21. Thread controller spring
Caution: Danger of injury !
Switchthemainswitchoff.
Adjust the thread controller spring only with the machine switched off.
Standard checking
The thread controller spring 1 must hold the hook thread tensioned
until the needle with the needle thread has accurately penetrated the
triangle formed by the spreader.
–
Insert and clamp the material.
–
Turn the machine manually and check whether the thread
controller spring tightens the hook thread firmly and long enough.
Correction of the spring travel
–
Loosen screw 4.
–
Adjust the stop disc 3.
Disc to the right = longer spring travel
Disc to the left = shorter spring travel
–
Tighten screw 4.
Correction of the spring tension
–
Loosen screw 5.
–
Adjust the tension bolt 2.
Bolt to the right = higher tension
Bolt to the left = lower tension
–
Tighten screw 5.
46
1 54 3 2
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