21
66
Sewing
6.1) Sewing
1) Press ON button of power switch
①
.
2) Lamp on the control panel
②
turns on and machine
is ready to operate.
3) Control sewing conditions by using control panel
②
.
(See user’s manual of Fortuna IV.)
4) Step on the pedal to operate.
[Fig. 6-1]
•
Wear protective gears for safety. Operation without them may lead to physical injuries.
•
Turn off the machine in the following situations.
If the operator mistakenly steps on the pedal with the plug in, the machine will start automatically
and can cause severe injuries.
-
When inserting upper thread
-
When replacing bobbin or needle
-
When the machine not in use or the operator leaving the work place.
Caution
6.2) Adjusting thread tension
Sewing Type
Cause
Troubleshooting
Good sewing in balance
Upper thread tension is too weak
Lower thread tension is too strong
Upper thread tension is too strong
Lower thread tension is too weak
Make upper thread tension strong or make
lower thread tension weak
Make upper thread tension weak or make
lower thread tension strong
When inserting and removing bobbin case, make sure to turn off the power switch.
If the pedal is accidentally stepped, the machine might unexpectedly operate, causing injury.
Caution
①
②
Summary of Contents for KM-1640BL-7
Page 2: ......
