Bobbin Winder - Singer Inspiration 4228 Service Manual

Setting

Bobbin winder

Check
When winding up the lower thread onto the bobbin the bob-
bin winder should stop turning when the thread is wound
min. of 1.5 mm between the edge of the bobbin and the
thread. (see illustration I).
Adjustment
1. Place an empty bobbin on bobbin winder spindle (a)
2. Push bobbin winder from side to side through the ope-
ning (b). At no time should any part of bobbin winder touch
either the opening or stop (c).
3. Check that the spindle (a) turns freely and there is
no vertical play. If either conditions exists, the assembly
should be replaced.
4. Check that the bobbin winder stays in either, left or right
position under spring pressure. If the pressure is absent,
spring will need to be replaced.
5. Lift up on bobbin winder tension disc. If tension is absent, replace the assembly.
6. Check for even rotation of bobbin winder. If it hesitates or fails to rotate, check for worn bob-
bin winder rubber ring.
7. Wind a bobbin and check if thread is wound evenly (see illustration) or forms a cone. The
bobbin winder should stop turning when the thread is wound to 1,5mm from the outer rim of the
bobbin (see illustration I).
8. To correct conical winding, adjust the height of the pre-
tension assembly, by turning the screw (d) clockwise or
counterclockwise.
9. If the bobbin winder stop (c) disengage too soon or fails
to operate, loosen screw (e) and turn stop (c) left or right to
adjust. Tighten the screw (e).
10. Check once again all procedures.
34 Singer Inspiration