Tension Disk Opening Amount; Base Tension Opening Amount - JUKI HZL-F series Service Manual

5-10-3 Tension disk opening amount

○ Remove the face cover, thread tension cover
and the spool cover.
Adjustment procedure
1. Maximize the tension with the thread tension
adjustment dial. Raise the presser foot lifting lever.
2. Adjust the clearance between tension disks (A)
and (B) to 1 mm by turning the thread tension
float adjusting screw.

5-10-4 Base tension opening amount

○ Remove the face cover, the thread tension cover and the spool cover.
Adjustment procedure
1. Raise the presser foot lifting lever.
2. Adjust the base tension opening amount to 1 mm by turning the base tension adjusting screw.
Base tension
adjusting screw
* The pretension disk float adjusting screw and the tension disk float adjusting screw can be
turned without loosening the nuts.
Pretension disk
Thread tension
disk float adjusting
screw
– 17 –
Disk A
1 mm
Pretension disk
float adjusting
screw
Tension disk float
adjusting screw
Disk B