Instruction manual

- DA321G5321
- 25 -
6.3 Start backtack
Function without control panel
Control
Single start backtack
Double start backtack
Start backtack Off
Segment 1 on
Segment 2 on
Both segments 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
Function with or without control panel
Parameter
Stitch length during backtack
Speed for start backtack can be interrupted by pedal 0
Start and end backtack can be interrupted by pedal in pos. 0
(SLu)
(n2A)
(StP)
137
125
284
The start backtack starts by pressing the pedal forward at the beginning of the seam. From lifted foot the
backtack is delayed by the time t3 (start delay after switching off the sewing foot lifting signal). The start
backtack automatically runs at speed n3. If softstart is running parallel, the respective lower speed is prevailing.
Parameter 284 can be used to determine whether an interruption of the start and end backtack is permitted. For
ornamental backtacks parameter 284 has no effect.
284 = 0
The backtacks run automatically and are not interruptible.
284 = 1
The backtacks can be interrupted by returning the pedal to 0. For this setting, the speed setting of
parameter 125 applies.
After an interrupted start backtack, the pedal can be moved forward to continue the backtack, and
pedal position –1 lifts the sewing foot while pedal position –2 stops the trimming process without
an end backtack. Automatic lifting of the sewing foot does not take place if the backtack is
interrupted.
Parameter 137 can be used to select the stitch length (normal or long stitch) during the backtack. The display
does not light up during the backtack.
137 = 0
The backtack is executed with a long stitch length.
137 = 1
The backtack is executed with a normal stitch length.
Counting as well as turning the stitch regulator on and off is synchronized to position 1.
The stitch regulator will be switched off after completion backwards section and the start backtack counter after
a delay time t1. Then pedal control is returned.
6.3.1 Speed n3 at the Start of the Seam
Function with or without control panel
Parameter
Speed for start backtack
(n3)
112
6.3.2 Stitch counting for start backtack
Function with or without control panel
Parameter
Stitch counting forwards
Number of stitches backward
(c2)
(c1)
000
001
When using a control panel, the function "HIT" can be used for quick information for the user. When the start
backtack is turned on with key 1, the associated value is shown on the display for about 3 seconds. During this
time, the value can be varied directly by pressing key + or -.