Duerkopp Adler 171 Operating Instructions Manual - Page 4
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2. Machine elements and their functions
2.1 Elements at the machine head
Element
Hand lever 1
Screw 2
Oil check tube 3
Dial 4
Needle thread puller 5
(Only subclass -141521)
Needle thread tension 6
Looper thread tension 7
Oil reservoir 8 with
inlet opening
Dial 9
Looper thread puller 10
(Only subclass -141521)
Release lever 11 for
the thread tensions
Thread guide 12
Needle 13
Thread regulator 14
Locking button 15
6
Function
–
Swinging up the puller. It is swung out of the working
area.- Sewing with bottom feed only.
–
Regulating the sewing foot pressure depending on the
material.
–
Monitoring the oil circulation for the lubrication of the
front arm shaft bearing. The oil flow must not be
interrupted while the machine is running. If necessary,
check the oil level in the reservoir 8 or top up with oil.
Only ESSO SP-NK 10 or an oil of the same quality
must be used.
–
Feeding length for the top feed puller.
–
Initial thread for the stitch formation at the seam
beginning after the threads are trimmed.
–
One revolution of the turning button with numerals
covers the entire tension range. Thus, the tension
values can be easily reproduced.
–
Same as 6, but with a weaker tension spring.
–
The oil level must not drop below "MIN". If necessary,
top up with ESSO SP-NK 10 oil to "Max".
–
Setting the stitch length for the bottom feed.
–
Initial thread for the stitch formation at the seam
beginning after the threads are trimmed.
–
Pulling out the threads by hand, eg when threading
–
Basic adjustment centre of the elongated hole.
–
System 934 SIN or 933.- Needle sizes Nm 80-130
depending on the sewing equipment (E-Nr.).
To exchange the needle, always turn off the
main switch! - Danger of injury!
–
For secure stitch formation in the case of elastic
threads, such as eg synthetic spun threads and
monofilament threads. For the adjustment see
section 3.4.
–
Locking the foot in its lifted position.