Adjusting The Hook Needle Guard; Adjusting The Inner Hook Guide - JUKI LH-3500 Series Instruction Manual

6-3. Adjusting the hook needle guard

WARNING :
To protect against possible personal injury due to abrupt start of the machine, be sure to start the
following work after turning the power off and ascertaining that the motor is at rest.
1
2
0 to 0.05mm
When replacing the hook, confirm the position of the needle guard.
The standard poston s the state that hook needle guard 2 comes n contact wth the sde of needle
1 and the needle s along the hook needle guard by 0 to 0.05mm. If not, adjust by bendng the hook
needle guard.
) When bendng the hook needle guard nward, perform by enterng a screwdrver to the outsde of
the hook needle guard.
2) When bendng the hook needle guard outward, perform by enterng a screwdrver to the nsde of
the hook needle guard.
At this time, confirm that the clearance between the needle and the blade point of hook is 0.01 to 0.05 mm.
(Refer to "4-15. Needle-to-hook relation [common]", p.

6-4. Adjusting the inner hook guide

WARNING :
To protect against possible personal injury due to abrupt start of the machine, be sure to start the
following work after turning the power off and ascertaining that the motor is at rest.
4
A
(Bend inward.)
3
2
1
5
2
22.)
) Turn the handwheel n the normal drecton to
brng nner hook gude 1 to the extreme rear
poston.
2) Turn bobbn case 2 n the drecton of the
arrow, and make nner hook stopper 3 come
n contact wth the groove of throat plate 4 .
3) Loosen nner hook gude setscrew 5 , set the
clearance between the nner hook gude and
protruson A of the bobbn case to 0.2 to 0.3
mm, and securely tghten nner hook gude
setscrew 5 .
– 30 –
(Bend outward.)
2