2.5 Bobbin case lifter
2.5.1 General information
The thread take-up lever should pass the thread between the bobbin
case 4 and its support 3. For ensuring a free thread passage, the
bobbin case must be lifted in this moment by the bobbin case lifter.
This will ensure the desired seam pattern with the lowest possible
thread tension.
Wrong adjustments may have following effects:
–
Thread breakage
–
Eyelets on the fabric underside
–
High noise level
2.5.2 Amount of the finger travel
Caution: Danger of bodily injuries !
The machine must be in the position "Safe motor stop ".
Rule and control
The support of the lever 5 should be eccentric. This will be ensured
when the nut 2 is flush with the outer edge of the shaft.
–
Lower the sewing head by the function "
Lifting/lowering the
sewing head
".
–
Press the key "
O
".
"Safe motor stop " will be switched on.
Correction
–
Loosen the nut 2 by the special spanner 1and change the
eccentricity accordingly.
–
Tighten the nut 2.
Note
Following a correction, check the travel amount and the travel moment.
3 4 5
1
2
20
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