Innov-is F420

FAQs & Troubleshooting

FAQs & Troubleshooting

Combination of fabric, thread and needle

navi About the Needle

navi Checking the needle

navi Fabric / Thread / Needle Combinations

 

About the Needle

 

  1. Needles that can be used with this machine: Home sewing machine needles (size 65/9 - 100/16)
    •  The larger the number, the larger the needle. As the numbers decrease, the needles get finer.
  2. Thread that can be used with this machine: 30 - 90 weight
    • Never use thread of 20 weight or lower. It may cause machine to malfunction.
    • The smaller the number, the heavier the thread. As the numbers increase, the thread gets finer.
  3. The machine needle and thread that should be used depends on the type and thickness of the fabric. Refer to the following table when choosing the thread and needle appropriate for the fabric that you wish to sew
    • The combinations shown in the table provide a general guideline. Be sure to sew trial stitches on the actual number of layers and type of fabric to be used in your project.
    • The machine needles are consumables. For safety and best results, we recommend replacing the needle regularly. For
      details on when to replace the needle, refer to Checking the needle.
  4. In principle, use a fine needle and thread with lightweight fabrics, and a larger needle and heavier thread with heavyweight fabrics.
     

  5. Select a stitch appropriate for the fabric, and then adjust the stitch length. When sewing lightweight fabrics, make the stitch length finer (shorter). When sewing heavyweight fabrics, make the stitch length coarser (longer).  When sewing stretch fabrics, refer to “Sewing stretch fabrics” in the operation manual.

 

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Checking the needle
  • Only use recommended home sewing machine needles. Use of any other needle may bend the needle or damage the machine.
  • Never use bent needles. Bent needles can easily break, possibly resulting in injuries.

Sewing with a bent needle is extremely dangerous since the needle may break while the machine is being operated. Before using the needle, place the flat side of the needle on a flat surface and check that the distance between the needle and the flat surface is even.

fig001

(1) Flat side        (2) Needle type marking

 

  • If the distance between the needle and the flat surface is not even, the needle is bent. Do not use a bent needle.
    image

    (1) Flat surface

  • Replace the needle in cases such as the four described below:
    1. If an unusual sound is produced when the needle enters the fabric while sewing trial stitches at low speed. (The tip of the needle may be broken.)
    2. If stitches are skipped. (The needle may be bent.)
    3. After completing one project, such as a piece of clothing.
    4. After using three full bobbins of thread.

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Fabric / Thread / Needle Combinations

 

The sewing machine needle that should be used depends on the fabric and thread thickness.
Refer to the following table when choosing the thread and needle appropriate for the fabric that you wish to sew.

 

Fabric Type/Application Thread Size of Needle Stitch length
[mm (inch)]
Type Size
Lightweight
fabrics
Lawn, georgette, challis, organdy,
crepe, chiffon,voile, gauze, tulle,
lining, etc.
Polyester
thread
60 – 90 65/9 - 75/11 Fine stitches
1.8-2.5
(1/16-3/32)
Cotton thread,Silk thread
50 - 80
Medium weight
fabrics
Broadcloth, taffeta, gabardine,
flannel, seersucker, double gauze,
linen, terry cloth, waffle weave,
sheeting, poplin, cotton twill, satin,
quilting cotton, etc.
Polyester
thread
60 – 90 75/11 - 90/14 Regular stitches
2.0-3.0
(1/16-1/8)
Cotton thread,
Silk thread
50 - 60
Heavyweight
fabrics
Denim (12 ounces or more), canvas,
etc.
Polyester
thread,
Cotton thread
30 100/16 Coarse stitches
2.5-4.0
(3/32-3/16)
Denim (12 ounces or more), canvas,
tweed, corduroy, velour, melton
wool, vinyl-coated fabric, etc.
Polyester
thread
60 90/14 - 100/16
Cotton thread,
Silk thread
30 - 50
Stretch fabrics
(knit fabrics, etc.)
Jersey, tricot, T-shirt fabric, fleece,
interlock, etc.
Cotton thread,
Polyester thread,
Silk thread
50 Ball point needle
75/11 – 90/14
Setting appropriate for
the fabric thickness
For top-stitching Polyester thread,
Cotton thread
30 90/14 - 100/16 Setting appropriate for the fabric thickness
50 –60 75/11 - 90/14

 

  • Transparent nylon thread
    Use a home sewing machine topstitching needle, regardless of the fabric or thread.
  • Embroidery needles (Embroidery only)
    Use a 75/11 home sewing machine needle for embroidery.
  • The appropriate fabric, thread and needle combinations are shown in the preceding table. If the combination of the fabric, thread and needle is not correct, particularly when sewing heavy fabrics (such as denim) with thin needles (such as 65/9 to 75/11), the needle may bend or break. In addition, the stitching may be uneven or puckered or there may be skipped stitches.

 

 

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