JUKI MF-7700D Series Engineer's Manual page 19

Adjustment Procedure
1. Loosen setscrews
position of spreader thread guide
is fixed to rocking thread take-up
height direction.)
2. After the adjustment, turn the sewing machine by hand and check
whether spreader thread take-up
thread guide , or section
3. Adjusting procedure of the clearance
(1) Loosen setscrews
lateral direction, or loosen setscrews
up and move spreader thread take-up
the clearance.
(Caution) When loosening setscrews
up and adjusting the position of spreader thread take-
up , adjust so that 95, length of rocking thread take-
up (95mm) does not change.
in spreader thread guide
. (Spreader thread take-up
and can not be adjusted in the
comes in contact with spreader
of clearance is too small.
A
in spreader thread guide
in the rocking thread take-
to the right or left to adjust
in the rocking thread take-
Results of Improper Adjustment
and adjust the
and adjust in the
– 15 –
o When the relation of position
between spreader thread take-
up and the spreader thread
guide is not proper, sewing
troubles such as stitch skipping
and the like will be caused.
o If thread is less stretched and
slackness of thread occurs at the
thread take-up section when
spreader thread take-up
its highest position, the spreader
fails to pick up thread and stitch
skipping occurs.
o If stretch or feeding of thread is
excessive when spreader thread
take-up is in its highest
position, not only thread on the
seam side is drawn and needle
thread can not be tightened, but
also needle bend or needle
breakage will be caused.
o If stretch or feeding of thread is
excessive when spreader thread
take-up is in its lowest
position, thread slacks when the
spreader moves from left to right
and stitch skipping occurs.
is in