JUKI LH-4500C Series Instruction Manual page 117






[Adjustment of the knife pressure]
Loosen screws  . Adjust the knife pressure by
moving counter knife arm  up or down.
After the thread is changed to an-
other thread of different count, the
clamp spring pressure may need to
be re-adjusted in some cases.
[Adjustment of the bobbin thread clamp
pressure]
Loosen screw  . Adjust the clamp pressure by
turning clamp arm  in the direction of the arrow.
Adjust so that the tip of clamp is positioned 1.3
mm higher than moving knife base  .
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