Tajima TMBR Series: Common Problems & Fixes Guide

1. Frequent Thread Breaks or Skipped Stitches high likelihood

How to tell

The machine stops unexpectedly during embroidery, displaying a thread break error, or stitches appear incomplete and uneven. You may see loose or tangled thread on the top or bottom of the fabric.

Fix

1. Check the thread path for any snags, tangles, or obstructions. Ensure thread is correctly seated in all guides and tension discs.
2. Inspect the needle for bends, burrs, or dullness. Replace the needle if any damage is found. Ensure the needle is inserted correctly with the scarf facing the rotary hook.
3. Adjust upper thread tension. If stitches are looping on top, increase tension; if looping on bottom, decrease tension. Check bobbin tension as well.
4. Clean the bobbin case and rotary hook area of any lint or debris. Ensure the bobbin is wound correctly and inserted properly.
5. Verify the presser foot height is appropriate for the fabric thickness. Too high or too low can affect stitch formation.

A bent or damaged needle bar can also cause repeated thread breaks and skipped stitches. Consider inspecting the Tajima EF053202S000 Needle Bar Reciprocator Assembly if issues persist after needle replacement.

Parts involved: Needles & needle bars → Thread path & tension → Rotary hooks & bobbin cases → Presser feet & sewing parts → Screws, springs & small parts →

2. Poor Stitch Quality (Looping, Puckering, Uneven Stitches) medium likelihood

How to tell

Embroidery appears messy, with loops visible on the top or bottom of the fabric, fabric gathering or puckering around the design, or stitches that are inconsistent in length or density.

Fix

1. Adjust both upper and bobbin thread tension. The goal is a balanced stitch where the bobbin thread appears as a thin line on the underside of the top stitching.
2. Ensure the fabric is hooped correctly – taut like a drum, but not stretched. Use appropriate backing for the fabric type and design density.
3. Change the needle. A worn or incorrect needle size/type can significantly impact stitch quality.
4. Clean the thread path, tension discs, and bobbin area thoroughly to remove any lint or debris that might be affecting thread flow.
5. Check the presser foot height and ensure it is not too high or too low for the material being embroidered.

Parts involved: Thread path & tension → Needles & needle bars → Hoops & frames → Rotary hooks & bobbin cases → Presser feet & sewing parts →

3. Machine Timing Issues (Needle Hitting Hook, Loud Noises) medium likelihood

How to tell

A distinct knocking sound during operation, repeated needle breaks, or the needle visibly hitting the rotary hook or needle plate. Machine may stop with a timing-related error code.

Fix

1. First, check for a bent or improperly inserted needle. Replace if necessary.
2. Inspect the needle bar height. If it's too high or too low, it can cause timing conflicts. Refer to your machine's manual for the correct setting and adjustment procedure.
3. Examine the rotary hook for damage or excessive wear. A burr or chip can interfere with the needle. Clean the hook area thoroughly.
4. Check the timing belts for wear, looseness, or damage. A stretched or broken belt can throw off machine timing. Inspect the W20-S5M0950/G Timing Belt and Tajima TU10 W25-170/E Timing Belt 626400260000 BPT102517000.
5. Inspect the timing pulleys for wear or looseness. The Tajima 501454040S13 W25-20 Timing Pulley should be securely fastened and free of damage.

Accurate timing adjustments often require specialized knowledge and tools. If you are unsure, it's best to consult a qualified technician. Components like the Tajima EF053202S000 Needle Bar Reciprocator Assembly may need replacement if severely damaged.

Parts involved: Needles & needle bars → Rotary hooks & bobbin cases → Belts, pulleys & gears → Head & mechanical parts → Shafts, bearings & bushings →

4. Machine Not Powering On or Intermittent Power low likelihood

How to tell

The machine does not turn on when the power switch is flipped, or it powers on and then unexpectedly shuts down. Control panel may be blank.

Fix

1. Verify the power cord is securely plugged into both the machine and a working electrical outlet.
2. Check the circuit breaker on the machine and at the electrical panel. Reset if tripped.
3. Inspect the power switch for any visible damage or looseness.
4. If the machine powers on intermittently or not at all, the power supply unit may be failing. Consider inspecting or replacing the Tajima PB0025A1PW00 Power Supply 150W 24V for TEHX-C1501, TMEZ, TMAR, TMBR-SC Embroidery Machines.

Electrical troubleshooting can be dangerous. Always ensure the machine is unplugged before inspecting internal components. If you suspect a faulty power supply, replacement is usually the most straightforward fix.

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