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5.
Additional equipment
5.1
Pneumatic feed foot lifting
By machines with pneumatic feed foot lifting <FLP> or pneumatic
back-tacking <RAP>
,
the cylinder K/12 lifts the presser foot at the
end of a seam.
The position of the needle and the presser foot
whE~n
the pedal is
released can be adjusted in the motor-control box P/3
.
Control box Efka type 9 B 31 <FLP>, fig.
22
Needle position
with the jumper b17
Presser foot position: with the jumper b23
Control box Efka Type 8 E 521 <RAP>, fig.
21
Needle position
with the switch S17
Presser foot position: with the switch S23
Control box Quick Type AQ 5
.
852 <FLP> and AQ 5.609 <RAP>,
Needle position
with the switch A
Presser foot position: with the switch E
5.2
Pneumatic reverse stitching
,
RSP
fig
.
23
With the switch a2/1
.
the stitch regulator is pneumatically switched
to backwards stitching and a red light goes on in the switch
.
Next time the switch is pressed
,
the stitch regulator is switched back
to forward sewing and the red light goes off.
By depressing the button b1/1 or the knee switch
b2:
/3. the stitch
regulator remains in the backwards stitching position for as long as
button
or·
knee-switch are held
.
During this time the red light is on
in switch a2/1.
The machine reverts to forward stitching on releasing either lhe
button or the knee-switch
.
The red lights goes off
.
5.3
Pneumatic backtacking, RAP
Single and double initial and final backtacking is adjustable on lhe
motor control box P/3.
The initial backtack is actuated by
dep~essing
the pedal forwards, the
final backtack by depressing the pedal backwards al the end of a
seam.
5
.
3.1
Motor control box Efka Type 8 E 521
Initial backtack, fig
.
21
- Switch S20 up
Initial backtack single
middle:
off
down
doublP
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