Tajima Embroidery Machine: Needle Breaking Troubleshooting Guide

1. Bent or Worn-Out Needle high likelihood

How to tell

Visually inspect the needle point for dullness, burrs, or a bent shaft. A worn needle may also cause skipped stitches before breaking. Run a finger gently along the needle shaft (away from the point) to feel for any roughness or bends.

Fix

1. Turn off the machine power.
2. Loosen the needle clamp screw using the appropriate screwdriver.
3. Carefully remove the old needle.
4. Insert a new, correct type and size needle into the needle bar, ensuring the scarf (flat side) faces directly to the rear of the machine.
5. Push the needle up as far as it will go into the needle bar.
6. Tighten the needle clamp screw firmly, but do not overtighten.
7. Perform a test stitch on scrap fabric.

Always use high-quality needles designed for industrial embroidery machines.

Parts involved: Needles & needle bars →

2. Incorrectly Installed Needle high likelihood

How to tell

The needle may appear slightly angled, not fully seated, or the scarf (flat side) might not be facing directly to the rear. This can cause the needle to hit the rotary hook or presser foot.

Fix

1. Turn off the machine power.
2. Loosen the needle clamp screw.
3. Remove the needle.
4. Re-insert the needle, ensuring the scarf (flat side) faces directly to the rear of the machine.
5. Push the needle up as far as it will go into the needle bar until it bottoms out.
6. Tighten the needle clamp screw firmly.
7. Manually rotate the main shaft (hand wheel) slowly to observe the needle's path relative to the rotary hook and presser foot, ensuring no contact.

Parts involved: Needles & needle bars → Screws, springs & small parts →

3. Thread Path Obstruction or Tangling high likelihood

How to tell

Thread may be snagged in a guide, wrapped around a tension disc, or tangled in the take-up lever area. This creates excessive drag, pulling on the needle. You might observe inconsistent tension or thread shredding.

Fix

1. Turn off the machine power.
2. Remove the upper thread completely from the machine.
3. Inspect the entire thread path from the thread cone to the needle eye. Look for burrs, lint buildup, or bent thread guides.
4. Clean any lint or debris from thread guides and tension discs.
5. Re-thread the machine carefully, following the correct threading sequence as shown in your Tajima machine manual. Ensure the thread is seated correctly in all tension discs and guides.
6. Perform a test stitch to verify smooth thread flow.

Parts involved: Thread path & tension → Lubrication & maintenance →

4. Incorrect Thread Tension (Upper or Bobbin) high likelihood

How to tell

If upper tension is too high, the needle is pulled excessively. If bobbin tension is too high, the upper thread cannot pull the bobbin thread up correctly, causing resistance. Inspect the stitch quality on the underside of the fabric; loops or uneven stitches indicate imbalanced tension.

Fix

1. Perform a tension test stitch on scrap fabric.
2. Adjust the upper thread tension dials incrementally (usually counter-clockwise to loosen, clockwise to tighten). Start by loosening if the needle is breaking.
3. If upper tension adjustment doesn't resolve it, check bobbin tension. Remove the bobbin case and test its tension by holding the thread and letting the case hang; it should slowly drop a few inches with a slight tug. Adjust the small screw on the bobbin case if needed (small turns only).
4. Re-test after each adjustment until tension is balanced and stitches are even on both sides of the fabric.

Parts involved: Thread path & tension → Rotary hooks & bobbin cases →

5. Needle Hitting the Hoop or Presser Foot medium likelihood

How to tell

You will hear a distinct 'clunk' or 'thud' as the needle strikes the hoop frame or the presser foot. Visual inspection may show scrape marks on the hoop or presser foot, or a bent needle before it breaks.

Fix

1. Turn off the machine power.
2. Check the hoop for proper installation and secure clamping in the hoop arms. Ensure it is fully seated.
3. Verify the design is correctly positioned within the hoop boundaries using the trace function. Adjust the design position if it's too close to the hoop edge.
4. Ensure the presser foot height is correctly set for the fabric thickness. Refer to your machine manual for presser foot adjustment procedures.
5. Manually rotate the main shaft slowly to observe the needle's path relative to the hoop and presser foot, ensuring adequate clearance throughout the stitch cycle.

Parts involved: Hoops & frames → Presser feet & sewing parts →

6. Incorrect Needle Type for Fabric/Thread medium likelihood

How to tell

Needles may break frequently, especially on dense or thick materials, or when using thicker threads. The needle might struggle to penetrate the fabric, causing deflection.

Fix

1. Identify the fabric type and thickness, and the thread weight being used.
2. Consult a needle selection chart (often found in machine manuals or needle manufacturer guides) to choose the appropriate needle size (e.g., 75/11, 90/14) and point type (e.g., sharp, ballpoint).
3. Replace the current needle with the correct type and size.
4. Perform a test stitch on a scrap of the actual material.

Parts involved: Needles & needle bars → Threads & supplies →

7. Fabric Not Properly Stabilized or Hooped medium likelihood

How to tell

The fabric may pucker, shift, or not lie flat in the hoop. This allows the fabric to move excessively during stitching, causing the needle to deflect or get caught.

Fix

1. Remove the hoop from the machine.
2. Unhoop the fabric.
3. Select an appropriate stabilizer for the fabric type and design density. Use enough layers if necessary.
4. Re-hoop the fabric and stabilizer together, ensuring the fabric is taut like a drum, smooth, and free of wrinkles. Avoid over-stretching knit fabrics.
5. Ensure the hoop is securely clamped into the machine's hoop arms.
6. Perform a test stitch.

Parts involved: Hoops & frames → Threads & supplies →

8. High Sewing Speed for Design Complexity medium likelihood

How to tell

Needles tend to break more often during intricate details, dense areas, or when stitching through multiple layers at high speeds. The machine may sound strained.

Fix

1. Reduce the machine's sewing speed, especially for complex designs, dense stitch areas, or when working with challenging fabrics.
2. Adjust the speed setting on the control panel to a lower RPM.
3. Monitor the stitching process and increase speed gradually only if no issues occur.