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3.4 Front and rear guides of needles
3.4.1 Description
The front guide (1) and the rear guide (2) are used together
for stitch widths of a tandem arrangement.
With the sewing
categories 300 and 400, it is possible to replace these guides
by one guide (4) /the rear guide and the side guide in one
guide/.
For stitch widths with needles side by side, the rear guide (3)
is used only. All guides serve for holding the sewn material
against the throat plate. In addition to this, they contribute to
a as well and protect the needles in guiding them into the
piercing holes.
3.4.2 Setting the front guide
The front guide is universal for tandem stitch widths and for
all categories of sewing. It should be set in such a way that,
from the point of view of the operator, it protects the right
needle from the left-hand side. In the that, when backward
stitching, it could not negatively influence the stitch locking.
Its correct height is set up according to the sewn material
1-2 mm above the bottom edge of the feeding wheel. For
harder materials, it is set a bit lower and inversely.
Caution! Danger of injury!
Switch off the main switch! Before starting the
setting operation, wait until the motor stops!
- Loosen the screw (4) and set the correct height of the guide
(1). Tighten then the screw.
- Loosen the screw (5) and set the guide (1) in the direction
of sewing in front of the left needle at the moment, when
the needle starts piercing the material and set, at the same
time, the side clearance between the guide and the right-
hand needle, tighten then the screw.
- Check up the influence of the setting on the stitch locking.
3.4.3 Setting the rear guide
For different stitch widths of needles there is always used, for
all sewing categories, the respective guide (in each sewing
set there is supplied a corresponding guide). The rear guide
protects the left needle from the right-hand side. It is to be set
in such a way in the direction of sewing that it favourably
influences the stitch locking even when sewing the radii. Its
correct height is set 1-2 mm above the bottom edge of the
feeding wheel, namely according to the hardness of the sewn
material.
Caution! Danger of injury!
Switch off the main switch! Before starting the
setting operation, wait until the motor stops!
- Loosen the screw (6) and set the guide (2) in the direction
of sewing behind the right needle at the moment when the
needle leaves the sewn material, tighten up the screw.
- Loosen the screws (7) and set the guide in its correct height
and, at the same time, set the side clearance between the
guide and the left needle, tighten up the screw.
- Check up the influence of setting on the stitch locking.
1
4
5
6
2
7
1
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3
4
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