Instruction manual
Table Of Contents
- Range of Applications
- Scope of Supply
- Operation
- Putting into Service
- Setting the Basic Functions
- Functions and Settings
- First Stitch after Power On
- Softstart
- Sewing Foot Lifting
- Sewing Foot Pressure Reduction
- Start Backtack
- End Backtack
- Start and End Backtack with Switch-On and Switch-Off Delay
- Start Ornamental Backtack
- End Ornamental Backtack
- Multiple Backtacking
- Catch backtacking
- Intermediate Backtack
- Backtack Suppression/Recall
- Holding Power of the Stitch Regulator Solenoid
- Reverse Motor Rotation
- Machine Run Blockage (Safety Switch)
- Thread Monitor
- Input Signals
- Parameter 195 = 0 – No Thread Monitor Function
- Parameter 195 = 1 – Model 270 / No Stop / Sewing Foot Down after Seam End
- Parameter 195 = 2 – Model 767, N291 / With Stop / Sewing Foot Up after Seam End
- Parameter 195 = 3 – Model 767, N291 / With Stop / Sewing Foot Down after Seam End
- Parameter 195 = 4 – With Thread Monitor Stitch Counting
- Needle Cooling
- High Lift for Walking Foot
- Manual High Lift for Walking Foot – Speed Limitation
- Maximum High Lift for Walking Foot by Using a Key
- High Lift for Walking Foot Operational Mode Not Stored (Pa. 138 = OFF, Pa. 184 = 0)
- High Lift for Walking Foot Operational Mode Stored (Pa. 138 = ON)
- High Lift for Walking Foot Operational Mode Not Stored with Minimum Number of Stitches (Pa. 138 = OFF, Pa. 184 = >0)
- Speed Limitation
- Switch Stitch Length
- Roller
- Thread Clamp
- Thread Trimming Operation
- Seam with Stitch Counting
- Free Seam and Seam with Light Barrier
- Light Barrier
- Needle Up/Down / Single Stitch
- F1/F2 Function Key Assignment on the V810/V820 Control Panels
- Signal Output Position 2
- Signal Output 512 Impulses per Rotation
- Actuator
- Acoustic Signal
- Master Reset
- Input and Output Function Test
- Error Displays
- Operating Elements of the V810 Control Panel
- Operating Elements of the V820 Control Panel
EFKA DA82GA3312
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The sewing foot pressure consists of a basic value generated by spring power and a value generated pneumatically. After
power On, the sewing foot always works at full pressure. The sewing foot pressure can be reduced by pressing the key
connected to socket D/4-15. The sewing foot pressure output is disabled. It is enabled by pressing the key again. The
reduced sewing foot pressure is indicated by a light emitting diode. At reduced sewing foot pressure the speed is limited
depending on parameter 146. Speed limitation DB2000 or DB3000 can be selected using parameter 146. Moreover, it is
possible to select inverted sewing foot pressure reduction. Normal sewing foot pressure can be enabled by pressing the key
again. The key can be pressed at any time except during automatic seams or seam sections. The sewing foot lift does not
have influence on the sewing foot pressure.
Parameter 146 = 1 Sewing foot pressure reduction with speed limitation DB2000
Parameter 146 = 2 Sewing foot pressure reduction with speed limitation DB3000
Parameter 146 = 3 Lift roller (see chapter “Roller“)
Parameter 146 = 4 Inverted sewing foot pressure reduction
6.5 Start Backtack
Functions V810/V820
Single start backtack lefthand arrow above key On Key 1
Double start backtack righthand arrow above key On
Start backtack Off both arrows Off
The start backtack 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 disabling the sewing foot lift signal). The start backtack is executed automatically
at speed n3. If softstart is running parallel, the respective lower speed is prevailing.
Whether or not an interruption of the start and end backtack is possible can be determined with parameter 284. It does not
work with the ornamental backtack.
Parameter 284 = ON Backtack can be interrupted by pedal position 0 (neutral). A separate speed using parameter
125 is available for this purpose.
Parameter 284 = OFF Automatic backtack cannot be interrupted
By pressing the pedal forward after an interrupted start backtack, the backtack can be continued; by half heelback (-1), the
the sewing foot can be lifted, or, by full heelback (-2), trimming without end backtack can be completed. The sewing foot is
not automatically lifted when interrupting the backtack.
The start backtack stitch length is set with the following parameter:
Parameter 137 = ON Backtack is performed with normal stitch length.
Parameter 137 = OFF Backtack is performed with long stitches.
The stitch length (normal or long stitches) during backtack can be selected with parameter 137. The indicator does not light
up during backtack.
Counting as well as enabling and disabling of the backtacking signal is synchronized to position 1. The backtacking signal
will be disabled after completion of the backward section (parameter 001) and start backtack speed n3 after a delay time t1.
Then pedal control is returned.
6.5.1 Speed n3 at the Start of the Seam
Functions Parameter
Start backtack speed (n3) 112
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.
6.5.2 Start Backtacking Stitch Count
Functions Parameter
Number of stitches forward (Arv) 000
Number of stitches backward (Arr) 001