Instruction manual

Instruction Manual
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6.15 Bobbin thread monitor
Function with or without control panel
Parameter
Stitch count for bobbin thread monitor (parameter 195 = 1 to 3)
Stitch count A for bobbin thread monitor (parameter. 195 = 4)
Stitch count B for bobbin thread monitor (parameter 195 = 4)
Stitch count C for bobbin thread monitor (parameter 195 = 4)
Bobbin thread monitor mode
(cFw)
(cA)
(cb)
(cc)
(rFw)
085
086
087
088
195
If the bobbin thread monitor function is turned on (parameter 195 = 1 to 4), after power is turned on the display
shows the controller type and the configured maximum speed for 1 second.
Display of maximum speed:   Control type
(e. g. 4000
RPM
)
Then the bobbin thread monitor status display appears.
Bobbin thread monitor stitch count:   Status display
(e. g. 250 stitches)
At this point (after power-on) the stitch count can be set with the +/- keys in steps of 10.
The functionDED (direct input of speed limit) is available after the first sewing start or trimming.
6.15.1 Input signals
The form of the input signal can be used to distinguish which bobbin is empty.
Right bobbin empty: = continuous signal (on for at least 1 second)
Left bobbin empty: = Frequency 5 Hz, or about 100 msec long signal
Left and right bobbins both empty: = Frequency 10 Hz, or about 50 msec long signal
6.15.2 Bobbin thread monitor function off (parameter 195 = 0)
The bobbin thread monitor function is turned off.
6.15.3 Bobbin thread monitor without stop / sewing foot down after seam end
(parameter 195 = 1)
Upon detection of an input signal after the bobbin runs empty, the bobbin thread counter is activated and the
bobbin thread monitor symbol appears on the display of the V810 or V820/V850 control panel. After the counter
runs out, the V810 control panels shows a C for the left bobbin and/or D for the right bobbin. On the V820/V850
control panel, instead of the model name, another symbol for right, left, or both is displayed. The corresponding
LEDs on the machine (right, left, or both) will continue to flash about 4 times per second. The displays will
remain in place even after the input signal is no longer applied. After the thread trimming and after the counter
runs down the sewing foot is not lifted. The sewing foot is only lifted after the pedal has been in the 0 position
and then returned to its position. The displays are removed (the flashing frequency of 4 Hz is turned off) if, after
the thread trimming and the following start of sewing, no input signal has come in after 14 stitches. The bobbin
has therefore been replaced and the bobbin thread counter is reset to zero.
6.15.4 Bobbin thread monitor with stop / sewing foot up after seam end (parameter 195 =
2)
Upon detection of an input signal after the bobbin runs empty, the bobbin thread counter is activated and the
bobbin thread monitor symbol appears on the display of the V810 or V820/V850 control panel. After the counter
runs out, the V810 control panels shows a C for the left bobbin and/or D for the right bobbin. On the V820/V850
control panel, instead of the model name, another symbol for right, left, or both is displayed. The corresponding
LEDs on the machine (right, left, or both) will continue to flash about 4 times per second, and the drive stops.
Automatic seam sections, such as seams with stitch counts or light barrier seams, will also be interrupted.
These can be ended after the pedal is moved to the 0 position and then into a forwards position.
4000 dA321G
250 --II--