Singer 471U - Lower Thread Cutter Adjustment; Movable Knife and Fixed; Knife Adjustment

[T] Lower thread cutter adjustment
If this assembly is not properly adjusted, the bobbin thread cutter to upper thread cutter timing will be off, the
bobbin thread may not be cut, and the bobbin thread length may become inadvertently long.
0
With the machine stopped, loosen the bolt O, and adjustthegap between thebobbinthreadcam lever roller®
andtopofthe groove inthe bobbin thread cutter cam ® to 1.0 mm. After adjusting, depress the upper clamping
foot lifter pedal and check that the lower movable knife O meetsthe lowerfixed knife0 and cuts the thread
cleanly before the upper clamping foot raises 2.0 mm above the top of the needle plate.
U] Movable knife and fixed knife adjustment
Ifthese knives are not properly aligned, the bobbinthread maynot becut,or the remaining bobbinthread may
be too short and cause the next stitch to be skipped.
1. Movable knife and fixed knife adjustment
Loosen the four set screws 0 and 0 and move the
movable knife 0 and/or the fixed knife 0 to
adjust the movable knife 0 to fixed knife 0
cutting width to 1.0mm. Operate the bobbin thread
cutter lever by hand to cross the movable knife over
the fixed knife for this adjustment.
* Doing this adjustment, please check thread retainer
writer blow again.
Thread retainer position adjustment
Loosen the two set screws 0 and move the thread
retainer 0 so that approximately 30mm of thread
trails from the bobbin case after bobbin thread
cutting. Work the bobbin thread cutter lever by
hand for this adjustment.
If the thread retainer isadjusted, besure to readjust
the movable knife and fixed knife as described
above.
-50-
m
1 mm
0
0
0
From the library of: Superior Sewing Machine & Supply LLC