64
Adjusting the machine:
• Tilt the machine towards the rear.
• Disconnect spring 3 (fig. 69).
• 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.
• 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 102.
• 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 (61-111 600-02) 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.
• 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 102 and calotte 104.
• Check section 4 „Adjustment of the feed dog height“.
• Carry out section 5 „Adjustment of the synchronizer“.
• Carry out section 14 „Sewing hook timing“.
• Insert the buttonhole sensor.
• Attach the free-arm cover and fasten with both fastening screws 7.
• Bring the feed-dog lowering mechanism to the normal working position.
• Engage both feed regulators.
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