Jack F4 Power Saving Lockstitch Sewing Machine

Product Information

Product Standard Code: QB/T2256-2006

Manufacturer: JACK SEWING MACHINE CO., LTD.

Company Address: No. 15 Rd Airport South, Jiaojiang District Taizhou City, Zhejiang, P. R. C

Postal Code: 318000

Domestic Sales Department: TEL: 0086-0576-88177788, 88177789; FAX: 0086-0576-88177758

International Trade Department: TEL: 0086-0576-88177782, 88177774; FAX: 0086-0576-88177787

Toll-Free After-Sales Service Hotline: 400-8876858

Website: http://www.chinajack.com

Note: Information is subject to change without prior notice. Please refer to the actual product.

Before Operation

1. Never operate the machine unless its oil pan has been filled with oil.
2. Check the direction of motor rotation. The handwheel should turn counterclockwise when observed from the handwheel side. Do not reverse.
3. Confirm that the voltage and phase are correct according to the motor nameplate.

Operation Precautions

1. Keep hands away from the needle when the power is on or the machine is operating.
2. Do not put fingers into the thread take-up cover while the machine is operating.
3. Turn the power switch OFF before tilting the machine head or removing the V-belt.
4. Turn off the power when the operator leaves the machine.
5. Keep all persons, hands, and objects away from the bobbin winder and handwheel during operation.
6. Do not operate the machine while installing or removing protective covers.
7. Do not clean the machine head surface with thinner.

Installation

1. Machine Installation (Fig. 1, Fig. 2, Fig. 3, Fig. 4)

Installing the oil pan:

1. Attach the oil pan holder and oil pan cushion to the four corners of the oil pan, then install the oil pan on the stand & table.
2. Ensure the two oil pan holders face the operator, and the two oil pan cushions are on the side with the machine head connecting hook.
3. Install the machine head connecting hook base on the stand & table, insert the machine head connecting hook into the baseplate hole, and place the head on the stand & table, ensuring the hook engages with the base.

Lubrication

2. Lubrication (Fig. 5, Fig. 6)

1. Information on lubrication (Fig. 5):

• Before starting: Fill the oil pan with sewing machine oil (10 white oil) up to the HIGH mark (A). Refill when the oil level drops below the LOW mark (B).
• After lubrication, operate the machine and check for splashing oil through the sight window (②) to ensure adequate lubrication. The amount of splashing oil does not affect the total lubricating oil amount.
• Precaution: For new or long-unused machines, run at 1800-2200 RPM for about 10 minutes for break-in.

2. Oil supply to the face plate parts (Fig. 6):

The amount of oil supplied to the face plate parts is controlled by the plug of the main shaft.

Threading

3. Threading the Machine Head (Fig. 7)

Tension Adjustments

4. Thread Tension (Fig. 8)

1. Needle thread tension adjustment:

• Adjust needle thread tension using the tension adjust nut according to sewing specifications.
• Turning the nut clockwise (A) increases tension.
• Turning the nut counterclockwise (B) decreases tension.

2. Bobbin thread tension adjustment:

• Turning the tension adjust screw clockwise (C) increases bobbin thread tension.
• Turning the screw counterclockwise (D) decreases bobbin thread tension.

5. Thread Take-Up Spring (Fig. 9)

1. Changing the stroke of the thread take-up spring:

• Loosen setscrew (②).
• Turning the tension post clockwise (A) increases the stroke.
• Turning the knob counterclockwise (B) decreases the stroke.

2. Changing the pressure of the thread take-up spring:

• Loosen setscrew, take out tension assembly.
• Loosen setscrew, remove tension post.
• Turning the tension post clockwise (A) increases pressure.
• Turning the post counterclockwise (B) decreases pressure.

Needle and Hook Timing

6. The Relation Between the Needle and the Hook (Fig. 10)

Ensure the needle and hook are timed correctly:

1. Turn the pulley to the lowest needle position, loosen the needle bar connecting post setscrew (①).
2. Needle bar height: Pull the needle bar so that 1/3-1/2 of the needle eye is visible through the inner hook's edge (needle must be correctly inserted). Position the needle's thread groove to the left, then tighten the needle bar connecting post screw.
3. Hook position: Loosen the hook fixing screw. Align the tip of the hook (③) with the center line of the needle (②). Turn the pulley so the hook tip is 1-1.5mm above the needle hole's top edge.
4. With the above alignment, move the hook left and right to achieve a horizontal clearance of 0-0.05mm between the needle and hook, then tighten the hook fixing screw.

Precaution: If the clearance is too small, the hook tip may be abraded. If it is too large, it may cause skipped stitches. Use the same model of hook when replacing.

Pedal Adjustments

7. Pedal Pressure and Pedal Stroke (Fig. 11)

1. Adjusting the pressure to depress the front part of the pedal:

• Change the mounting position of the pedaling pressure adjust spring.
• Hooking the spring on the left side decreases pressure.
• Hooking the spring on the right side increases pressure.

2. Adjusting the pressure to depress the back part of the pedal:

• Use the regulator screw (②) to adjust this pressure.
• Turning the regulator screw in increases pressure.
• Turning the screw out decreases pressure.

3. Adjusting the pedal stroke:

• Insert the connecting rod into the right hole to increase the stroke.

Knee Lifter Adjustment

8. Adjusting the Height of the Knee Lifter (Fig. 14, Fig. 15)

• The standard presser foot lift using the knee lifter is 10 mm.
• The presser foot lift can be adjusted up to 13 mm using the knee lifter adjust screw (①).
• Ensure the bottom end of the needle bar in its lowest position does not hit the presser foot (③) when the lift is adjusted over 10 mm.

Specifications

9. SPECIFICATIONS

Energy-saving Servo Motor User Guide

Perface

CAUTION: READ INSTRUCTION MANUAL CAREFULLY BEFORE OPERATING. INSTALLATION AND OPERATION MUST BE PERFORMED BY PROFESSIONALLY TRAINED STAFF. This product applies only to specified sewing equipment; do not use for other purposes.

SAFETY INSTRUCTION

1. Read this manual carefully before installation and adjustment.
2. Installation and operation must be performed by professional trained staff.
3. Do not change the structure or any motor parts; the customer assumes full responsibility.
4. Confirm the power connection is grounded and complies with voltage and technical requirements on the nameplate.
5. Keep feet away from the speed governor when power is on or off.
6. Cut power before the following operations:
   • Installing the machine.
   • Inserting or pulling out plugs in the control box.
   • Threading, changing needle, and rotating the machine head.
   • Machine maintenance when the machine is idle.
7. Control system settings and maintenance should be done by trained staff.
8. Allow a 20-second interval between power changes.
9. Ensure the system is properly grounded for safety.

I. Installation of Speed Governor

The governor rod should be perpendicular to the pedal. An adjustment rod angle of high front and low back, making the pedal angle 15 degrees relative to the ground plane, is advisable (Picture 1 and Picture 2).

II. Operation Instruction of Operation Panel

In the P interface, the first display shows “P”, and the second shows “-” (bottom position) or “U” (up position).

1. Parameter Adjustment

1.1 Speed Adjust:

The panel shows “P”. Press “+” or “-” to adjust speed up or down. After 3 seconds, the parameter is saved, and the panel returns to “P”. Example: 35 means 3500 RPM/min (Picture 3, Picture 4).

1.2 Needle Position Adjust:

The panel shows “P”. Press “+” or “-” for 3 seconds to set the needle position up or down (Picture 5, Picture 6).

1.3 Reset to Factory Defaults Parameter:

If the control box malfunctions or parameters are abnormal, showing E5/E7 error codes, factory defaults can be reset. The panel shows “P”, press “-” for 3 seconds. “OK” indicates success; “Er” indicates failure (Picture 7, Picture 8).

1.4 Error Solve with One Button:

When an error code is displayed and the machine is not working, press “+” and “-” to adjust and view the error code. If the error persists, the code remains displayed. If resolved, it returns to “P”.

III. Operation Requirements

1. Keep the control box away from magnetic or high radiation environments.
2. Operational temperature range: -5°C to 40°C.
3. Do not use near heaters or radiators.
4. Do not use in excessively wet conditions.
5. Do not use in corrosive or explosive environments.
6. Ensure ventilation for the control box and motor.
7. Maintain stable power supply voltage.
8. Ensure a qualified ground connection for safety.

IV. Maintenance and General Recovery Processing

Maintenance and operation should be performed by professional trained personnel.

1. No reaction when turning on the power control box:

Check if the power plug is securely connected or if the fuse is burnt. If burnt, replace it with one of the same type. Open the control box, locate and replace the burnt fuse.

2. Control box connected, but the motor does not work when pressing the pedal:

Check if the speed controller plug is correctly connected to the control box socket. Check if the speed controller is broken.

3. Motor does not stop without operation:

Check if the magnetic steel coil position has changed. Open the speed governor, adjust the plastic rocker arm so the magnetic steel coil is aligned with the hall sensor. If the motor continues to run, adjust the rocker arm clockwise (Picture 9).

4. Fuse immediately burns upon turning on the machine:

After replacing the fuse with the same specification, if the problem persists, contact a local agent for repair.

5. Other problems not listed:

Please contact a local agent.

Error Code List

Note: If an error persists after troubleshooting, contact the manufacturer.