SINGER 112 - Manual (Page 29)

Zigzag Sewing Machine Instruction Manual and Parts List
Knee operating stitch width control;
Bell cranks '1' and '2' shown in Figure 35 are fastened
to the underside of the bed, Bell crank 'Г Is used for
lifting and lowering the presser foot with knee and
bell crank '2' is used for controlling the stitch width.
To control the stitch width with knee, loosen screw '4'
holding the knee lifter shaft arm '3' and move knee
lifter shaft arm '3' just under the bell crank '2' and
firmly tighten screw '4'.
Loosen the lock nut holding screw T and turn screw
'7' as required, so that the bent end '6' of knee lifter
shaft arm '3' will be almost horizontal when knee
lifter knee plate '5' is pushed as far as it will go in the
direction indicated with arrow 'A'. Then firmly tighten
the lock nut.
With knee lifter shaft arm '3' set in position as
described above, loosen screw '8' and move knee
lifter shah arm '3' up or down as required, so that
height '10' from its bent end '6' to bracket is 67 mm.
Loosen stitch width regulating plate thumb screws
'1Г and '12' so that stitch width regulator '13' can be
moved from zero to maximum stitch width. (20U-103
/ 109C / 308: 9mm or 20U-112 / 112C: 12mm). Loosen
the lock nut holding screw '14' and turn screw '14' as
required, so that knee lifter knee plate '5' when
pushed in the direction indicated with arrow 'B', will
stop at the maximum stitch width position of stitch
width regulator '13'. Then firmly tighten the lock nut.
Stitch width will become wider when knee lifter knee
plate '5' is pushed in the direction indicated with
arrow 'B' and will become smaller when knee plate is
released.
Figure 35
Caution:
• Switch off the machine.
• Set sewing head upright again using both hands.
• Danger of crushing between sewing head and table top