Adjusting The Disk Opening Amount; Adjusting The Tension Release Adjusting Plate; Pretension Disk Opening Amount - JUKI HZL-F series Service Manual

5-10 Adjusting the disk opening amount

5-10-1 Adjusting the thread tension release adjusting plate
○ Remove the face cover, the thread tension cover and the spool cover.
Adjustment procedure
. Raise the presser foot lifting lever.
2. Loosen the adjusting screw and adjust the thread tension release adjusting plate so that the top end of
claw of the opening arm aligns with the marker dot on the thread releasing arm.
Adjusting
screw

5-10-2 Pretension disk opening amount

○ Remove the face cover, thread tension cover and
the spool cover.
Adjustment procedure
. Raise the presser foot lifting lever.
2. Adjust the pretension disk float adjusting screw
so that the opening amount of the pretension
disk becomes approximately  mm.
Note that the tension of the pretension is fixed
and not adjustable.
Thread tension release adjusting plate
– 6 –
Thread releasing arm
Opening arm
Align with the marker dot
1 mm