64
Adjusting the machine:
● Tilt the machine towards the rear.
● Disconnect spring 3 (fig. 80).
● Unscrew and remove screw 4.
● Turn the handwheel until the lobe of feed eccentric 5 is at the rear.
● Fold feed regulator 6 downward and remove it with link 7 to the left from feed bar pin.
● Check that the slide block can be moved easily without play or binding into the slotted lever.
If necessary, adjust according to section 2 a.
● Fold feed regulator 6 to the rear and then upward over feed eccentric 5.
● Insert screw 4 into clamping plate 21 and tighten just a little.
● Push pin 20 to the side until lever 7 and driving bar 19 still have a little play and move easily.
● Tighten screw 4.
● Attach spring 3.
● Loosen the three screws 29 in the lower flat-toothed belt sprocket 94.
● Bring the needle bar to its lowest position by turning the handwheel.
● Fit spacer (63-102 600-18) on the needle bar and push up against the needle bar frame.
● Push needle rise clamp (61-111 600-35) on the needle bar.
● Push 2 mm feeler gauge (00-870 136-01) with its cutout on the needle bar above the needle rise
clamp.
● Loosen the needle rise clamp and push the 2 mm feeler gauge upward against the spacer.
● Tighten the milled screw on the needle rise clamp.
● Turn the handwheel back and forth.
If there is any play at the feeler gauge, repeat this procedure.
● Remove the 2 mm feeler gauge.
● Turn the handwheel in the normal direction until the needle rise clamp rests on the spacer.
● Hold the handwheel at this position.
● Turn hook driving shaft 28 in the normal direction until the pin gauge can be inserted in the hole of feed
eccentric 5 and pins 27 (fig. 80).
● Insert the pin gauge and tighten one of the screws 29.
● Remove the pin gauge, needle rise clamp and the spacer and tighten all three screws 29.
Note:
On having tightened the screws 29, there must not be any play between the lower flat-toothed belt
sprocket 92 and calotte 95.
● Check section 4 "Adjustment of the feed dog height".
● Carry out section 5 "Adjustment of the synchronizer".
● Carry out section 12 "Sewing hook timing".
● Insert the buttonhole sensor.
● Attach the free-arm cover and fasten with both fastening screws 5.
● Bring the feed-dog lowering mechanism to the normal working position.
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