How To Sew with Twin or Double Needles
When sewing clothes, you often need to make the double finishing stitches. Instead of twice doing a straight line, you can use a double (twin) needle.
The use of a double needle has its own peculiarities, especially when sewing stretch fabrics.
Here are tips for how to use a twin or double needle on sewing machine. With double needle you can sew stretch, knit fabrics and make decorative stitches also.
The sewing machines that can sew with double needle have an additional spool pin for the coil.
Before buying a twin needle you need to know that these types of needles come in different sizes and have different distance of 4 mm between both (or three) needles. The twin needle having mark 3/80 has size 80 and 3 mm is between both needles.
Remove the usual needle and set twin needle. A long groove along the needle should be pointed towards you, just like regular needles.
Pass the double thread through thread guide by pulling the thread through the guide and towards you.
You need insert the double thread in the tension discs, and then back up towards the top along the second thread guide.
Now you need insert the right thread into right spring hook and left thread in the left spring hook.
Thread the twin needle using same rule.
At the bottom of the seam there will be one thread. So you do not need to change anything on the bobbin case. In rare cases, it is necessary to slightly strengthen or loosen the tension of the lower thread.
Now you need to pull out the bobbin thread, as shown.
When sewing with a double needle set the straight stitch.
Note: If you select on sewing machine zigzag stitch double needle may be bent or break.
So is formed stitch when is used two needles.
This is how the stitch looks from the back side.
Note: The distance between both needles must be narrow than slit width of needle plate.
Most sewing machines can work with a double needle, but if the needle plate has a narrow slit instead of a small circle hole for the passage of a needle.
Sewing machines performing only one straight stitch cannot sew with a double needle. For example, Typical industrial sewing machine or Older sewing machine Singer.
English isn't my first language, so please excuse any mistakes and help correct them.
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