JUKI SC-921 Instruction Manual page 36

⑮ Holding time of lifting presser foot (Function setting No. 47)
This function automatically lowers the presser foot when the time set with the setting No. 47 has passed
after lifting the presser foot.
When the pneumatic type presser foot lifter is selected, the holding time control of lifting presser foot is
limitless regardless of the set value.
4 7
⑯ Compensation of timing of the solenoid for reverse feed stitching (Function setting No. 51 to 53)
When the normal and reverse feed stitches are not uniform under the automatic reverse feed stitching
action, this function can change the ON / OFF timing of the solenoid for back tack and compensate the
timing.
❶ Compensation of on-timing of solenoid for reverse feed stitching at the start of sewing (Function setting
No. 51)
On-timing of solenoid for reverse feed stitching at the start of sewing can be compensated by the unit
of angle.
5 1
Set value Compensation angle Number of stitches of compensation
– 36
– 18
0
18
36
❷ Compensation of off-timing of solenoid for reverse feed stitching at the start of sewing (Function setting
No. 52)
Off-timing of solenoid for reverse feed stitching at the start of sewing can be compensated by the unit
of angle.
5 2
Set value Compensation angle Number of stitches of compensation
– 36
– 18
0
18
36
❸ Compensation of off-timing of solenoid for reverse feed stitching at the end of sewing (Function setting
No. 53)
Off-timing of solenoid for reverse feed stitching at the start of sewing can be compensated by the unit
of angle.
5 3
Set value Compensation angle Number of stitches of compensation
– 36
– 18
0
18
36
6 0 Setting range : 10 to 600 sec <10 / sec>
1 0 Adjusting range : – 36 to 36 <1 / 10˚>
– 360 ̊
– 180 ̊
0 ̊
180 ̊
360 ̊
1 6 Adjusting range : – 36 to 36 <1 / 10˚>
– 360 ̊
– 180 ̊
0 ̊
180 ̊
360 ̊
1 8 Adjusting range : – 36 to 36 <1 / 10˚>
– 360 ̊
– 180 ̊
0 ̊
180 ̊
360 ̊
– 1
– 0.5
– 360˚
– 180˚
0
0˚
0.5
180˚
360˚
1
– 1
– 0.5
0
0.5
1
– 360˚
– 180˚
– 1
– 0.5
180˚
360˚
0
0.5
1
– 34 –
* When the point
before 1 stitch is
regarded as 0˚,
compensation is
possible by 360˚ (1
stitch) in front and in
the rear.
– 360˚
– 180˚
0˚
180˚
360˚
0˚