HIGHLEAD HLK-3020, Instruction Manual Parts Catalog

Page: 15 / 45

—
13
—
7-4.Adjustment of the presser foot
[NOTE]The presser foot is a very important part for performing fine stitches
．
It moves simultaneously with the needle. When the needle sticks into or pulls out the sewing material,
the inner foot must press down on sewing material and stabilize the needle penetrating area to prevent the
skip stitch or the over penetration happening
．
Please adjust the presser foot properly to the sewing materials
with the following instructions
．
7-4-1.Adjustment of the presser foot position
[NOTE]Please always adjust the presser foot position when the thickness of the sewing material is changed
．
(1) Turn the power switch OFF
．
(2) Remove the face plate and cover
．
(3) Turn hand wheel to move Crank
①
to left end, loosen set screw
④
to disconnect air cylinder link
rod
③
from knee lifter lever
②
.
（
4
）
Pull up presser bar
⑤
and presser bar clamp
⑥
, put a block with 12.7mm height as following figure
shows as positioning.
（
5
）
Fix the drive shaft
⑦
, tighten set screw
⑧，
reinstall the knee lifter lever
②
and other parts mentioned
in above item (3) to their original positions.
（
6
）
Loosen the presser foot bar setscrew
⑨
and move the presser foot
⑩
up and down to adjust the height
of presser foot to proper position.
[NOTE]The lower position of the presser foot
，
the more effective for preventing skip stitches
．
However
，
if the
presser foot press the sewing material too hard
，
the movement of the presser foot mechanism will
make noise, the presser foot will stays longer holding sewing material
，
the upper thread tension
becomes loose and maybe the sewing pattern will out of shape. So the height of presser foot must be
adjusted to proper position according to different thickness of fabrics.
If the thickness of fabric changes frequently, better to adjust the height of presser foot in easiest way:
Loosen screw
⑨
and adjust the
height of the inner
presser foot
⑩
.
7-4-2.Adjustment of the
presser foot lift
during the sewing
Loosen bolt
○
11
，
move it up or down to
adjust the presser foot
lift to a proper
position and tight bolt
○
11
then.