Instruction Of Pedal Control - Jack JK-SHIRLEYIIE Operation And Daily Service Manual

Mechanical adjustments
The first tension device adjustment
Control the length on the needle after automatic trimming
and the thread length around 4-4.5 cm is the best. Adjusting
the knob in clockwise way, thread will be short; otherwise, it
will be long.
The main tension device adjustment
Control the tension of thread during sewing. Adjusting the
knob in clockwise way, the tension will be bigger; otherwise,
it will be smaller.If the under-thread loose, the tension
should be adjusted stronger, but too stronger would cause
upper-thread be cut easily
Needle gauge adjustment
The left hand holds the backstitch wrench, with the middle
finger back from the lock to the needle, with the thumb and
index finger rotating needle gauge plate. The gage will be
smaller when turning in clockwise way and will be bigger
when turning in anti-clockwise way.
Reverse-sewing button Operation
During sewing, keep pressing the reverse-sewing button , the
machine will be in reverse-sewing state; otherwise, the
machine will be in sewing state.
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Instruction of Pedal Control

Original state
Turn on the power, machine will be up needle position ,the pedal will be as
original state
Step forward to run:
When powered on, the speed will change as the pedal stepped deeper, the
deeper the pedal stepped ,the higher the speed will be.
Step backward to trim and stop:
After sewing, step the rear of pedal, machine will trim and stop. If there is
presser foot lifter accessories, presser foot will lift when stepping backward
further .
Press and together to enter technician mode, the pedal control mode can be changed
by adjusting the following parameter:
P30: Pedal Curve mode setup (0：Auto Calculated liner Curve; 1：Two segment liner Curve;
2：Arithmetic Curve; 3：S curve)
P34: Pedal trimming position set (the value is not higher than the parameter [35]);
when adjust P34, need to adjust the value of P35 closer to the value of P36, that's the sensitivity of
trimming
P35: Press foot lifting （the value is between[34]and[36].）
P36: Pedal back mid position （the value is between[35]and[37].）
P37: Pedal step upon running position （the value is between[36]and[38]）, if want the machine
to response faster, need to turn down the value of P37, but the value should be higher than P36
P38: Pedal low speed running position（the value is between[37]and[39]）
P39: Pedal simulation the largest of value （the value is not lower than the parameter [38]）
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