Introduction
The JUKI DDL-8700-7 Single Needle Drop Feed Automatic Industrial Sewing Machine is designed for efficient and high-quality sewing. It comes complete with a table, legs, servo motor, and LED lamp. This machine features mechanisms optimized for low-tension sewing, allowing it to handle various materials and consistently produce beautiful, uniform seams.
This manual provides essential information for the setup, operation, maintenance, and troubleshooting of your Juki DDL-8700-7 sewing machine.
Setup and Assembly
Your Juki DDL-8700-7 machine is designed for quick setup as it arrives largely pre-assembled. Follow these steps to prepare your machine for operation:
- Unpacking and Placement: Carefully unpack all components. The machine, table, stand, 110V motor, and drawer are included. Place the assembled table and stand in your desired workspace.
- Machine Mounting: The machine head is already mounted to pin hinges in the stand. Ensure it is securely seated.
- Oil Pan Installation: The oil pan should be pre-installed. Verify its correct position and ensure it is clean.
- Belt Tension Adjustment: The belt tension is pre-adjusted. Do not alter unless necessary and refer to a qualified technician.
- Belt Guard Installation: The belt guard is pre-installed for safety.
- Lubrication: Pour the recommended JUKI MACHINE OIL 7 (or equivalent ISO VG7) into the designated oil reservoir. Refer to the machine's oil level indicator.
- Thread Stand Setup: Assemble and set up the thread stand according to the included instructions. This typically involves attaching the vertical rod and thread guides.
- Power Connection: Connect the machine to a standard 110V power outlet. The machine is ready to plug in directly.
Figure 1: Fully assembled Juki DDL-8700-7 machine with table and stand.
Figure 2: View of the servo motor installed beneath the machine table.
Operating Instructions
The Juki DDL-8700-7 is equipped with a highly efficient servo motor and an advanced control panel for precise operation.
Servo Motor Advantages
- Energy Efficiency: Uses up to 90% less power compared to traditional clutch motors.
- Lightweight Design: Approximately 1/3 lighter than clutch motors.
- Reverse Rotation: Motor rotation can be reversed with a simple flick of a switch.
- Durability: Fewer wear-and-tear parts, reducing maintenance needs.
- Consistent Speed: Maintains configured speed regardless of foot pedal pressure.
Control Panel (CP-18 / SC-920C)
The SC-920C control box, paired with the M92 servomotor, offers robust and energy-efficient control. It is designed to be resistant to voltage fluctuations, noise, and vibration.
- Energy-Saving Mode: The SC-920C features an energy-saving mode that reduces power consumption by approximately 25% during standby (when the motor is not rotating) compared to previous models.
- Automatic Reverse Feed: This function is provided as standard, allowing for easy back-tacking at the start and end of seams.
Figure 3: The CP-18 control panel for machine settings.
Basic Sewing Operation
- Threading: Follow the threading path indicated on the machine. Ensure the thread is correctly seated in all guides and tension discs.
- Needle Selection: Use DB X 1 needles, suitable for sizes 9-18, depending on your fabric and thread.
- Bobbin Winding and Insertion: Wind the bobbin evenly and insert it into the automatic-lubricating full-rotary hook mechanism.
- Stitch Length Adjustment: Adjust the stitch length using the dial on the machine head. The maximum stitch length is 4mm.
- Presser Foot Lift: The presser foot can be lifted by hand (up to 5.5 mm) or by knee lever (up to 13 mm) for easy fabric placement.
- Starting to Sew: Place your fabric under the presser foot. Lower the presser foot. Gently press the foot pedal to begin sewing. The machine will maintain the configured speed.
- Reverse Stitching: Utilize the automatic reverse feed function for securing stitches at the beginning and end of seams.
Figure 4: Detailed view of the needle, presser foot, and feed dog area.
Figure 5: Top view of the Juki DDL-8700-7 machine head, showing the thread path and controls.
Maintenance
Regular maintenance ensures the longevity and optimal performance of your Juki DDL-8700-7 sewing machine.
- Lubrication: The machine features automatic lubrication. Regularly check the oil level in the reservoir and replenish with JUKI MACHINE OIL 7 (equivalent to ISO VG7) as needed. Ensure the oil is clean and free of debris.
- Cleaning:
- Periodically clean lint and dust from the bobbin case area, feed dog, and under the needle plate using a small brush or vacuum.
- Wipe down the exterior of the machine with a soft, dry cloth.
- Needle Replacement: Replace needles regularly, especially when sewing different materials or if you notice skipped stitches or fabric damage.
- Professional Servicing: For complex issues or annual tune-ups, it is recommended to have the machine serviced by a qualified industrial sewing machine technician.
Troubleshooting
This section addresses common issues you might encounter with your Juki DDL-8700-7. For more detailed troubleshooting, please refer to the comprehensive service manual or contact customer support.
| Problem | Possible Cause | Solution |
|---|---|---|
| Skipped Stitches | Incorrect needle insertion, bent or dull needle, improper threading, incorrect needle size for fabric. | Re-insert needle correctly, replace needle, re-thread machine, use appropriate needle size. |
| Thread Breakage | Incorrect tension, poor quality thread, burrs on needle plate or hook, incorrect threading. | Adjust tension, use quality thread, check for burrs and smooth them, re-thread machine. |
| Uneven Stitches | Inconsistent fabric feeding, tension issues, worn feed dog. | Ensure even fabric feeding, adjust tension, clean feed dog, consider professional inspection. |
| Machine Not Starting | Power cord not connected, emergency stop engaged, motor issue. | Check power connection, disengage emergency stop, contact technician if motor is unresponsive. |
Always unplug the machine from the power source before performing any inspection or maintenance.
Specifications
| Feature | Detail |
|---|---|
| Model Number | DDL 8700-7 |
| Brand | iKonix |
| Application | Medium-Weight Materials |
| Max. Sewing Speed | 5000 Stitches per Minute |
| Max. Stitch Length | 4mm |
| Needle Bar Stroke | 30.7mm |
| Lift of Presser Foot (Hand) | 5.5 mm |
| Lift of Presser Foot (Knee) | 13 mm |
| Needle Type | DB X 1, sizes 9-18 |
| Feed Dog | 4-row |
| Hook Type | Automatic-lubricating full-rotary hook |
| Lubrication | Automatic |
| Lubricating Oil | JUKI MACHINE OIL 7 (equivalent to ISO VG7) |
| Control Box | SC-920C (Compact-size servomotor M92, 450W) |
| Machine Motor | Single-phase 100~240V, 3-phase 200~240V |
| Power Requirement | Single-phase 100~240V, 3-phase 200~240V |
| Power Consumption | 320VA |
| Unit Dimensions (LxWxH) | 48 inches x 20 inches x 48 inches |
| Item Weight | 229 pounds |
| UPC | 880336697903 |
Warranty and Support
For specific warranty details, please refer to the documentation provided at the time of purchase or contact the seller directly. Warranty terms typically cover manufacturing defects for a specified period.
For technical support, parts, or service inquiries, please contact your authorized iKonix dealer or the point of purchase. Ensure you have your model number (DDL 8700-7) and purchase date available when seeking support.
While protection plans may be available for purchase separately, these are distinct from the manufacturer's warranty.
