promelectroavtomat M3000C, Service Manual

Page: 9 / 67

-7-
8. OTHER ELECTRONIC COMPONENT FUNCTIONS
Start/stop switch ...................................used to start and stop (SS) the machine. If you want to start sewing at low
speed, keep this switch depressed and start sewing.
Backstitch switch ..................................used for backstitching and lockstitching. Backstitching is performed at low
speed in the reverse direction while the switch is pressed. For
lockstitching, three stitches are made at the current needle position and
then sewing stops.
Needle position (UP/DOWN) switch.....used to change the needle position either up or down.
Automatic thread cutter switch .............used to cut the thread automatically. When you press this switch, the
machine will automatically cut the thread, regardless of the needle
position, and stop with the needle at its upper position.
Touch panel..........................................used to select pattern and input test mode number required for sewing by
simply touching the display on the panel. This simplifies the operation for
selecting the desired pattern and number.
Buttonhole stitch switch........................used to detect the edges of the buttonhole stitch by means of the
buttonhole stitch presser foot and lever.
Buttonhole stitch lever switch ...............used to detect whether the buttonhole stitch lever is raised or lowered.
Speed sensor .......................................used to detect the rotation speed of the main motor. detects the operating
speed of the main motor by means of a photointerruptor and shutter
installed on the upper shaft.
Bobbin winder start stop switch............used to start stop the bobbin winding.
Bobbin winder switch............................used to detect whether the bobbin winder has been set when winding the
lower thread.
Foot controller jack ...............................when using the foot controller, connect it to this terminal.
Transformer..........................................used for driving the pulse motors and solenoids, to illuminate the lamps
and to supply power to the electronic circuitry.
Light bulb..............................................is 12V 5W.
www.promelectroavtomat.ru