DBX1 #11-14
H| 35| DBX1 #20-23

Table 2
5. Code of the hook:
1: High Speed Hook
2 : 2-capacity Large Hook
3 : Oil-Free Hook
4 : Special Hook, Vertical Type
6. None: Four teeth rows of the needle plate and the feed dog
A: Three teeth rows of the needle plate and the feed dog
7. Code of operation box:
0: SIRUBA normal model without key type operation box
1 : SIRUBA advanced model with key type operation box
8. Function code of the operation box (Table 3):

Code of the operation
box & its functions| Function Code| Automatically Thread
Trimming| Rapidly Backstitch| Thread Wiping| Auto Presser Foot Lifting| Electronic
Gripper
---|---|---|---|---|---|---
Suitable for SIRUBA advanced model with
operation box (1)| 0| | |

_

|

_

|

_

1| | | |

_

|

_

2| | |

_

| |

_

3| | | | |

_

5| | |

_

|

_

|
6| | |

_

| |
2. Specification: (Table 4)
Model| DL7200C
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Materials| Medium-weight| Heavy-weight
1| (r.p.m.) Sewing speed| Max: 4500
Normal: 4000| Max: 4000
Normal: 3500
2| Stitch length| 0-4| 0-5
3| (mm) Needle bar stroke| 31.| 35
4| Needle| DBX1 #11-14| DBX1 #20-23
5| (kgs) Presser foot pressure| 5-7| 5-7
6| Presser lifter| Knee-drive| 10 mm ( 13 mm) Standard: 10 mm (Max.: 13 mm)
Hand-drive| 5.5 mm
7| Presser foot| Adjustable presser foot
8| Feed dog| 3 teeth rows or 4 teeth rows
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feed dog slope is adjustable
g| (mm) Presser foot height| M 0.9~1 .1| H 1 .0~1 .2
10| Feeding| Up/down and front/rear rocking bottom feeding
11| Thread take-up lever| Connecting rod
12| (mm)
Thread take-( up lever stroke| 59.2+1| 59.5+1
13| Lubrication| Fully automatic lubricating
14| Oil recycle| Pillar plug pump
15| Lubricant| Provided specified lubricant
16| Thread wiping device| (Optional Device)
17| Auto-stitch back device| (Standard Device)
18| Motor| 400W (1/2 HP) : 550W (3/4 HP)
Regulated output: 400W (1/2HP), Max. output: 550W (3/4 HP)
19| Power| 3 Phases/single phase
20| Electromagnetic drive power| DC-24V
21| Trimming type| Horizontal engaged trimming type

Table 4

3. Description of the functions of operation box: (Table 5)

IMPORTANT SAFETY INSTRUCTIONS OF THIS MACHINE

1. Transportation
   

2. The machine packed with two piece covers that made of expanded polystyrene to protect it.

3. Put the machine into a carton.

4. Use a cart or by two men’s hands to move it.

5. Storage

6. The machine must use duster cover to cover it when it did not work.

7. The machine avoid to storage in the temperature more than 45°C.

8. Working
   The machine doesn’t work over 40°C.

9. Warning
   Pay attention to this warning advice as the followings:

10. Working area is dangerous.

11. Never touch the needle if the machine is still running.

12. Be careful if you infeed fabric.

13. Do not insert your finger between needle and roller for transportation on fabric.
    Pay attention to the warning sticker.

14. Movable parts must be enclosed with guard when you operate.

15. Pull out the plug from socket when you adjust, thread, change bobbin and needle clean.

INSTALLATION

CAUTION
Machine installation should only be carried out by a qualified technician.
Contact your dealer or a qualified electrician for any electrical work that may need to be done.
The sewing machine weighs 36kg. The installation should be carried out by two or more people.
Do not connect the power cord until installation is complete. The machine may operate if the treadle is depressed by mistake, which could result in injury.
Use both hands to hold the machine head when tilting it back or returning it to its original position. If only using one hand, the weight of the machine head may be too heavy to hold, and may cause human physical injuries.

1. Please refer to table cut-out drawing and parts lists to install the anti-shock base and the thread stand.

OIL PAN INSTALLATION

1. The corners of the oil reservoir has to be placed on the four corners at the cut out groove of the machine table. (Fig. 9)
2. Usenails 2 as illustrated to fix two rubber seats 1 onside A(the operator’s side). Use rubber based adhesive to fix two cushion seats 3 on the hinge side (side B). Place oil reservoir 4 on the fixed seats. (Fig. 10)
3. Place the hinge 1 into the two fixing holes before placing the machine head onto the four cushions 3 of the desk. Then, install the machine head onto the machine bed that has two openings with rubber cushion 2 of each. (Fig. 11, 12)

INSTALLING THE NEEDLE

Choose aright needle size according to the type of the thread and the type of the material used. Turn the power off before placing the needle. (Fig. 13)
Choose a right needle size according to the type of the thread and the type of the material used. Turn the power off before placing the needle. (Fig. 13)

1. Turn the hand wheel to raise the needle bar to its highest position.
2. Loosen screw 2, and hold the needle 1 with its indented side A facing exactly to right in direction B, and make sure that long groove Cof the needle is facing exactly to the left in direction D.

SETTING THE BOBBIN

1. Set the bobbin in the bobbin case in the way that the thread wound direction is clockwise. (Fig. 14)
2. Pass the thread through thread slit A, and pull the thread in direction C. The thread will be pulled under the tension spring 1 and will be pulled out from notch B.
3. Be sure the bobbin rotates in the direction as the arrow shows when thread is pulled toward C.

THREAD STAND ASSEMBLY

1. Assemble the thread stand set before installing. Place the thread stand set onto the hole on the table top. (Fig. 16)
2. Fix the thread stand with a nut 1 locked under the table top.

THREADING THE MACHINE

STITCH LENGTH ADJUSTMENT

ADJUSTMENT OF KNEE-CONTROL PRESSER FOOT LIFTER

1. The standard lifting height is 10 mm by using knee-control presser foot lifter. (Fig.20, Fig. 21)
2. By adjusting the screw 1 at the knee controller, the presser foot can be lifted up to 13mm.
3. When the presser foot is adjusted to be lifted over 10mm, assure the bottom end of the needle bar 2 in its lower position 3 does not hit the presser foot.

NEEDLE THREAD/BOBBIN THREAD TENSION ADJUSTMENT

1. Needle thread tension adjustment (Fig. 22)
2. The left thread tail on the needle will be shorter after thread trimmed as you turn thread tension nut 1 clockwise. (in A direction)
3. The left thread tail will be longer, as thread tension nut 1 is turned counter clockwise (in B direction).
4. Increase the tension on needle thread by turning thread tension nut 2 clockwise (in C direction).
5. Reduce the tension on needle thread by turning thread tension nut 2 counter clockwise (in D direction).
6. Bobbin thread tension adjustment
7. The bobbin thread tension will be increased as tension adjust screw 3 is turned clockwise (in E direction).
8. The bobbin thread tension will be reduced as screw 3 is turned counter- clockwise (in F direction).

NEEDLE STOP POSITION ADJUSTMENT

THE THREAD TAKE UP SPRING ADJUSTMENT

1. Adjusting the stroke of thread take up spring 1. (Fig. 25)
2. Loosen screw 2.
3. The stroke of the thread take-up spring will be increased as the tension knob 3 is turned clockwise (in A direction).
4. The stroke will be decreased as the the knob 3 is turned counterclockwise (in B direction).
5. Adjusting the pressure of thread take up spring 1.
6. Loosen screw 2, and remove thread tension disks 5.
7. Loosen screw 4.
8. The pressure will be increased as tension knob 3 is turned clockwise (in A direction).
9. The pressure will be reduced as tension knob 3 is turned counter clockwise (in B direction).

MANUAL PRESSER FOOT LIFTING LEVER

1. Stop the machine and turn the presser foot lifting lever 1 up (in A direction) to keep it up. (Fig. 26)
2. The presser foot will be lifted up to about 5.5mm and will remain at that position. Turn hand lifter lever 1 down (in B direction) to release presser foot to its original position.

ADJUSTING PRESSER FOOT PRESSURE

1. Loosen nut 2, Turn presser spring regulator 1 clockwise (in A direction) to increase the presser foot pressure. (Fig. 27)
2. Turn presser spring regulator 1 counter clockwise (in B direction) to reduce the presser foot pressure.
3. Lock nut 2 after adjustment is done. For regular fabric, the normal pressure of the presser foot should be set at 5kg, for heavy fabric is 7kg. (To have the best sewing result, please adjust the proper presser foot pressure according to the material.)

ADJUST THE TIMING BETWEEN NEEDLE AND FEED DOG

1. Loosen screws 2 and 3 on the feed eccentric cam 1 move the feed eccentric cam 1 in the direction of the arrow or the opposite direction of the arrow, and lock the screws firmly. (Fig. 28- a/b/c)
2. Standard timing adjustment: when the upper side of the needle hole travels down to the needle plate surface, adjust the upper sides of the feed dog teeth and the needle hole to be at the same level of the needle plate upper surface. (Fig. 28-a)
3. Antedated timing adjustment: to prevent the fabric deflected from feeding, turn the eccentric cam 1 by the arrow direction to antedate the feed timing. (Fig. 28-b)
4. Delayed timing adjustment: to increase the stitch tension, extend the feed timing by turning the feed eccentric cam 1 in the opposite direction of the arrow. (Fig. 28-c)

Attention:
Please do not move the feed eccentric cam 4 too far to avoid needle breakage.

ADJUSTING THE ANGLE OF TILT OF THE FEED DOG

1. When mark A on the feed dog eccentric shaft 2 is aligned with the crest line B, the gradient becomes horizontal. (Fig. 29- a)
2. To prevent the fabric puckering, loosen the screw 1 by a screw driver and turn the feed dog eccentric shaft 2 90° toward the arrow direction to reduce the front gradient of the feed dog and to forma tilting-front status. (Fig. 29-b)
3. To prevent uneven fabric feeding, please turn the feed dog eccentric shaft 2 90 degree opposite to the arrow direction. This could decrease the backward tilt angle of the feed dog and to form a tilting – back status. (For adjusting the thick materials). (Fig. 29-c)
4. After adjusting the tilt angle of the feed dog, this will change the height of the feed dog. Therefore, please recheck its height after adjusting the tilt angle of the feed dog.

ADJUSTING THE HEIGHT OF THE FEED DOG

1. The feed dog height (the height the feed dog emerged from the needle plate surface) is set by the fabric thickness as the followings: (Fig. 30-a/b/c)
   Normal fabric : 0.85~0.95 mm (Fig. 30a)
   Heavy fabric: 1.0~1.2mm (Fig. 30b)

2. If the feed dog is emerged too much, it is very easily to form the puckers when sewing thin fabrics.

3. To adjust the feed dog height :
   (1) Loosen screw 2 oncrank 1.
   (2) Move the crank 1 up and down to move the feed bracket up and down to adjust.
   (3) Lock the screw 2 securely after the adjustments.

4. There should be no space between the plain surface of the roller 3 and the crank 1. Also, avoid the situation of parts loosening happening. Otherwise, the opening part of the crank 1 will get worn easily

CORRELATION BETWEEN NEEDLE AND HOOK

1. The timing adjustment between needle and hook is: turn the hand wheel to lower the needle bar down to the lower dead point of its stroke, and loosen the screw 1. (Fig. 31)
   (1) Adjusting the height of needle bar :
   – (DB needle) Align the mark line Aon needle bar 2 with the bottom edge of needle bar lower bushing 2, and then tighten the setscrew 1 .
   – (DA needle) Align the mark line C on needle bar 2 with the bottom edge of needle bar lower bushing 3, and then tighten the setscrew 1.
   (2) Adjusting the position of the hook :
   – (DB needle) Loosen the three setscrews on the hook, and turn the hand wheel to align the mark line B on ascending needle bar 2 with the bottom edge of needle bar lower bushing 3.
   – When a DA needle is used loosen the three setscrews on the hook, turn the hand wheel, and align marker line D on ascending needle bar 2 with the bottom edge of needle bar lower bushing 3.
   (3) After the adjustments mentioned above are done, align hook blade point 5 with the needle center 4. Keep it at the ideal clearance of 0.05 ~ 0.1mm between the needle and the hook.

2. Confirm the part number is correct before replacing hooks.
   Attention :
   If the clearance between the hook tip and the needle is less than the identified value, the hook tip will touch the needle and cause the damage of the hook tip happened easily. If the clearance is too wide, stitch skipping will occur easily.

PRESSER FOOT HEIGHT ADJUSTMENT

1. Loosen screw 1, and adjust the height of presser foot and its orientation. (Fig. 32)
2. After adjustment, lock the screw 1 securely.

THE THREAD TAKE UP STROKE ADJUSTMENT

1. Move thread guide 1 to the left (in direction A) to increase the amount of thread pulled out by the thread take-up when sewing heavy fabric. (Fig. 33)
2. Move thread guide 1 to the right (in direction B) to decrease the amount of thread pulled out by the thread take-up ‘ when sewing light-weight materials.
3. Ingeneral, thread guide ( 1 is positioned to have the marker line C aligned with the center of the screw.

ADJUSTING THE TENSION ON PEDAL AND PEDAL STROKE

1. Adjusting the front part treading pressure of the pedal. (Fig. 34)
   (1) The pressure of the pedal can be adjusted by changing the mounting position of pedaling pressure adjust spring 1.
   (2) The pressure is reduced when moving the spring hook to left side.
   (3) The pressure is increased when moving the spring hook to right side.

2. Adjusting the rear part treading pressure of the pedal.
   (1) The rear part treading pressure of the pedal can be adjusted by driving the regulator screw 2.
   (2) The pressure is increased when you follow the direction on the screw to drive it.
   (3) The pressure is decreased when you drive the screw by the opposite direction of the arrow on the screw.

3. Adjusting the pedal stroke.
   The pedal stroke is shorter as connecting rod 3 moved to the left holes.

ADJUSTING THE PEDAL

1. Install the connecting rod. (Fig. 35) Move the pedal 3 left and right as the arrow shows in the figure in order to align the motor control lover 1 with the connecting rod 2.
2. Adjusting the slope of the pedal.
   (1) The tilt degree can be changed and adjusted freely by changing the length of the connecting rod.
   (2) The length of the connecting rod 2 is adjusted by loosening the adjusting screw 4.

ADJUSTING THE AMOUNT OF OIL IN THE HOOK

1. The oil amount adjustment screw is mounted on the hook driving shaft. Turn the screw counter clockwise toward “+” direction (Adirection) to increase the amount of oil supplied in the hook. Turn the screw clockwise toward ‘—” direction (Bdirection) to  educe the amount of oil supplied in the hook. (Fig. 39)
2. After the amount of oil in the hook is properly adjusted, run the machine idly for 30 seconds to do oil splashing observation test to reconfirm the amount of oil in the hook.

LIGHTENING OF THE OPERATION ENVIRONMENT

Provide a warning that an industrial sewing unit or sewing system must always be unplugged from the local lighting of the sewing area before relamping, the marking of maximum rated input of a lamp shall be easily discernible while the lamp is being replaced indicated on or near the lamp socket as shown on Fig. 40.

CONDITIONS OF ALL OPERATORS

1. Read and understand well the content of this instruction book.
2. Know the functions of major parts and understand the notices.
3. Truely realize the meanings of all warning tags.
4. Realize and be familiar with how to operate this machine.
5. Operators have to keep well mental status.
6. Operators shall wear appropiate and proper working suits.
7. Develop the familiarity of how to operate the machine if needed.

OPERATING THE PEDAL

The foot pedal is operated as the following 4 steps. (Fig. 41)

1. Lightly tread the front part of the foot pedal shown as Bin Fig. 32, machine runs at low sewing speed.
2. Further, tread the front part of the foot pedal shown as A, Machine runs at high sewing speed. (The machine runs at high speed after it completes the backstitch if the automatic backstitch has been preset.)
3. Reset the pedal to its original position, shown as C. Machine will stop (with the needle up or down.)
4. Fully depress the back part of the pedal shown as E, so that machine trims threads.
5. Attentions:
   (1) One extra step is given between the machine stop and thread trimming sieps if your machine is equipped with the auto presser foot lifter. When you lightly depress the back part of the pedal, shown as D, the presser foot goes up. The thread trimmer aciuates if you further tread the back part of the pedal.
   (2) Machine will stop after completing the backstitch if you relocate the pedal to its neutral position during executing the automatic backstitch.
   (3) Whether the machine is under high speed or low speed sewing, you can make the machine doing thread trimming any time by tread down the back part of the pedal to do so.
   (4) Even if you reset the foot pedal to its neutral position C immediately after the machine started thread trimming action, the machine will completely periorm thread trimming.
   (5) When the machine stops and makes the needle located at the lower dead end, tread the back part of the foot pedal once to D if you want to bring the needle up.

OPERATING THE ONE TOUCH TYPE REVERSE FEED STITCHING MECHANISM

1. Press the switch lever (I) to start the back stitch function. (Fig. 42)
2. Aslongas the switch lever is pressed, the sewing machine will continue doing back stitch.
3. Release the switch lever, and the sewing machine will resume the normal sewing function.

MAINTENANCE

CAUTION
Turn off the power switch before carrying out cleaning. The machine may operate if the  treadle is pressed incautiously, which could result in injury.
Be sure to wear protective goggles and gloves when handling the lubricating oil and grease so that they do not get into your eyes or onto your skin, otherwise inflammation ca be resulted.
Furthermore, do not drink or eat the oil nor the grease for they can cause vomiting and diarrhea. Keep the oil away of the reach of children.
Use both hands to hold the machine head when tilting or returning it to its original position.
If only using one hand to move the machine, the weight of the machine head may cause slipping and you may get hurt.
For keeping the machine quality and lengthening the usage term of this sewing machine, please maintain it everyday. In addition, before first use after a long idling time, please follow the following steps to maintain.
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1. Raise the presser foot.
2. Remove the two screws 1, and then remove the needle plate 2.
3. Use a soft brush to clean dust and lints on the feed dog teeth 3. (Fig. 43)
4. Install the needle plate 2 after doing the above cleaning.
5. Tilt back the machine head.
6. Periodical Maintenance Items(Table 7)

2. Check if there has enough liquid oil inside the oil pan. (The amount should be between the red up and down paint mark of the oil level gauge.)
3 Keep the machine and the operation table clean.
Weekly| 1 Keep the power cords looking clean and neat.
2 Keep the operational panel clean.
3 Check if the power parts is loosening or still at the right position.
Quarterly| 1 Replace the liquid oil inside the oil pan.

OIL LUBRICATION

1. Oil lubrication instruction (Fig. 44)
   (1) Fill the oil pan with specified oil up to high mark A.
   (2) Refill the oil pan with the specified oil if the oil level is lower below low mark B.
   (3) You will see oil splashing via the oil sight window 2 if the lubrication functions well when machine runs.
   (4) When running the machine first time or after a period of idling time, please run your machine at 3,000 S.PM. to 3,500 S.PM. for about 10 minutes.

2. Oil supply adjustment for needle bar/thread take-up lever (Fig. 45)
   (1) Turning adjust pin 1 to adjust the supplied oil volume to the needle bar crank 2 and the thread take-up 3.
   (2) To decrease supplied oil amount, turn the adjust pin 1 indirection B to make the mark A close to the needle bar crank 2.
   (3) To increase the supplied oil amount, turn the adjust pin 1 in direction C to make the mark A away from the needle bar crank 2.

3. Adjust the oil amount of the hook (oiling amount).
   (1) Oil splashing test paper is about 25mm x 70mm. Any material of test paper is accepted. The material will not affect results. (Fig. 46)(2) Confirm the oil amount. Place the test paper under the hook and fit the paper closely against to the wall of the oil pan. (Fig. 47)
   THHOOK (PAPER GPOIL PAN TOUCHING ‘SiBASE t@BUSHING
   When doing step (2), carefully remove the sliding plate and do not touch the hook with fingers.

4. Attentions :
   (1) If the machine doesn’t warm up enough, please run the machine 3 minutes idly.
   (2) While the machine is running, place the oil splashing test paper under the hook. (Fig. 47)
   (3) Confirm that the height of the oil level in the oil pan falls between “ HI and “ LOW “.
   (4) Oil splashing observation test should be completed in 5 seconds.(Usea watch to check the time used.)![Siruba DL7200C Automatic Plain Sewing Machine

• fig 41](https://manuals.plus/wp-content/uploads/2024/04/Siruba-DL7200C- Automatic-Plain-Sewing-Machine-fig-41.png)

  5. Asample of observations indicate the appropriate oil amount. (Fig. 48)
     Oil amount in the hook (small) as shown is approximated 1mm.
     DL7200-BM : 1.5mm
     DL7200-BH : 3mm
     Oil amount in the hook (large) as shown is approximated 2mm
     DL7200-BM : 3mm
     DL7200—BH : 6mm

1. The amount of oil in the hook (ref. to the sample shown on Fig.9) should be adequately adjusted according to the sewing materials and processes. Insufficient amount of oil will cause the hook to cease and overheat. Excess amount of oil may cause the sewing product stained with oil.
2. Adequate adjustment should be reached in the way that same oil splashing observation will be collected in 3 times on separate paper.

DEMOLITION PROCEDURE

1. When the machine needs to be eliminated and demolished, certain basic rules must be observed to protect the environment and public health.

2. ALL machine components must be divided according to categories as the followings:
   (1) All sheathes, flexible hosing and plastic or non-metal components.
   (2) Electricity components: switches, or lighting components.
   (3) Insulation materials: rock wool, and flexible rubber strips.
   (4) Metals: ferrous metals, copper, bronze and brass, various.

3. Inthis way, all materials can be eliminated correctly, recycled, or melted down for re- use or disposed of so that they do not harm the environment.

CONVERSION CHART

| | | | | | | | |
---|---|---|---|---|---|---|---|---|---
MODEL| SUB-CLASS| NEEDLE PLATE| FEED DOG| PRESSER FOOT| HOOK ASM| CASE ASM| BOBBIN| BOBBIN NEEDLE| MOTOR
DL7200C-BM1-10 -DL72000-BM1-16| | E1704| D1701| P1701| G1121| G1202| G1303| DBX1#14| BML-487P0046A
DL7200C-BM1A-10 -DL7200C-BM1A-16| | E1704D| D1702| P1701| G1125J| G1202| G1303| DBX1#21| BML-487P0046A
DL72000-BH1-10 -‘DL7200C-BH1-16| | E1711| D1711| P1711| G1125J| G1202| G1303| DBX1#21| BML-487P0046A
DL7200C-BH1A-10 -DL7200C-BH1A-16| | E1711D| D1711D| P1711D| G1125J| G1202| G1303| DBX1#21| BML-487P0046A
DL72000-BX2-10 -DL7200C-BX2 -16| | E2711| D2711| P2711| 62125J| G2202| G2303| DPX5#21| BML-487P0055A

KAULIN MFG.CO., LTD.
The specification and/or appearances of the equipment described in this parts
list are subject to change because of modification which will without previous notice.
BYL-13S15.JAN.2023

Documents / Resources

| Siruba DL7200C Automatic Plain Sewing Machine [pdf] Instruction Manual
DL7200C Automatic Plain Sewing Machine, DL7200C, Automatic Plain Sewing Machine, Plain Sewing Machine, Sewing Machine
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