Instruction Manual
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The start backtack/start stitch condensing stitches with or without stitch regulator can be programmed and
varied using the above parameters directly on the control or on a connected V810/V820/V850 control panel.
For fast operator information (HIT) when using the V820/V850 control panel, the value of the function switched
on using key
1
can be displayed for approx. 3 seconds. During this time, the value can be varied directly by
pressing key
+
or
-
.
7.4.3.3 Stitch Correction and Speed Release
Function
with
or
without
control panel
Parameter
Stitch correction time
Delay until speed release after start backtack
(t8)
(t1)
150
200
Speed release after single and double backtack can be influenced by parameter
200
.
In the case of slow backtack mechanisms it is possible to delay disabling of the stitch regulator in the single and
double start backtack by the time t8 (start backtack stitch correction) and thereby prolong the backward section.
This time-lag can be selected by means of parameter
150
.
7.4.3.4 Double start backtack
The forward section will be sewn for a number of stitches that can be set. Then the stitch regulator signal will be
issued and the backward section will be executed. The number of stitches for the two sections can be set
separately.
7.4.3.5 Single Start Backtack / Start Stitch Condensing
The stitch regulator signal will be issued and the backward section and/or start stitch condensing will be
executed for a number of stitches that can be set.
7.4.4 End Backtack / End Stitch Condensing
Function
without
control panel
Control
Single end backtack
Double end backtack
End backtack Off
LED 3 On
LED 4 On
both LEDs Off
Key
+
(S3)
End stitch condensing On; number of stitches with stitch regulator
(parameter
002
)
End stitch condensing On; number of stitches with stitch regulator
(parameter
002
) after that number of stitches with stitch regulator
(Parameter
003
)
End stitch condensing Off
LED 3 On
LED 4 On
both LEDs Off
Key
+
(S3)
Function
with
control panel
V810
V820/V850
Single end backtack
Double end backtack
End backtack Off
left-hand arrow above
key On
right-hand arrow above
key On
both arrows Off
Key 2
Key 4
End stitch condensing On; number of stitches with stitch regulator
(parameter
002
)
End stitch condensing On; number of stitches with stitch regulator
(parameter
002
) after that number of stitches with stitch regulator
(Parameter
003
)
End stitch condensing Off
left-hand arrow above
key On
right-hand arrow above
key On
both arrows Off
Key 2
Key 4
The end backtack/end stitch condensing in a seam with stitch counting starts by heelback at the end of
counting, or, from the light barrier seam at the end of the light barrier compensating stitches. The stitch regulator
is immediately enabled from machine standstill. After lowering the sewing foot, the switch-on point of the stitch
regulator is delayed by the time t3 (start delay after switching off the sewing foot lifting signal). The first leading
edge of position 1 counts as 0 stitch whenever the function is not started in position 1. The stitch regulator is
synchronized to position 1. End backtack as well as end stitch condensing are executed automatically at speed
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