Additional Equipment; Pneumatic Foot Lifting; Pneumatic Reverse Stitching - Dürkopp Adler 204 Operating Instructions Manual

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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