1) spindle motor M1 control control line in the SB3 and SB4 is a two-place control of the start button; SB1 and SB2 is a two-place control of the stop button, which were installed in the machine tool in two places, easy to operate.
①Spindle motor M1 start before starting, close the power switch QS1, and then the multi-axis reversing switch SA4 to the spindle required direction of rotation, and then press the start button SB3 (or SB4), the coil of the contactor KM1 is electrically absorbed, the main contact KM1 closed, the spindle motor M1 start.
②Spindle motor M1 stopping brake When it is necessary to stop the spindle motor M1, press the stop button SB1 (or SB2), the contactor KM1 coil is discharged and released, and at the same time, the contactor KM2 coil is energized and absorbed, and the main contact of KM2 is closed, so that the power supply of the spindle motor M1 is changed in phase sequence, and the reversing brake is carried out.
3 impulse control when the spindle speed change impulse control when the spindle speed change, is the use of speed change handle and impulse travel switch SQ7 through the mechanical linkage mechanism for control.
2) Control of the table feed motor M2 The changeover switch SA1 controls the circular table movement, and when the circular table movement is not required, the contacts SA1-1 of the changeover switch SA1 are closed, SA1-2 is disconnected, and SA1-3 is closed.
①Table up, down and forward and backward movement control table up, down (lift) movement and forward and back (lateral) movement is completely by the "table lift and lateral manipulation handle" to control. CNC machine tool this joystick has two, respectively, installed in front of the left side of the table and rear, joystick linkage with the travel switch SQ3 and SQ4 connected to the travel switch installed on the left side of the table, the front of a SQ4, the control of the table upward and backward movement;
② table left and right (longitudinal) movement of the control of the table left and right movement is the same with the table feed motor M2 to drive by the table longitudinal manipulation handle to control. This handle is also a compound, one installed in the center of the top surface of the table base; another installed in the lower left side of the table base. The handle has three positions: rightward, leftward, and center position. When the handle is triggered to the right or left direction of movement, the linkage mechanism of the handle depresses the travel switch SQ1 or SQ2, causing the contactor KM3 or KM4 to operate to control the forward and reverse rotation of the motor M2. When the handle is pulled to the middle position, the clutch of the longitudinal drive screw is disengaged, the travel switch SQ1-1 or SQ2-1 is disconnected, the motor M2 is de-energized, and the table stops moving.
③The impulse control when the table feeds to change speed In order to make the gears easy to mesh when changing the table feed speed, it is also necessary to feed the motor M2 to impulse momentarily. When changing speed, first pull the mushroom-shaped handle outward and rotate the handle, the turntable also follows the rotation, the required feed speed scale numbers aligned with the arrow, and then pull the mushroom-shaped handle outward to the limit position and then pushed back to the original position; in the mushroom-shaped handle pulled outward to the limit position instantly, the linkage mechanism instantly presses the travel switch SQ6, so that the SQ6-2 disconnect, SQ6-1 closed, and SQ6-1 closed. When the mushroom-shaped handle is pulled outward to the limit position, the connecting rod mechanism presses the travel switch SQ6 instantaneously, making SQ6-2 disconnect, SQ6-1 close, and the coil of contactor KM4 is electrically absorbed, and the feed motor M2 reverses, because it is instantaneously connected, so the feed motor M2 is only instantaneously connected and impulsively impulsive instantaneously, so as to ensure that the gear is easy to mesh. When the handle is pushed back to the original position, the travel switch SQ6 is reset, the contactor KM4 coil is de-energized and released, and the instantaneous impulse of the feed motor M2 ends.
④ Rapid movement control of the table The rapid movement of the table is also dragged by the feed motor M2, and rapid movement control can be realized in six directions: longitudinal, transverse and vertical. Action process is as follows: (3) cooling pump motor M3 control in the spindle motor M1 start, the conversion switch SA3 closed, the contactor KM6 coil is electrically absorbed, the cooling pump motor M3 start, through the mechanical mechanism of the coolant will be transported to the cutting part of the machine tool. (3) lighting circuit machine tool lighting circuit by the transformer T2 supply 24V safety voltage, and controlled by the switch QS2.