JUKI MF-7900 Series Engineer's Manual page 81

5) Setting of the auto lifter function
WARNING :
When the solenoid is used with the air drive setting, the solenoid may be burned out. So, do not
mistake the setting.
When the auto-lifter device (AK) is attached, this function makes the function of auto-lifter work.
❶
❷ ❸ ❹
FL ON : Auto-lifter device becomes effective. Selection of the auto-lifter device of solenoid drive (+33V) or
of air drive (+24V) can be performed with
(Changeover is performed to drive power +33V or +24V of CN37.)
Solenoid drive display (+33V)
FL OFF : Auto-lifter function does not work. (Similarly, the presser foot is not automatically lifted when pro-
grammed stitching is completed.)
(Caution) 1. To perform re-turning ON of the power, be sure to perform after the time of one second
or more has passed.
(If ON / OFF operation of the power is performed quickly, setting may be not changed
over well.)
2. Auto-lifter is not actuated unless this function is properly selected.
3. When "FL ON" is selected without installing the auto-lifter device, starting is momen-
tarily delayed at the start of sewing. In addition, be sure to select "FL OFF" when the
auto-lifter is not installed since the touch-back switch may not work.
6) Setting of the pedal stroke
: Lifting start position of pedal presser lifter
: Pedal stroke of thread trimming start
Ⓐ Ⓑ
❺ ❻ ❼
Air drive display (+24V)
– 67 –
1) Turn ON the power switch with
switch ❺ held pressed.
2) "FL ON" is displayed on indicators Ⓐ
and Ⓑ with a blip to make the auto
lifter function effective.
3) Turn OFF the power switch, and turn
ON the power switch again to return
to the normal mode.
4) Repeat the operation 1) to 3), and
LED display is turned to "FL OFF".
Then, the function of auto-lifter does
not work.
switch ❻ .
When using the top covering thread,
perform the setting below.
• Set so that thread trimming opera-
tion can be performed before using
the auto-lifter.
•
Set the lifting start position of the
pedal presser lifter of the function
setting No. 41 to "
and the pedal stroke of the thread
trimming start of the function setting
No. 43 to "
tively.
(Caution) Occurrence of stitch skip-
ping, thread trimming
failure, or stitch trouble
may be caused unless the
setting is changed. So, be
careful.
/ "
/ " respec-