HIGHLEAD HLK-3020, Instruction Manual Parts Catalog

Page: 13 / 45

—
11
—
★
Power off before adjustment.
★
Keep foot away from operation pedal in the case of must have power on during adjustment,
。
★
Mind your hand from needle and hook point.
★
All safety guards(Eye guard
：
belt cover
，
Link cover
，
Finger guard etc
．
) must be reinstalled
properly after adjustment.
6-3.Adjustment of the thread tension
The thread tension between the upper and bottom thread should be balanced
．
When the upper thread tension is well balanced with the bobbin thread tension
，
both threads are interlocked
along the centerline of fabric layers as shown on the below figures
．
Note: Thread tension should be adjusted to fit different fabrics.
（
1
）
Adjusting of bobbin thread
tension.
Loosen screw
①
adjust bobbin
thread tension with thread tension
adjusting screw
②
.Turn the screw
clockwise to increase the tension,
turn the screw counterclockwise to
decrease thread tension.
（
2
）
Adjusting of upper thread
tension.
Adjust the upper thread tension
according to the bobbin thread tension
．
Turn the thread tension adjusting nut
③
clockwise to increase the thread
tension, or turn it counterclockwise to decrease the tension
．
6-4.Removing and Inserting the bobbin
(1) Removing: Open the shuttle race cap and the bobbin case, then take out the bobbin.
(2) Installation: Install the bobbin in the bobbin case, make sure the bobbin will rotate couterclockwise
and then pull the end of thread out.
7. ADJUSTMENT OF SEWING MACHINE
Caution