Sewing with knit fabrics can be challenging, even for experienced sewists. Today we are focusing on troubleshooting "Skipped Stitches".
Skipped Stitches
Problem Description:
When sewing knits, you might notice gaps in your stitching where the machine has failed to form proper stitches. This creates an inconsistent, weak seam that can potentially fall apart.
Common Causes:
- Wrong needle type
- Dull needle
- Incorrect tension
- Inappropriate stitch length
- Machine timing issues
- Incompatible thread weight
- Incorrect needle size for fabric weight
- Poor thread quality
- Dirty machine
Comprehensive Solutions:
a) Needle-Related Solutions:
Switch to appropriate needle type:
- Use ballpoint/jersey needles for stable knits
- Use stretch needles for highly elastic fabrics
- Use twin stretch needles for decorative topstitching
- Replace with fresh needle every 6-8 hours of sewing
Match needle size to fabric weight:
- 70/10 for lightweight knits (silk jersey)
- 75/11 or 80/12 for medium-weight knits (t-shirt jersey)
- 90/14 for heavyweight knits (sweater knits)
b) Machine Settings Adjustments:
Adjust upper tension:
- Start by loosening tension slightly (decrease by 0.5-1)
- Test on scraps and adjust incrementally
Modify stitch length:
- Increase stitch length slightly (2.5-3mm)
- Shorter stitches may cause fabric to bunch
Reduce sewing speed:
- Sew at medium speed for better stitch formation
- Very slow or very fast speeds can cause problems
c) Thread-Related Solutions:
Use quality thread:
- Choose polyester thread for stretch
- Avoid old or brittle thread
- Match thread weight to fabric weight
Check thread path:
- Rethread machine completely
- Ensure thread is seated properly in tension discs
- Check for proper bobbin installation
d) Presser Foot Adjustments:
Reduce presser foot pressure:
- Start by reducing pressure by 25%
- Test and adjust until fabric feeds smoothly
Use appropriate presser foot:
- Walking foot for thick or slippery knits
- Teflon foot for sticky knits
- Jersey foot for fine knits
e) Machine Maintenance Solutions:
Clean the machine:
- Remove lint from bobbin area
- Clean between tension discs
- Oil machine if recommended by manufacturer
Check timing:
- Ensure needle and hook timing is correct
- Have professional service if timing is off
f) Stabilisation Techniques:
Use stabilisers:
- Apply wash-away stabiliser under problem areas
- Use tear-away stabilizer for seams
- Consider using knit interfacing for areas prone to skipping
Tissue paper method:
- Place tissue paper under fabric while sewing
- Tear away after stitching
Example Applications:
Light Jersey T-Shirt:
- Use 70/10 stretch needle
- Polyester thread
- Tension at 4
- Stitch length 2.5mm
- Medium presser foot pressure
Athletic Wear with Spandex:
- Use 75/11 or 80/12 stretch needle
- Walking foot
- Reduced presser foot pressure
- Stabiliser under seams
- Slightly loosened tension
Sweater Knit Cardigan:
- Use 90/14 ballpoint or jersey needle
- Extended stitch length (3mm)
- Walking foot
- Reduced speed
- Test on scraps extensively
Preventive Measures:
Before Starting Project:
- Test all settings on fabric scraps
- Check needle condition
- Clean machine thoroughly
- Ensure proper threading
During Sewing:
- Monitor stitch formation
- Listen for unusual sounds
- Check thread tension regularly
- Keep fabric flat and unstretched
Regular Maintenance:
- Change needles frequently
- Clean machine after each project
- Keep detailed notes of successful settings
- Store fabric and supplies properly
Troubleshooting Sequence:
If skipped stitches occur, follow this sequence:
- Change to new appropriate needle
- Rethread machine completely
- Adjust tension settings
- Clean machine thoroughly
- Modify stitch length
- Try stabilisation techniques
If problems persist, seek professional service.
Remember:
- Different knit fabrics may require different solutions
- Keep a record of successful combinations
- Always test on scraps before sewing actual garment
- Consider fabric weight and stretch percentage when choosing solutions
- Some trial and error may be necessary to find perfect settings
This section provides a comprehensive approach to dealing with skipped stitches, one of the most common issues when sewing knits. The detailed solutions and examples should help you identify and resolve the problem more effectively.
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