; THREAD TENSIONS ; It is important that tension of upper and lower threads be equal to prevent puckering of  - Page 17

THREAD TENSIONS 

It is important that tension of upper and lower threads be equal to prevent puckering of  
material or other problems. 
It is recommended that a test sample be made before starting to sew. 
 

UPPER THREAD TENSION  

To regulate upper thread tension, merely 
turn thread tension dial with your thumb 
after lowering the presser foot. 
 
THE HIGHER THE NUMBER, THE 
TIGHTER THE TENSION. 
 
To increase tension:  Turn dial to right to 
   larger 

number. 

To decrease tension:  Turn dial to left to 
   smaller 

number. 

NOTE: The zigzag stitch requires less upper 

tension than the straight stitch. 

LOWER THREAD TENSION 

Although lower thread tension has already 
been adjusted at the factory, when sewing 
very thin or heavy materials it may have to 
be readjusted. 
 
To regulate the lower thread tension, turn 
small screw on the tension, spring of the 
bobbin case with the small screw driver. 
 
To increase tension:  Turn the small screw  

clockwise very 
slightly. 

To decrease tension:  Turn 

the 

screw 

counterclockwise 
very slightly. 

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