Singer 2802 Service Manual page 90

Service Manual
Check:
1. Run machine and push bobbin winder spindle (A) to the left (OFF position).
2. Place empty bobbin on bobbin winder spindle (A).
3. Push bobbin winder from side to side in side opening (D). At no time should any part of
the bobbin winder or the bobbin touch either the opening or the bobbin winder stop (C).
4. Check that the spindle (A) turns freely and that there is no vertical (up and down) play. If
either condition exists, the bobbin winder assembly should be replaced.
5. Check that the bobbin winder stays in either the left or right position under spring
pressure. If spring pressure is absent, spring might be weak or broken and will need to be
replaced.
6. Lift up on bobbin winder tension disc (I) and feel for presence of slight tension. If tension
is absent, replace bobbin winder tension assembly.
7. Place bobbin winder to the right (ON) position and run machine, checking for even
rotation of bobbin winder. If the bobbin winder hesitates or fails to rotate, remove
covers and check for worn or absent bobbin winder rubber ring .
8. Thread machine for bobbin winding (illustration M).
9. Wind a bobbin and check if thread is wound evenly, (illustration K), or forms a cone at
either end, (illustration L). The bobbin winder should stop turning when the thread is
wound to 1,5 mm (1/16") from the outer rim of the bobbin.
Adjustment:
1. To correct conical winding of the thread (illustration L), adjust the height of the tension
assembly by turning the adjusting screw (H) clockwise or counterclockwise as necessary.
2. If the bobbin winder stop (C) disengage too soon or fails to operate, loosen screw (B) and
turn stop (C) toward the hand wheel to give more thread on the bobbin or away from the
hand wheel, for less thread, tighten screw (B).
3. Recheck operation of bobbin winder and stop.
Bobbin winder operation and disengagement. Readjust if necessary.
Rev. n .
o
Bobbin Winder
89
358487-001 Mar./2005