4.4 Setting the Underthread Counter
The underthread counter is set in program 41.
The presetable decrementer monitors the underthread reserve.
The decrementer works with the factor 10, this means, after every 10th
stitch the preset value is decreased by 1. This is shown in the right
half of the lower line of the display.
The size of the initial value to be selected depends on the following
factors:
–
Thickness of the underthread used
–
Thread tension during winding
–
Material thickness
Setting the initial value
–
Set the " Program " switch to " 41 ".
–
Press the " STOP " key.
The program is activated.
The preset value appears in the lower line of the display.
The current position to be changed blinks.
–
Set the desired value for each position with the " + " or the " - " key.
–
The next higher position is selected with the "
Σ
" key.
–
By operating the " + " and " - " keys at the same time the counter is
reset to 0000.
ATTENTION !
By setting the value to 0000 the underthread monitoring through
the counter is turned off and the automatic remaining thread
monitor activated.
4.5 Setting the Remaining Thread Monitor
Program 42 serves for the alignment of the reflected light barrier.
–
Set the " Program " switch to " 42 ".
–
Press the " STOP " key.
The program is activated.
With correct alignment of the light barrier a reflection occurs with
the turning of an empty bobbin.
Reflexion
No reflexion
ATTENTION !
The remaining thread monitor is only effective when the value for the
underthread counter was set to 0000 in program 41.
13
Summary of Contents for class 743-221
Page 2: ......
