Efka dc1550 - Stitch Counting for Ornamental Backtack; Intermediate Backtack

- PF321A6012
- 29 -
When using the V820/V850 control panel, direct access by means of the function key (key 9) is possible.
Function with control panel
Parameter
Ornamental backtack On/Off
(-F-)
008 = 2
7.4.6.1 Stitch counting for ornamental backtack
Function with or without control panel
Parameter
number of stitches for initial ornamental backtack forwards
number of stitches for initial ornamental backtack backwards
number of stitches for final ornamental backtack backwards
number of stitches for final ornamental backtack forwards
(SAv)
(SAr)
(SEr)
(SEv)
080
081
082
083
The number of stitches for start and end ornamental backtack 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 -.
In the programmed seam, the stitch counts set up for the initial and final backtack stitch counting are used
(parameter 000-003).
7.4.7 Intermediate Backtack
Upon pressing an external key according to the pre-selection of parameters 240...249, the backtack solenoid
can be switched on anywhere in the seam and at standstill.
Function with or without control panel
Parameter
Counted manual backtack On/Off
Speed of manual backtack
Ornamental backtack On/Off
Manual ornamental backtack speed
Speed status for manual backtack
(chr)
(n13)
(SrS)
(n9)
(Shv)
087
109
135
122
145
The speed function for the manual backtack can be set using parameter 145.
145 = 0
Speed controllable by the pedal up to the set maximum speed (parameter 111)
145 = 1
Fixed speed (parameter 109) without influence by the pedal (machine stop by pressing the pedal
to the basic position)
145 = 2
Limited speed controllable by the pedal up to the set limit (parameter 109)
Intermediate backtack (parameter 135 = 0):
Backward sewing with speed limitation according to the setting of parameter 109 is performed when the key is
held down.
Intermediate ornamental backtack (parameter 135 = 1):
By pressing the key in the seam, the drive stops and the backtack solenoid is activated. The speed limitation n9
according to the setting of parameter 122 is effective during the entire intermediate backtack operation.
Backward sewing is performed when the key is held down and the stitches are counted. When the key is
released, the drive stops, the backtack solenoid is switched off and a forward seam is performed according to
the counted stitches after the ornamental backtack stop time. After that the speed limitation is released.
Moreover, the number of stitches for each type of backtack can be selected using Parameter 087.
087 = 0 Stitches
Normal manual backtack
087 = 1...255 Stitches
Manual backtack with counted backtack
Intermediate backtack (parameter 135 = 0) with counted backtack section (parameter 087 = >0):
During manual backtack the speed is n13 (parameter 109). According to the setting of parameter 145 it is pedal
controlled, fixed or limited.