Duerkopp Adler 173 Operating Instructions Manual page 6

Element
Key 17
Key 18
Key 19
Key 20
Control panel 21
(Only subclasses -141521
and -161120)
Knee lever 22
Infrared reflecting
light barrier 23
Looper drive housing 24
Looper thread take-up 25
8
Function
–
Undefined
–
Single stitches
–
Needle up or down at machine standstill. During
sewing condensed stitches may be sewn anywhere wit-
hin the seam.
–
Raising or lowering the puller.
–
See instructions of the motor manufacturer.
Note: To enable thread trimming on the subclass -
141521, not only the key "thread trimming", but also
the key "thread wiping" at the control panel must be
always switched on. Diodes a and b must be luminous.
–
Prior to tilting the machine head backwards, TURN
OFF the main switch and remove the knee lever. To un-
hook, make the motions 1 and 2 and to hook up, make
the motions 3 and 4.
–
To sense the fabric edge and thus, the correct
position of the condensed stitches at the seam end.
–
With the machine head tilted backwards the oil level
must not drop below the lower long mark.
If necessary, turn out the screw 26 and top up with oil
ESSO SP-NK 10. The oil must just be filled up to the
upper mark.
–
It automatically adjusts the amount of looper thread to
the set stitch length.
For adjustments for tight, regular or highly elastic
seams see section 3.5.