Needle-To-Hook Relationship - JUKI DDL-8100e Instruction Manual

18. nEEDLE-to-HooK rELatIonsHIP

WarnInG :
to avoid possible personal injury due to abrupt start of the machine, turn off the power to the
machine and check to be sure that the motor has totally stopped rotating in prior.
1
4
3
5
A
B
2
If the clearance between the blade point of hook and the needle is smaller than the specified
value, the blade point of hook will be damaged. If the clearance is larger, stitch skipping will
result.
(1) adjust the timing between the needle
and the hook as follows :
) Turn the handwheel to brght the needle bar down
to the lowest pont of ts stroke, and loosen set-
screw 1 .
(adjusting the needle bar height)
A
2) Ths machne uses the DB needle. To use the DB
needle, algn engraved marker lne A of needle
B
bar 2 wth the lower end of needle bar lower
0.04 to 0.1 mm
bushng 3 and tghten needle bar connectng
stud setscrew 1 .
(adjusting position of the hook
3) Ths machne uses the DB needle. To use the
DB needle, loosen two hook setscrews, turn the
handwheel to move needle bar 2 upward ts
engraved marker lne B s algned wth the lower
a
end of needle bar lower bushng 3 .
4) After making the adjustments mentioned in the
above steps, algn hook blade pont 5 wth
the center of needle 4 . Provde a clearance of
0.04 mm to 0.1 mm (0.06 to 0.12 mm for DDL-
8100eH) (reference value) between the needle
and the hook, then securely tghten setscrews n
the hook.
– 10 –
)
a