Tajima Embroidery Machine Stops or Won’t Sew: Troubleshooting Guide

1. Thread Breakage or Thread Sensor Activation high likelihood

How to tell

The machine will stop, often displaying a 'Thread Break' or 'Upper Thread Error' message on the control panel. Visually inspect the upper thread path from the cone to the needle, and check the bobbin thread for any breaks or tangles. Sometimes, a sensor is tripped by a loose thread or lint, even without a full break.

Fix

1. Carefully inspect the entire upper thread path for breaks, tangles, or snags, including the thread cone, pre-tensioners, tension discs, thread guides, and take-up lever.
2. Check the bobbin thread for breaks or improper winding.
3. Remove any broken thread pieces from the machine.
4. Re-thread the machine completely, following the exact threading path shown in your Tajima machine's operator manual. Ensure the thread is seated correctly in all guides and tension discs.
5. If the issue persists and no thread break is visible, clean the thread sensor eyes with a soft brush or compressed air. Refer to your machine's manual for sensor locations and adjustment procedures if sensitivity is suspected.

Ensure you are using good quality thread appropriate for your machine and design.

Parts involved: Thread path & tension → Sensors & switches → Threads & supplies →

2. Empty or Improperly Wound Bobbin high likelihood

How to tell

The machine stops, and upon inspection, the bobbin is empty or nearly empty. The lower thread may be missing from the embroidery, or the machine may display a 'Bobbin End' or 'Lower Thread Error' message.

Fix

1. Remove the bobbin case and check the bobbin. If it's empty, replace it with a full bobbin.
2. If the bobbin is not empty, check if it's wound correctly and evenly. Unevenly wound bobbins can cause tension issues or snagging.
3. Ensure the bobbin is inserted into the bobbin case with the thread unwinding in the correct direction (usually clockwise for most Tajima rotary hooks).
4. Reinsert the bobbin case securely into the rotary hook assembly.

Parts involved: Rotary hooks & bobbin cases → Threads & supplies →

3. Needle Issues (Bent, Dull, Wrong Type, or Improperly Installed) high likelihood

How to tell

Skipped stitches, poor stitch quality, thread breaks, fabric damage, or the machine stopping abruptly. Visually inspect the needle for any bends, burrs, or a dull tip. Check its orientation.

Fix

1. Turn off the machine power.
2. Loosen the needle clamp screw and remove the current needle.
3. Inspect the needle for any signs of damage (bend, burr, dull tip). If any damage is present, replace it.
4. Ensure you are using the correct needle type and size for your fabric and thread combination, as specified in your machine's manual or design guidelines.
5. Insert a new, correct needle all the way up into the needle bar, ensuring the flat side of the needle shank faces the correct direction (typically directly backward, but confirm with your machine's manual).
6. Tighten the needle clamp screw securely, but do not overtighten.

Parts involved: Needles & needle bars →

4. Clogged Bobbin Area or Needle Plate high likelihood

How to tell

Machine stops, unusual noises, skipped stitches, or poor stitch quality. Visible accumulation of lint, dust, or stray thread bits around the bobbin case, rotary hook, or under the needle plate.

Fix

1. Turn off the machine power.
2. Remove the needle plate (usually two screws) and the bobbin case.
3. Using a small brush (like a stiff paintbrush or the one supplied with your machine) and/or compressed air, thoroughly clean out all lint, dust, and thread debris from the bobbin area, rotary hook, and under the needle plate.
4. Inspect the rotary hook for any nicks or burrs that could snag thread. If found, these may need professional attention or replacement.
5. Reinstall the bobbin case and needle plate securely.

Parts involved: Rotary hooks & bobbin cases → Screws, springs & small parts → Lubrication & maintenance →

5. Incorrect Thread Tension medium likelihood

How to tell

Loops on the top or bottom of the fabric, skipped stitches, frequent thread breaks, or puckering. The machine may stop due to repeated thread breaks or sensor activation.

Fix

1. Run a test stitch on a scrap piece of the same fabric and stabilizer.
2. Examine the test stitch. If the upper thread is too loose, adjust the upper tension dial (usually numbered) incrementally tighter. If the bobbin thread is too loose (loops on top), adjust the bobbin case tension screw (small flathead screw on the bobbin case) incrementally tighter. Refer to your machine's manual for recommended tension settings.
3. Adjust both upper and bobbin tensions until the stitches are balanced, with no loops and the bobbin thread showing approximately 1/3 on the underside of the fabric.
4. Ensure all thread guides are clean and free of lint, as this can affect tension.

Parts involved: Thread path & tension →

6. Improper Hooping or Fabric Slippage medium likelihood

How to tell

The machine stops, often with a 'Frame Error' or 'Hoop Collision' message. The fabric may appear loose or wrinkled within the hoop, or the design may be distorted.

Fix

1. Remove the hoop from the machine.
2. Ensure the fabric is hooped tautly and evenly, without wrinkles or slack. The fabric should feel like a drumhead.
3. Use an appropriate stabilizer for your fabric type and design density. Ensure the stabilizer is also hooped securely with the fabric.
4. Check the hoop tension screw; tighten it if the fabric feels loose in the hoop.
5. Reattach the hoop to the machine, ensuring it is seated correctly and locked into place.

Parts involved: Hoops & frames → Threads & supplies →

7. Machine Overload or Overheating low likelihood

How to tell

The machine stops after extended periods of high-speed operation. The motor housing or head may feel warm to the touch. Some machines may display an 'Overheat' error.

Fix

1. Turn off the machine and allow it to cool down for at least 30-60 minutes.
2. Avoid running the machine at its absolute maximum speed for very long, continuous periods.
3. Ensure the machine has adequate ventilation around it.
4. If overheating is frequent, ensure the machine's internal cooling fans (if applicable) are clean and operational. This may require technician inspection.

Parts involved: Motors & drivers → Lubrication & maintenance →

8. Electrical Issues or Power Supply low likelihood

How to tell

The machine stops abruptly, loses power, or fails to turn on. Lights may flicker, or other electrical devices on the same circuit may be affected.

Fix

1. Check that the machine's power cord is securely plugged into both the machine and a working wall outlet.
2. Ensure the wall outlet is providing power (test with another appliance).
3. Inspect the power cord for any visible damage or frayed wires.
4. If using an extension cord or power strip, ensure it is rated for the machine's power requirements and is not overloaded.
5. If the machine consistently shuts down or experiences intermittent power loss, it indicates a deeper electrical issue that requires a qualified technician.

Parts involved: Cables & wiring → Circuit boards & electronics →

9. Software or Design Errors low likelihood

How to tell

The machine stops at a specific point in a design, often displaying a 'Data Error', 'Design Error', or 'File Corrupt' message. It may work fine with other designs.

Fix

1. Ensure the embroidery design file is compatible with your Tajima machine model and is in the correct format (e.g., .DST).
2. Try reloading the design file from the USB or network source.
3. If possible, try a different, known-good design file to isolate if the issue is with the specific design.
4. If the design was created or edited recently, try re-exporting it from your digitizing software.
5. Ensure your machine's firmware is up to date (check your manual for instructions).

Parts involved: Control panels & displays → Floppy, USB & memory →

10. Automatic Stop Settings low likelihood

How to tell

The machine stops predictably at certain points, such as after a color change, a specific number of stitches, or when a 'stop code' is encountered in the design, without any error message indicating a fault.

Fix

1. Access the machine's settings menu (refer to your manual for navigation).
2. Review any 'Automatic Stop', 'Color Change Stop', or 'Pattern End Stop' settings.
3. Ensure these settings are configured as desired. You may need to disable or adjust them if they are causing unnecessary stops.
4. Check the design file itself for any embedded stop codes that might be causing the machine to pause.

Parts involved: Control panels & displays →