Instruction manual

- DA321G5321
- 27 -
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.
6.4.1 Speed n4 at the Seam End
Function with or without control panel
Parameter
End backtack speed
(n4)
113
6.4.2 Stitch Counting for End Backtack
Function with or without control panel
Parameter
Stitch counting forwards
Number of stitches backward
(c3)
(c4)
002
003
The stitches for end backtack backwards or forwards can be programmed and changed using the above
parameters directly on the control or on a connected V810/V820/V850 control panel.
When using a control panel, the function "HIT" can be used for quick information for the user. When the end
backtack is turned on with key 2 (V810) or 4 (V820/V850), 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 -.
6.4.3 Stitch correction of the double end backtack
Function with or without control panel
Parameter
Stitch correction of the double end backtack
(t9)
151
For a double end backtack, the activation time of the stitch regulator can be extended by selecting a stitch
correction time (t9) using parameter 151.
It does not apply to ornamental backtacks)
6.4.4 Double end backtack
The backward section and/or end stitch condensing will be executed for a number of stitches that can be set.
Then the stitch regulator will be disabled and the forward section and/or normal stitch condensing stitches will
be executed. The number of stitches for the two sections can be set separately.
After stitch counting (parameter 003) the trimming function will be initiated. During the entire operation the
sewing speed is reduced to speed n4,. with the exception of the last stitch, which will be performed at
positioning speed n1.
In the case of slow backtack mechanisms it is possible to delay disabling of the stitch regulator in the single and
double end backtack by the time t9 (end backtack stitch correction).
6.4.5 Single end backtack
The stitch regulator signal will be issued and the backward section will be executed. During the last stitch the
speed is reduced to positioning speed.