Needle Bar Height - Duerkopp Adler 550-867 Service Instructions Manual

2.6.2

Needle bar height

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5
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Caution: Risk of injury!
Turn off the main switch.
Check and set the needle bar height only when the machine is
switched off.
Standard checking
The needle bar' s height is to be set in a way that the hook tip stands
in the lower third of the needle scarf with the stitch length set to " 0 "
in the looping stroke position.
–
Set the stitch length to " 0" by aligning the markings 4 and 5.
–
Arrest the sewing machine in position I (looping stroke position).
–
Check the position of the needle in relation to the hook tip.
Correction
–
Set the stitch length to " 0".
4
–
Loosen the needle bar fastening screw 2.
–
Shift the needle bar 1 with needle 3.
Upon shifting the needle bar must not be turned.
The needle scarf must be directed to the hook tip.
–
Tighten the needle bar fastening screw.
A wrong setting of the needle bar height can have the following
consequences:
–
Damage on the hook tip.
–
Jamming of the needle thread between needle and needle guard.
–
Missed stitches and thread breakage.
ATTENTION!
After a correction of the needle bar height, the needle guard's position
has to be checked (see chapter 2.6.5).
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