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Computerized sewing machines have transformed the world of textile production and DIY crafting. With automatic stitching patterns, digital controls, and programmable features, they offer speed, accuracy, and versatility far beyond mechanical models. However, like any sophisticated device, computerized sewing machines can occasionally encounter problems—especially if they aren’t maintained or used correctly.

Whether you're a hobbyist, a tailor, or a factory operator, understanding the common issues and how to fix them can save time, reduce frustration, and extend the life of your machine.

In this post, we’ll explore typical issues faced by computerized sewing machines and provide practical troubleshooting tips—featuring insights from Sanhexin, a reputable manufacturer specializing in the R&D and production of advanced sewing machine solutions.

About Sanhexin

Sanhexin Sewing Machine Co., Ltd. is a leading Chinese enterprise dedicated to developing and producing high-performance sewing machines for various industries, from garment manufacturing to home textiles. With a strong focus on innovation, quality control, and user experience, Sanhexin's computerized sewing machines are known for their durability, precision, and ease of use.

1. Machine Won’t Turn On

Possible Causes:

Power supply not connected properly

Faulty power switch or blown fuse

Internal electrical issue or firmware malfunction

Troubleshooting Steps:

Ensure the power cord is securely plugged in.

Try another outlet or test with a different cable.

Check for any visible fuse (some models have external fuses) and replace if blown.

If the machine still doesn’t power on, contact Sanhexin’s technical support team for professional diagnostics.

Pro Tip: Sanhexin machines come with built-in surge protection features—always use a surge protector for added safety.

2. Display Screen Freezes or Malfunctions

Possible Causes:

Software glitch

Memory overload from user-programmed stitches

Faulty touch panel or loose connection

Troubleshooting Steps:

Restart the machine to reset the interface.

If you’ve recently installed new stitch patterns, remove them and test.

For recurring issues, update the firmware (available through Sanhexin’s official website).

If the touch panel becomes unresponsive, contact a certified technician.

3. Needle Breaks Frequently

Possible Causes:

Wrong type or size of needle

Bent or dull needle

Incorrect threading or tension

Fabric too thick for the selected needle

Troubleshooting Steps:

Always use the needle type recommended for your specific Sanhexin model.

Replace the needle regularly (after every 8 hours of use).

Rethread the upper and lower threads carefully, checking for snags.

Lower the sewing speed when working with dense or layered materials.

4. Skipped Stitches

Possible Causes:

Incorrect needle installation

Mismatched needle and fabric type

Machine needs cleaning or oiling

Improper thread tension

Troubleshooting Steps:

Ensure the needle is inserted correctly, flat side facing the correct direction.

Use a fresh, sharp needle appropriate for your fabric.

Clean the bobbin case and feed dogs from lint or debris.

Adjust the thread tension incrementally and test on scrap fabric.

Sanhexin’s computerized machines feature automatic tension adjustment on some models, which can be calibrated if needed using the digital control panel.

5. Thread Keeps Breaking

Possible Causes:

Thread too thin or poor quality

Incorrect threading path

Tension too tight

Burrs on needle or thread guides

Troubleshooting Steps:

Use good-quality, compatible thread (especially for embroidery or decorative stitching).

Rethread the entire machine carefully, ensuring the thread is seated in the tension discs.

Check the needle eye for sharp edges or burrs and replace if necessary.

Loosen the tension slightly and test again.

6. Machine Making Unusual Noises

Possible Causes:

Build-up of dust, lint, or thread in moving parts

Lack of lubrication

Loose screws or worn gears

Troubleshooting Steps:

Turn off the machine and unplug it before inspection.

Use a soft brush to remove lint from the bobbin area, feed dogs, and shuttle.

Apply sewing machine oil according to your Sanhexin model’s lubrication schedule.

Tighten screws and check the user manual for maintenance intervals.

Sanhexin sewing machines are engineered for quiet, smooth operation—unusual noise often signals a need for maintenance.

7. Error Codes on the Display

Possible Causes:

Sensor malfunction

Bobbin winder issue

Thread jam or timing problem

Troubleshooting Steps:

Refer to your Sanhexin user manual to identify the specific error code.

Most minor issues (e.g., E1, E2 errors) can be resolved by turning the machine off, removing the bobbin, and clearing any jams.

For persistent or unknown error codes, contact Sanhexin’s service team for software diagnostics and repair options.

Preventive Maintenance Tips

To minimize the chances of breakdown and ensure your computerized sewing machine operates at peak performance, follow these guidelines:

Clean after each project: Dust and thread build-up can cause serious issues.

Oil as recommended: Follow your Sanhexin manual for oiling frequency and oil type.

Use the right accessories: Only use Sanhexin-approved bobbins, feet, and attachments.

Update firmware regularly (if supported).

Schedule professional servicing at least once a year, especially for high-volume users.

Why Choose Sanhexin Computerized Sewing Machines?

Sanhexin is committed to engineering excellence and user satisfaction. Each machine is designed with:

User-friendly digital interfaces

Precision stitching mechanics

Long-lasting components

Robust quality control

OEM and ODM support for business clients

From home sewing enthusiasts to industrial production lines, Sanhexin provides sewing solutions that meet the demands of modern fabric craftsmanship.

Final Thoughts

Computerized sewing machines offer outstanding functionality, but like all advanced tools, they benefit from proper care and a basic understanding of troubleshooting. By identifying common problems and knowing how to resolve them, you can keep your Sanhexin sewing machine in top condition for years to come.

Whether you’re stitching a delicate embroidery pattern or powering through heavy denim seams, reliability starts with the right machine—and the right support.

http://www.bedoly.net
Ningbo Sanhexin Automation Co., Ltd.

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