Tajima TMAR-KC: Troubleshooting Puckering & Design Distortion

1. Incorrect Hooping or Hoop Condition high likelihood

How to tell

Fabric appears loose, wrinkled, or unevenly stretched within the hoop. The design may shift or distort during stitching. Hoops may be warped or have worn inner rings.

Fix

1. Remove fabric from the hoop.
2. Inspect the hoop for damage, warping, or if the inner ring is worn and no longer holds fabric securely. Replace damaged hoops.
3. Re-hoop the fabric ensuring it is taut, flat, and evenly stretched across the entire hoop area. Avoid over-stretching delicate fabrics.
4. Ensure the fabric grain is aligned with the hoop for consistent tension.
5. For slippery fabrics, use silicone hoop inserts or wrap the inner hoop with non-slip material.

Parts involved: Hoops & frames →

2. Inadequate Fabric Stabilization high likelihood

How to tell

Fabric stretches, puckers, or shifts excessively, especially with dense designs or stretchy materials. Stitches may sink into the fabric.

Fix

1. Select a stabilizer appropriate for the fabric weight and type, and the design's stitch density. Use cut-away for stretchy knits, tear-away for wovens, and water-soluble for delicate fabrics or toppings.
2. For dense designs or unstable fabrics, consider using multiple layers of stabilizer or a heavier weight stabilizer.
3. Ensure the stabilizer is larger than the hoop to provide full support.
4. Use temporary adhesive spray to bond the fabric and stabilizer together, preventing shifting.

Parts involved: Threads & supplies →

3. Imbalanced Thread Tension (Upper or Bobbin) high likelihood

How to tell

Upper thread visible on the underside, bobbin thread visible on the top, or loops forming. Fabric may pull or pucker unevenly along stitch lines. Test sew a satin stitch column: the top thread should meet the bobbin thread in the middle of the fabric thickness, with about 1/3 bobbin thread showing on the underside.

Fix

1. Thread the machine correctly, ensuring the upper thread passes through all guides and tension discs properly.
2. Clean any lint or debris from the upper tension discs.
3. Adjust the upper thread tension dial incrementally. Turn clockwise to increase tension, counter-clockwise to decrease.
4. Remove the bobbin case and inspect for lint, burrs, or damage. Clean thoroughly.
5. Check bobbin tension. If using a drop-in bobbin, ensure it spins smoothly but with slight resistance. For front-loading bobbin cases, use a bobbin tension gauge or the 'drop test' (bobbin case should slowly slide down the thread when held). Adjust the small screw on the bobbin case if needed.
6. Perform test stitches on scrap fabric after each adjustment until tension is balanced.

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

4. Incorrect Needle Type or Size medium likelihood

How to tell

Fabric damage (holes, runs), skipped stitches, thread breaks, or puckering around needle penetrations. Fabric may not lay flat after stitching.

Fix

1. Select a needle type appropriate for the fabric: Ballpoint (BP) for knits, Sharp (DB-K5) for wovens, Titanium (PD) for dense materials.
2. Choose a needle size appropriate for the fabric weight and thread thickness. Smaller needles (e.g., 65/9, 70/10) for fine fabrics, larger needles (e.g., 80/12, 90/14) for heavier fabrics or dense designs.
3. Ensure the needle is inserted correctly, fully seated, and facing the correct direction (scarf towards the hook).
4. Replace bent, dull, or burred needles immediately.

Parts involved: Needles & needle bars →

5. Excessive Stitch Density or Design Issues medium likelihood

How to tell

Fabric bunches or distorts in areas with very high stitch counts. Needle penetrations are extremely close together, causing fabric stress.

Fix

1. Review the embroidery design file in your digitizing software.
2. Reduce stitch density in overly dense areas. A common range is 4.0-5.0 stitches per millimeter, but this varies by fabric.
3. Apply appropriate pull compensation in the digitizing software to counteract fabric pull-in.
4. Simplify complex designs by removing unnecessary underlay or details that contribute to excessive stitch count.
5. If the design is not optimized for the fabric, consider professional digitizing services.

Parts involved: Floppy, USB & memory →

6. Incorrect Presser Foot Height or Condition low likelihood

How to tell

Fabric drags, bunches, or is not held flat during stitching. Presser foot may be visibly bent, worn, or set too high/low.

Fix

1. Inspect the presser foot for any damage, burrs, or excessive wear. Replace if necessary.
2. Check the presser foot height. It should lightly hold the fabric against the needle plate without excessive pressure or allowing the fabric to lift too much. Refer to your machine's manual for specific adjustment procedures, typically involving a set screw on the presser foot bar.
3. Ensure the presser foot is securely tightened and not loose.

Parts involved: Presser feet & sewing parts → Head & mechanical parts →

7. Worn or Misaligned Rotary Hook low likelihood

How to tell

Inconsistent stitch quality, skipped stitches, thread breaks, or unusual noise from the hook area. Fabric may pucker due to inconsistent loop formation. Inspect the hook point for burrs or damage.

Fix

1. Power off the machine.
2. Remove the needle plate and bobbin case.
3. Carefully inspect the rotary hook for any burrs, nicks, or damage, especially on the hook point. Use a magnifying glass if available.
4. If burrs are present, they can sometimes be carefully polished with very fine emery cloth, but replacement is often the best solution.
5. Check for excessive play in the hook assembly. If the hook is loose or misaligned, it will require precise timing adjustment by a qualified technician.
6. Replace severely worn or damaged rotary hooks.
7. Ensure the hook area is clean and properly lubricated.

Rotary hook replacement and timing adjustments are critical and often require a service technician.

Parts involved: Rotary hooks & bobbin cases → Lubrication & maintenance →