Singer 7258 Instruction Manual page 38

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Sewing speed control
Regulateur de vitesse
Control de vetocidad de costura
SEWING SPEED CONTROL
Sewing speed is set by using the sewing speed control. The
sewing speed control is moved horizontally to determine the
amount of speed required.
Regardless of the setting, maximum speed may be limited
depending on which pattern has been selected.
NOTE: When using the foot control, if the sewing
speed control is set on the lower setting, the machine
will not sew faster than the speed at which the speed
control is set, even when the foot control is fully
depressed.
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