Instruction manual
EFKA DA321G5321 (BA)
63
8.16.3 Analog Speed Limitation Speedomat
The speedomat function enables a speed limitation depending on the set sewing foot high lift (21 levels). The actual value
of the high lift is transmitted to the control by the position of a potentiometer (10kΩ) with an angle of rotation of 60°,
which is coupled with the high lift shaft.
The maximum angle of rotation of the high lift shaft is 48°. Thus the setting range of the potentiometer is from 9kΩ (nmax
= 4.5V on socket A/3) to 1kΩ (nlim. = 0.5V on socket A/3).
Potentiometer connections see chapter "Connection Diagram".
Function with or without control panel Parameter
Maximum speed (n2) 111
High lift walking speed (n10) 117
Speed setting depending on high lift (hP) 188
It is possible to program the assignment of the speed limitation to the 21 high lift levels.
Minimum high lift = maximum speed (n2)
Maximum high lift = minimum speed (n10)
Graduation of the example below is as follows:
Speed
3500 X X X X X upper speed break point
3200 X
3110 X
3020 X
2930 X
2840 X
2740 ----------------------------------------------------------- X
2650 X
2560 X
2470 X
2380 X
2280 X
2190 X
2100 X
2000 lower speed break point X X X
01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 Levels
Display example of parameter 188 on the V820/V850 control panel:
Signification:
XX Display of the level up to which the maximum speed is effective
(upper break point).
YY Display of the level from which the maximum speed is effective
(lower break point).
AB Display of the level set on the potentiometer.
ZZZZ Speed resulting from the set high lift level.
EEEE Outside of the speed range.
8.16.4 Setting the Speed Limitation Depending on High Lift with the V820 Control Panel
Determine maximum speed (n2) using parameter 111.
Determine minimum speed (n10) using parameter 117.
Call parameter 188.
Press the E key.
Press the F2 key.
Set high lift for walking foot (potentiometer on the machine) to the level up to which full speed is to be maintained
(upper break point).
New value of AB is taken over to XX.
ZZZZ XX AB YY
E
F
–
188 hP [ ° ]
F2
ZZZZ XX AB YY
E
ZZZZ XX
A
B YY