Duerkopp Adler 4280-6, Instructions For Service Manual

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7
3.3 Throat plate and its post
3.3.1 Description
The throat plate (1) is always for the given stitch width of
needles and universal for all respective categories of sewing
(see Tab. sewing equipments - Spare parts list).
In the throat plate there is mounted an exchangeable throat
plate insert (2). For each stitch width of needles, it is possible
to supply several throat plate inserts differing one from
another by the width of the piercing hole.
3.3.2 Side setting of the throat plate post and
setting of the needle bed shifting
The post of the throat plate (1) and the needle bed (2) are
to be set up one to the other in such a way, so that with the
given stitch width „A" there are the same distances „B" between
the edges of the piercing holes and the needles. The inserts
of the throat plates have got the distance of the axes „C" of
the piercing holes by 0.2 mm larger than the stitch width
of needles „A". The space „B" then will always be smaller than
the space „D".
Caution! Danger of injury!
Switch off the main switch! Before starting the
setting operation, wait until the motor stops!
- Loosen the screws (4) /from the rear side of the post too/.
- Shift the post (1) in the right direction in such a way that the
distances „B" are equal with both needles.
- Tighten up the screws (4) and check up the correctness of
setting.
- Loosen the screw (3) of the needle bar carrier.
- Shift the needle bed (2) in such a way, so that the required
stitch width of needles „A" is attained.
- Tighten up the screw (3) and check up the setting.
3.3.3 Setting the needle (the needle bar holder) in
the direction of sewing (fine setting)
The directions „E" between the needle and the edge of the
piercing hole must be the same both at the beginning and at
the end of the needle feeding.
Caution! Danger of injury!
Switch off the main switch! Before starting the
setting operation, wait until the motor stops!
- According to the table 11.3, limit the maximum stitch
length for the respective stich width and the sewing cate-
gory (see 3.5.2.4).
- Set the maximum stitch length.
- Loosen the screw (5) of the eccentric of the needle bar
holder.
- By turning the eccentric (6), set the required distance „E".
- Tighten up the screw (5) and check up the setting.
Caution!
A faulty setting may cause bending or breaking of
needles against the throat plate insert.
1
2
4
3
1
2
A
B
B
C
D
D
5
6
E
E