Singer 7285Q Instruction Manual page 38

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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Sewing speed control
Régulateur de vitesse
Control de velocidad de costura