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

6-4. 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 of the hook needle guard s obtaned when hook needle guard 2 comes n contact
wth the sde face of needle 1 and the engagement length between the needle and the hook needle guard s
0 to 0.05 mm. 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 "4-17. Needle-to-hook relation [common]", p.

6-5. 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.)
2
3
2
1
5
28.)
) 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 pro-
truson A of the bobbn case to 0.2 to 0.3 mm,
and securely tghten nner hook gude setscrew
5 .
– 37 –
(Bend outward.)
2