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4-1-3. Adjusting the bobbin thread tension
❶
❶
A
B
A
B
The bobbin thread tension is increased by turning
bobbin thread tension screw
❶
clockwise
A
, or is
decreased by turning it counterclockwise
B
.
WARNING :
To protect against possible personal injury due to abrupt start of the machine, be sure to start the
following work after turning the power o and ascertaining that the motor is at rest.