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IMPORTANT ADJUSTMENTS TO BE MADE AFTER THE
REASSEMBLY OF THE UPPER GROUP OF THE ZIG
ZAG MECHANISM 50
MINOR ADJUSTMENTS IN THE UPPER GROUP OF THE
ZIG-ZAG MECHANISM 51
THE FEED DOG 54
- Adjustment of any Looseness in the Feeding Mecha-
nism 55
- Adjusting the Height of Teeth of the Feed Dog above
the Needle Plate 55
- Alignment of Feed Dog in relation to the slots in the
Needle Plate 58
- How to check the alignment between the underside
of the presser foot and the teeth of the feed dog . . 60
5 - Minor adjustments of the Feed Dog 62
HOW TO CONTROL THE PRESSURE OF THE PRESSER
FOOT 62
- Positioning of presser bar and presser foot . . . 63
- Height of Presser Foot 64
UPPER THREAD TENSION 66
- The Thread Take-Up Spring (Check Spring) of the
Upper Tension 67
- Positioning of the Tension Mechanism in relation to
the Hole in the Arm 69
- Tension of the lower Thread (tension of the Bobbin
Case) 70
THE OSCILLATING SHUTTLE 71
TO REMOVE THE FEED ECCENTRIC CONNECTING ROD
N° D 85506 AND THE CONNECTING RODS OF THE
STITCH LENGTH REGULATION MECHANISM
(Figs. 74 and 75) 74
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