JUKI MF-7700D Series Engineer's Manual page 121

Adjustment Procedure
10. Adjusting the disk-rise
(1) Loosen setscrew
and disk-rise plate
(2) Adjust the clearance between the click section
and thread tension disk
enters thread tension disk
(3) If the click section
thread tension disk
ful.
11. Adjusting the thread release hook
(1) Loosen setscrew
release rod to the top end of thread guide
and tighten setscrew
(2) Loosen setscrew
up or down, and the thread remaining length at the start of sewing
can be adjusted.
o When the position of thread release hook
remaining length at the start of sewing is decreased and when it
is lowered, the thread remaining length at the start of sewing is
increased.
(Caution) When the thread remaining length at the start of sew-
ing is short, stitch skipping or slip-off of thread from
needle eyelet at the start of sewing is apt to occur.
in adjustment cam , turn adjustment cam
moves up down.
to 0 to –0.5mm (Click section
.) and tighten setscrew
of disk-rise plate
, sewing trouble will be caused. So, be care-
, adjust the dimension from the top end of thread
.
, move the position of thread release hook
of disk-rise plate
.
comes in contact with
to 33 to 36 mm,
is raised, the thread
– 117 –
Results of Improper Adjustment
UT31