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
34
Intermediate ornamental backtack:
By pressing the key in the seam, the drive stops and the backtack solenoid is activated. The speed limitation according to
the setting of parameter 288 is effective during the entire intermediate backtack operation. Backward sewing is performed
when the key is pressed down and the stitches are counted. When releasing the key, the drive stops, the backtack solenoid is
disabled and a forward seam is performed according to the counted stitches after the ornamental backtack stop time. After
that the speed limitation is released.
6.13 Backtack Suppression/Recall
Effective in standard and ornamental backtack
The next backtack operation can be suppressed or recalled once by pressing an external key on socket A/14-33. This is
acknowledged by a light emitting diode connected to socket A/24. It goes off when the backtack function is completed or
the key is pressed again.
Function Parameter
Backtack suppression/recall, function of the key on socket D/3 (Fc3) 147 = 2
Upon pressing Start backtack Start backtack End backtack End backtack
On On On On
Before start of No backtack Backtack --- ---
seam
In the seam --- --- No backtack Backtack
The double backtack is performed in the above cases.
See List of Parameters chapter Connection Diagram!
6.14 Holding Power of the Stitch Regulator Solenoid
Function Parameter
Time of full power (t10) 212
Holding power of the stitch regulator solenoid (t11) 213
The stitch regulator solenoid is engaged by full power. Then the system switches automatically to partial power in order to
reduce the load for the control and the connected solenoid. Set the duration of full power using parameter 203 and the
partial holding power using parameter 204.
Stage Duty ratio (ED) Effect
1 12.5 % low holding power
2 25.0 %
3 37.5 %
4 50.0 %
5 62.5 %
6 75.0 %
7 87.5 %
0 100.0 % high holding power (full power)
CAUTION!
If the holding power is set too high, the solenoid and the control may be permanently
damaged. Please observe the permissible duty ratio (ED) of the solenoid and set the
appropriate value according to the table below.