9
7. Electronic control of the machine
(it is valid for sub-classes equipped with stop motor)
7.1 Control of sewing by means of control elements
7.1.1 Via treadle (treadle positions and function
possibilities)
The position of the treadle is read by the reader, which can
recognise 16 levels. Its meaning is shown on the table.
Treadle
Treadle
Meaning
position
-2
Foot full backwards
Command for thread
trimming (seam finishing)
-1
Foot slightly
Commandlifting
the top roller up
0
Neutral position
Note
1
Slightly forwards
Command releasing
top roller
2
Continually
Sewing at minimum
forwards
speed (1. gear)
3
Continually
Sewing at second
forwards
speed level
:
:
:
13
Fully forwards
Sewing at maximum
speed (12. gear)
Note:
It is possible to pre-adjust the needle position (up/down)
and foot position (up/down) by stopping in seam (introduc-
ing the treadle in neutral position). Foot position (up/down)
after seam finishing (pressing the treadle by foot fully back-
wards).
7.1.2 Via pushbutton panel
There are four built-in pushbuttons in the panel with fixed
adjustable functions:
T1 - bar operation (by pressing this pushbutton during sew-
ing the sewn work is feed back)
T2 - needle up/down (each press of the pushbutton changes
the needle position)
T3 - temporary cancelling (recalling) bar (in case) the bar is
pre programmed at the start and end of the seam, by
pressing the pushbutton down will uniformly switch off;
if it is not chosen it will switch on by pressing the push-
button
T4 - revolutions limitation (valid for motor Efka DA82GA)
- reduction of pressure of the presser foot for Mini-stop
EFKA DA320 (see The instructions for assembling with
Mini-stop, par. 5.2.4)
7.1.3 Via control panel Efka V 810/V 820
These functions are standardly assigned to the pushbuttons
A, B:
A - cancelling (recalling) the bar (the same function as T3 of
the pushbutton panel)
B - needle up/down(the same function as T2 of the push-
button panel)
Note:
function of the A,B pushbuttons can be changed by
different adjustment of parameters 293,294 (see the parame-
ters list of driving unit Efka DA82GA).
T 1
T 2
T 3
T 4
1 ÷ 13
0
-1
-2
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