Efka dc1550 - Backtack Stitch Length; Start Backtack;Stitch Condensing; Start Backtack Speed (n3); Start Stitch Counting

- PF321A6012
- 25 -
7.4.2 Stitch length in the automatic backtacks
Function with or without control panel
Parameter
Stitch length in the automatic backtacks
(Slu)
138
138 = 0
The backtack is implemented using a switch stitch length described by an input function as in
parameter 240 = 77, in normal or short stitch length.
138 = 1
The backtack is always implemented using a short stitch length. The input function described in
parameter 240 = 77 is ineffective.
7.4.3 Start Backtack/Start Stitch Condensing
Function without control panel
Control
Single start backtack
Double start backtack
Start backtack Off
LED 1 On
LED 2 On
both LEDs Off
Key E (S2)
Start stitch condensing On; number of stitches with stitch regulator
(parameter 001)
Start stitch condensing On; number of stitches without stitch regulator
(Parameter 000) after that number of stitches with stitch regulator
(Parameter 001) Start stitch condensing Off
LED 1 On
LED 2 On
both LEDs Off
Key E (S2)
Function with control panel
V810/V820/V850
Single start backtack
Double start backtack
Start backtack Off
left-hand arrow above key
On
right-hand arrow above key
On
both arrows Off
Key 1
Start stitch condensing On; number of stitches with stitch regulator
(parameter 001)
Start stitch condensing On; number of stitches without stitch regulator
(Parameter 000) after that number of stitches with stitch regulator
(Parameter 001) Start stitch condensing Off
left-hand arrow above key
On
right-hand arrow above key
On
both arrows Off
Key S2
The start backtack/start stitch condensing starts by pressing the pedal forward at the beginning of the seam.
From lifted sewing foot the backtack is delayed by the time t3 (start delay after switching off the sewing foot
lifting signal). Start backtack as well as start stitch condensing are executed automatically at speed n3. They
cannot be interrupted. If softstart is running parallel, the respective lower speed is prevailing. The stitch
regulator will be switched off after completion of the stitch count (parameter 001) and the speed n3 after a delay
time t1. Then pedal control is returned. The stitch regulator and counter are synchronized to position 1.
7.4.3.1 Speed n3 at the Start of the Seam
Function with or without control panel
Parameter
Start backtack/start stitch condensing speed
Start backtack/start stitch condensing speed can be interrupted by pedal in pos. 0 (neutral)
Start and end backtack or stitch condensing can be interrupted by pedal in pos. 0 (neutral)
On/Off
(n3)
(n2A)
(StP)
112
162
164
When programming 3-digit or 4-digit parameter values on the control, the 2-digit or 3-digit values displayed must
be multiplied by 10.
7.4.3.2 Stitch Counting for Start Backtack/Start Stitch Condensing
Function with or without control panel
Parameter
Number of stitches forward or without stitch regulator
Number of stitches backward or with stitch regulator
Double start backtack repetition
Backtack repetition On/Off
(c2)
(c1)
(war)
(Fwr)
000
001
090
092