Reverse Mechanism; Thread Wiper - Brother b831 Service Manual

®—T
^0
The reverse solenoid O (ON) works by micro switch O when the signal actuator bar O is pressed.
The reverse solenoid plunger O begins to operate, and the motion is conveyed to reverse levershaft O via reverse crank
O, reverse link O. and reverse lever shaft arm O-
When reverse lever shaft O rotates, the motion is conveyed to shaft and feed regulator O lever O.
The switch assembly © changes from forward stitch to backward stitch by the inclination of feed regulator ©.
(fvlovement is conveyed to switch assembly © via switch arm © by switch connecting arm ©).
a THREAD WIPER
Thread wiper L-
Thread wiper solenoid
I
—o
——@
^ —^Stopper
•Thread wiper R
After thread trimming, with the interval of 10 ~ 100
ms. thread wiper solenoid O is ON,
The thread wiper solenoid O drives thread wipers L
and R via solenoid link O' thread wiper link O-
link B O- ahd thread wiper guide O-
In case that thread wiper is OFF, thread wiper returns
to Its original position with the aid of spring O-