Stitch Length Adjustment; Thread Tension Adjustment - Singer 191D-20 Instruction Manual

3.10
Stitch Length
Adjustment
3.11
Thread Tension
Adjustment
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Turn stitch length dial '1' in the direc-
tion of the arrow, and align the de-
sired number to marker dot 'A' on the
machine arm (Figure 15).
The indication of the dial is in milli-
meters.
Adjusting needle thread tension
(Figure 16)
Adjust the tension of needle thread
using tension adjusting nut '1' ac-
cording to different sewing condi-
tions.
Turn the nut '1' clockwise (in direc-
tion 'A'), the tension will increase.
Turn the nut '1' counterclockwise
(in direction 'B'), the tension will
decrease.
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Figure 15
Figure 16
High Speed Straight Lockstitch Sewing Machine
When you want to decrease the stitch
length, turn stitch length dial '1' while
pressing feed reverse lever '2' in the
direction of the arrow.
Adjusting the bobbin thread ten-
sion (Figure 17)
Turn the tension adjusting screw '2'
clockwise (in direction 'C'), the bob-
bin thread tension will increase.
Turn the screw '2' counterclockwise
(in direction 'D'), the bobbin thread
tension will decrease.
Figure 17
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