Operation Manual – TEXI 781 SERVO
(Action sequence): Upper thread scissors action
Lower thread lever action
Lower line
moving knife action
<Upline scissors action>------ Cut section thread
<Lower thread lever action>------Pull out the lower thread required for the initial seam and pull
in the remaining upper thread
< Lower line moving knife action>------ cut the lower line while the presser foot starts to rise 6.
Lower thread tension spring
Loosen its fixing screw to adjust its installation position so that the “R” part of the lower thread
lever is at the center of the clip spring, and the lower thread clamp spring is pulled to gently press
the lower thread.
7. Adjustment of the bobbin pressure bar device
The bobbin presser device is in synchronous connection with the bottom thread trimming device.
When the lower thread is plucked, the bobbin pressure bar presses the bobbin on the back to
prevent idling, and at the same time, the upper thread remaining on the cloth is pulled down to
the cloth, and a certain amount of lower thread is ensured to prevent the needle from jumping at
the beginning of the seam. Off the line.
Adjustment method:
(1)
If the lower thread is cut short, the pressure of the bobbin is too strong. At this time, the
adjusting screw can be loosened to weaken the pressure of the top spring. On the contrary, the
adjustment screw is tightened.
