Bobbin Winder Stopper: Preventing Over-Winding

The bobbin winder stopper is an essential feature on sewing machines that prevents the bobbin from being over-wound, which can cause thread tangling or damage to the machine. If you are experiencing issues with over-winding, here’s how you can address and adjust the bobbin winder stopper:

1. Understand the Bobbin Winder Mechanism

The bobbin winder stopper typically consists of a small arm or lever that makes contact with the bobbin. When the bobbin is full, this arm stops the winding process automatically.

2. Check the User Manual

Refer to your sewing machine’s user manual for specific instructions on how the bobbin winder and stopper are designed to function on your model. This will give you a clear understanding of how to adjust it properly.

3. Inspect the Bobbin Winder Stopper

• Position: Ensure the stopper arm is positioned correctly to make contact with the bobbin. If it is misaligned, it might not function properly.
• Wear and Tear: Check for any wear or damage to the stopper arm. Over time, it might wear out and require replacement.

4. Adjust the Stopper Mechanism

If the stopper is not preventing over-winding, you might need to adjust its position:

1. Locate the Adjustment Screw: Many machines have a small screw that allows you to adjust the stopper position. This screw is usually located near the bobbin winder assembly.

2. Adjust the Position:

   • Use a small screwdriver to loosen the adjustment screw.
   • Move the stopper arm closer to or further from the bobbin as needed.
   • Tighten the screw once the stopper is in the correct position.

5. Test the Adjustment

• Place an empty bobbin on the bobbin winder spindle.
• Engage the bobbin winder and begin winding.
• Observe whether the stopper arm contacts the bobbin and stops the winding when the bobbin is full.

6. Fine-Tune if Necessary

If the bobbin is still over-winding:

• Move the stopper arm slightly closer to the bobbin and test again.
• Continue adjusting until the bobbin winder stops at the correct point.

7. Regular Maintenance

• Clean the bobbin winder area regularly to prevent lint or thread buildup, which can affect the stopper mechanism.
• Ensure the bobbin winder spindle is free of debris and operates smoothly.

Troubleshooting Common Issues

• Bobbin Not Winding Evenly: Ensure the bobbin is placed correctly on the spindle and the thread is guided properly through the tension disk.
• Bobbin Winder Not Engaging: Check for any obstructions or misalignments in the bobbin winder mechanism.

By following these steps, you can adjust and maintain the bobbin winder stopper to ensure it functions correctly and prevents over-winding, protecting your sewing machine and ensuring smooth sewing projects.