Moonshan GS8-015
Moonshan GS8-015 Portable Speed Bag Sewing Machine & Bag Closer Instruction Manual
Model: GS8-015 | Brand: Moonshan
1. Introduction
This manual provides detailed instructions for the safe and efficient operation, setup, and maintenance of your Moonshan GS8-015 Portable Speed Bag Sewing Machine & Bag Closer. This device is designed for industrial packaging applications, specifically for sealing bags made from non-woven fabrics, rice bags, hard blankets, cowhide composite bags, leather, towels, paper bags, and flour bags. It is not intended for household sewing tasks.

Image 1.1: Moonshan GS8-015 Portable Speed Bag Sewing Machine.
2. Safety Instructions
Please read and understand all safety warnings and instructions before operating the machine to prevent injury or damage.
- Power Supply: Ensure the machine is connected to a power source that matches the specified voltage (110V). Always unplug the machine before performing any maintenance or adjustments.
- Keep Hands Clear: Never place hands or fingers near the needle or moving parts while the machine is operating.
- Eye Protection: Wear appropriate eye protection during operation to guard against flying debris.
- Stable Surface: Operate the machine on a stable, flat surface to prevent tipping.
- Ventilation: Ensure adequate ventilation during prolonged use, as the motor may generate heat.
- Children and Pets: Keep children and pets away from the machine during operation and when it is plugged in.
- Proper Use: Use the machine only for its intended purpose of bag closing. Do not attempt to sew materials beyond its specified thickness or type.
- Noise: Due to the high-speed motor, some noise is unavoidable during operation. Consider hearing protection for extended use.
3. Package Contents
Verify that all items listed below are included in your package:

Image 3.1: What's in the package for the Moonshan GS8-015 Bag Closer.
- Moonshan GS8-015 Bag Closer Machine
- Hexagon wrench
- Wrench for needle
- Oil pot
- Synchronous belt
- Crochet hook
- User manual
- FAQ instruction
- Elastic rope for needle threader
- 10 pcs * Needle
- Hook
- Needle threader
- Speed controller
4. Setup
4.1 Threading the Machine
Proper threading is crucial for consistent and strong stitches. Follow these steps carefully:
- Place the thread spool onto the designated holder.
- Guide the thread through the upper thread guide.
- Pass the thread through the tension discs, ensuring it is seated correctly.
- Thread the needle from front to back.
- Pull a few inches of thread through the needle eye.
Video 4.1: Threading demonstration for the Moonshan Bag Sewing Machine.
4.2 Connecting the Speed Controller (if applicable)
If your model includes a speed controller, connect it as shown in the diagram. This allows for adjustable sewing speeds to suit different materials and tasks.

Image 4.2: Speed controller for the Moonshan GS8-015.
Video 4.3: Demonstration of connecting and adjusting the speed controller for the Moonshan Adjustable Speed Bag Closing Machine.
5. Operating Instructions
5.1 Material Compatibility
The Moonshan GS8-015 is designed for various bag materials. Ensure the total thickness of the stitched layers is less than 3mm after compression.

Image 5.1: Material compatibility and layer thickness guidelines.
- Sandbags: 2-12 Layers
- Nonwoven bags: 2-14 Layers
- Rice bags: 2-14 Layers
- Blanket: 2 Layers/3mm
- Cowhide composite bag: 2-10 Layers
- Leather: 2 Layers/2-3.5mm
- Paper bags: 2-10 Layers
- Towel: 2 Layers/3.5mm
5.2 Sewing Process
Hold the machine firmly and guide the material smoothly under the presser foot. The machine operates at a high speed, capable of sealing over 5,000 bags per day with a work efficiency of 2 seconds per bag.
Video 5.2: Operation demonstration of the bag sewing machine on various materials.
5.3 Thread Cutting
The machine offers both manual and automatic thread cutting options:
- Automatic Cutting: After sewing, lift the machine slightly, and the cutting knife will automatically cut the thread.
- Manual Cutting: A blade located next to the machine allows for manual thread cutting if preferred.

Image 5.2: Automatic and manual thread cutting features.
6. Maintenance
Regular maintenance ensures the longevity and optimal performance of your bag closer.
6.1 Oiling
The machine body is equipped with oiling holes. Regularly inject sewing machine oil into these holes before and after each use to maintain smooth operation and prevent wear.

Image 6.1: Oiling points for easy maintenance.
6.2 Thread Replacement and General Maintenance
Refer to the video below for detailed instructions on replacing the thread and performing general maintenance tasks.
Video 6.2: How to replace thread and maintain the FunSealer bag sewing machine.
7. Troubleshooting
This section addresses common issues you might encounter with your bag closer.
7.1 Common Issues and Solutions
| Problem | Possible Cause | Solution |
|---|---|---|
| Skipped Stitches | Incorrect needle insertion, bent needle, improper threading, incorrect tension. | Re-insert needle correctly, replace bent needle, re-thread the machine, adjust thread tension. |
| Thread Breakage | High thread tension, worn needle, poor quality thread, burrs on thread path. | Reduce tension, replace needle, use quality thread, check thread path for obstructions. |
| Loose Stitches | Low thread tension, incorrect stitch length. | Increase thread tension, adjust thread tension, adjust stitch length as needed. |
| Machine Not Starting | Power cord not connected, power switch off, motor issue. | Check power connection, ensure switch is on, contact support if motor fails. |
8. Specifications
| Feature | Detail |
|---|---|
| Product Dimensions | 3 x 10 x 10 inches (7.6 x 25.4 x 25.4 cm) |
| Item Weight | 6.4 pounds (2.9 kg) |
| Manufacturer | Moonshan |
| Model Number | GS8-015 |
| Brand | Moonshan |
| Color | Silver |
| Material | Aluminum Alloy |
| Power Source | AC |
| Motor Power | 90 W |
| Motor Speed | 11000 rpm |
| Stitches per Minute | 2600 |
| Stitch Length | 7-10mm Adjustable |
9. Warranty and Support
For warranty information, technical support, or service inquiries, please contact Moonshan customer service directly. Refer to the contact information provided with your product packaging or visit the official Moonshan website.
Manufacturer: Moonshan
Amazon Store: Visit the Moonshan Store on Amazon
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