6-3.Adjustment Of The Thread Tension; 6-4.Removing And Inserting The Bobbin; Adjustment Of Sewing Machine - HIGHLEAD HLK-3020 Instruction Manual Parts Catalog

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 screw①adjust 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 nut③clockwise 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
★ 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.
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