Setting The Needle Punch Into The Middle Of The Needle Groove In The Throat Plate In Longitudinal Direction; Setting Of The Needle Punch Into The Middle Of The Needle Groove In The Throat Plate In Transversal Direction; Setting Of The Zigzag Stitch Shifting - Duerkopp Adler 527 Instructions Manual

15. Setting the needle punch into the middle of the needle groove in the throat plate in longitudinal direction

(Fig. 5)
Caution! Danger of injury!
Switch off the main switch! Before starting the setting operation, wait until the motor stops!
This setting is to be done after having set the zero zigzag stitch. In turning the hand wheel set the needle bar with the needle into
its bottom position. The needle is to stand in the middle of the needle groove both in the longitudinal and in the transversal
direction. When this is not so in the longitudinal direction (in the direction of feeding the sewn material), remove the front guard
after having unscrewed two fastening screws and loosen the securing screws (2) and (3). Now it is possible, by a fine turning of
the screws (4) on the front and on the rear side of the arm, to set the needle into the middle of the groove in the throat plate in
the longitudinal direction Tighten thereafter the screws (2) and (3) and proceed to the mounting of the front guard.
Notice!
When setting the needle position in the throat plate, not tighten fully the adjusting screws (4). Between these screws and the
needle bar holder there must be let a minimum clearance, so that the side movement of the needle bar holder with the zigzag stitch
is without any resistance. Without observing the necessary clearance between the adjusting screws (4) and the needle bar holder
the mechanism may be damaged. Check up the space between the hook point and the needle.

16. Setting of the needle punch into the middle of the needle groove in the throat plate in transversal direction

(Fig. 15, 16)
Caution! Danger of injury!
Switch off the main switch! Before starting the setting operation, wait until the motor stops!
This setting is to be done after having set the zero zigzag stitch. In turning the hand wheel set the needle bar with its needle in its
bottom position. The needle should stand in the middle of the needle groove both in the transversal and in the longitudinal
direction. When it is not so, remove the guard (1) from the front part of the arm after having unscrewed the screw (2) and the plug
from the rear opposite part of the arm. Loosen thereafter both screws (3) and set the complete needle bar holder (4) in such a way,
so that the needle is in the middle of the groove of the throat plate in transversal direction. After having set this, tighten the screws
(3) and proceed to the mounting of the guard and the plug. Check up the needle punch with the maximum stitch width and bear
in mind to have a clearance between the needle and the groove side in both needle positions. When turning the hand wheel and
with the set zero zigzag stitch, the needle bar with the needle should not perform any side movement. If it is so, then it is necessary
to set the basic zero position of the driving mechanism of the zigzag stitch. But this setting is of a larger extent, it needs more time
and is to be done by a mechanician with a good knowledge of the machine having some practice in the sewing machines line.
17. Setting of the zigzag stitch shifting (Fig. 17)
Caution! Danger of injury!
Switch off the main switch! Before starting the setting
operation, wait until the motor stops!
With the correctly set up machine, the needle bar shifts with the maximum
zigzag stitch width at the moment, when the needle is about 4 mm above
the throat plate and its path (shifting) is symmetrical against the axis of
the groove in the throat plate. Proceed to the necessary setting after
having unscrewed four screws (6) and after having removed the guard
(1). Loosen the screws (2) of the toothed wheel (3) on the upper shaft
(4). Turn the hand wheel and change the mutual position of the upper
shaft (4) and the wheel (3). After having moderately tightened check the
needle shifting. After having attained the correct needle shifting tighten
the screws (2) and proceed to the mounting of the guard.
3
2
4
1
Fig. 15
6
3
1 5
6 4 3
Fig. 16
2
Fig. 17