26 BA_310D-R_3100D-R_A16-3_180117_en
Fig. 14
4.9 Interval gear
The interval 1:2 or 1:3 guarantees an elastic seam almost free of marking with
extremely difficult to work fabric qualities.
The principle of the interval is based on the repeat of a different plunger height,
which always remains the same with the individual penetrations of the needle.
We use it with two different machine types:
a) Needle lever with radial movement.
The needle stitches the outside or upper fabric with each second (1:2) or
third (1:3) rotation of the machine. With the other rotations the penetration
is carried out only in the upper fabric layers.
b) Needle lever with radial and pendulum movement.
The interval 1:2 enables the needle in each case to make a right (in the
upper fabric) and a left (in the inside lining) penetration
The difference of the plunger height between the individual stitches is partly
fixed set or stepless adjustable from 0 to + (=maximum approx. 0.2 mm).
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