Diagnose Common Issues

Start by identifying the problem: Is it skipping stitches, tangling thread, or not sewing at all? Ensure the machine is clean and unplugged if electric.

Basic Troubleshooting Steps

• Check Threading: Verify correct upper and lower threading paths. Refer to the manual; rethread both needle and bobbin if frayed or misaligned.
• Inspect Needle: Replace a bent or dull needle, aligning it flat-side toward the back. Use needles sized universal 14/90 for general fabrics.
• Adjust Tension: Balance upper and bobbin tensions. Rotate tension discs clockwise for tighter or counter-clockwise for looser, ensuring smooth flow without puckering.
• Clean Lint: Remove dust and lint build-up under the needle plate, shuttle hook, and feed dogs using a brush or compressed air. Re-oil joints with sewing machine oil sparingly.

Mechanical Adjustments

• Test Belt and Motor: Ensure the drive belt is tight and not cracked. For electric models, hand-turn the wheel to check motor engagement; grease gears if stiff.
• Verify Feed Dogs: Ensure feed dogs are raised and moving fabric evenly. Lower them if jammed; clean or realign as needed.
• Shuttle Hook Issues: Examine the shuttle for burrs or timing issues. Rotate the hand wheel slowly to sync needle and shuttle; file any rough edges gently.

When to Seek Help

If problems persist after these steps, consult a professional technician. Avoid forcing parts to prevent damage.