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3) Start and End Backtack Stitch Correction Method
※ Since backtack stitches may vary according to the type of sewing machine, use the following stitch correction method.
※ To adjust the stitch fast and clean, users should check the stitch condition before commencing the correction.
① Classification according to backtack sewing condition
※ The backtack sewing condition can be classified as follows (When A: 3 stitches, B: 3 stitches, C: 3 stitches, D: 3 stitches)
A. When one more or less stitch than the set stitch number is sewn
B. When one more or one less stitch is sewn than the programmed stitch number
Classification
Sewing condition where few backtack
Correct backtack sewing condition
Sewing condition where more
stitches are sewn backtack stitches are sewn
When sides A and B each have When sides A and B each have 3 When sides A and B each have
one less stitch sewn stitches correctly sewn one more stitch sewn
When sides C and D each have When sides C and D each have 3 When sides C and D each have
one less stitch sewn stitches correctly sewn one more stitch sewn
Start backtack
Sewing condition
End backtack
Sewing condition
Classification
B/T condition where the stitch length
Correct B/T sewing condition
comes out shorter
When the length of the last three stitches When sides A and B have 3 When sides A and B each have 3 stitches
in sides A and B have been sewn short. stitches correctly sewn.
and a half stitch (or less than one stitch) sewn
When the length of the first stitch in sides When the sides of C and D have 3 stitches
When the sides of C and D each have 3 stitches
C and D have been sewn short. correctly sewn
and a half stitch (or less than one stitch) sewn.
Start backtack
Sewing condition
End backtack
Sewing condition
Caution
The figures above show each representative sewing condition. And there may be some differences according to the
conditions of the sewing machine and it is normal that two types of conditions occur at the same time.
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