Service manual

S100
1-63
Revised 10/2005
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F - MACHINE ADJUSTMENT - CROSS BAR
6. Check before the eye of the buttonhole is sewn, if the cam and lever loosened the pivot
and allows the side movement of the table. Loosen the screws and perform the angle adjustment
of the cam . After the lever slot falls on the pivot tighten the screws .
7. In the position when the buttonhole eye was just sewn = before the second row of buttonhole will be
sew, and the pivot is located in the slot adjust the clearance between the screw and the
lever boss .
In the moment, when the sewing mechanism is turned by 90° (during the sewing cross bar), it is
necessary to keep adequate clearance between main cam brake in the cam case and roller turning
lever. If the clearance is not appropriate, enlarge the clearance between the screw and lever
boss .
Sewing the cross bar
1. Lead the machine to the position, when the stop  on the cam is unlocked by latch over the
support and lever . The lever  is leaning on the screw . This is an appropriate position of
the machine to adjust the length of the first and second row of the buttonhole.
2. Setting the length of the first and second row of buttonhole
Loosen the screw and move the arm with latch .By
moving it backwards from the operator, to decrease the
length of the second row of stitches (picture 1 b). By
moving it forward in direction to the operator to decrease
the length of the first row of stitches (picture 2 a). Correct
adjustment is shown on the picture 3.
Note:
- If cutting before sewing the buttonhole is used, make sure
that the stitches of the cross bar will not impinge to cut part
of the buttonhole (it depends of the length of the buttonhole
and used cutting mat)
- If cutting after is used, make sure that the cross bar
stitches will not be cut.
- the stitches at the beginning and at the end of the first and second row of the stitches must be
sewn up by the cross bar.
3. The drive will ensure the stop of the sewing - the cam is turned by 360° and the drive lift the
lever and the rod loosen the block of the stopping mechanism. The driver on the lever
must be set to obtain extruding the support by the latch during the sewing the cross bar.
It loosen the cam and sewing the cross bar. It is necessary to ensure loosening of the block of the
stopping mechanism in the moment when the lower part of the lever is on the top of drive .
Loosen the screw , move the rod and then perform the adjustment.
1
2
3
Backward
b
a
Forward
5. Adjustment of the cam and the lever perform only after the buttonhole eye is adjusted - see
chapter D 9. Use the hand crank turn the cam
so that the pivot is still in the travel of the cam.
This is the position, when the eye of the buttonhole was just sewn. At the same time, the lever
falls
to the cam recess and ensure the pivot .