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24-2 Changing the amount of alternate vertical movement of walking
foot and presser foot
Cam rod position Top feed arm lowest position
Amount of alternate vertical movement of walking foot 0.2 to 0.3 mm
Clearance at lower dead point of walking foot 0.1mm
Amount of alternate vertical movement of presser foot Approximately 2.7 mm
Clearance at lower dead point of presser foot 0.1mm
When changing the amount of alternate vertical movement, change max. sewing speed.
When it is not changed, components breakage or damage occurs and the life of the machine is
excessively shortened.
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Amount of vertical movement of walking foot (mm) Less than 0.3 Up to 1.5 Up to 2.5 Up to 3.5
Amount of vertical movement of presser foot (mm) 2.7 1.5 2.5 3.5
Max. sewing speed (rpm) 3500 2600 2000 1600
(1) State of walking foot and presser foot at the time of delivery
(2) Relation between amount of alternate vertical movement and max. sewing speed
WARNING :
Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the
sewing machine.
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