Inkjet printing positioning device and control method thereof
This invention provides an inkjet printing positioning device and control method thereof. The inkjet printing positioning device comprises: base; linear guide rail fixedly mounted on the base; inkjet unit, moving in matched manner with the linear guide rail; ball screw, driving the inkjet unit to move linearly when being rotated; servomotor, for driving the ball screw to rotate; zero position detecting device, mounted in a position on the moving travel route of the inkjet unit from the initial position to the printing area, and for sending zero position signal when detects that the inkjet unit is passing by; controller connecting the zero position detecting device and the servomotor, and for controlling the servomotor to drive the inkjet unit to move from the current position to the printing area and locate there, and controlling the servomotor to drive the inkjet unit to move predetermined displacement upon receipt of zero position signal.
1. An inkjet printing positioning device comprising: a base; a linear guide rail, which is fixedly mounted on the base; a inkjet unit, which moves in a matched manner with the linear guide rail, further comprising:
a ball screw, which is used to drive the inkjet unit to move linearly when being rotated;
a servomotor, which is used to drive the ball screw to rotate;
a zero position detecting device, which is mounted in a position on the moving travel route of the inkjet unit from the initial position to the printing area, and used for sending a zero position signal when detects that the inkjet unit is passing by; and
a controller, connecting the zero position detecting device and the servomotor, for controlling the servomotor to drive the inkjet unit to move from a current position to the printing area and locate there, and the controller controls the servomotor to drive the inkjet unit to move a predetermined displacement when a zero position signal is received by the controller.
2. The device according to claim 1 , further comprising a first block provided on the inkjet unit, with the zero position detecting device comprising:
a first photoelectric switch, which is mounted on the base, in a position on the moving travel route of the first block, and the first photoelectric switch has a slot to which the first block can be fitted in and pass through.
3. The device according to claim 2 , further comprising:
an initial stopper, which is mounted between the first photoelectric switch ( 2 ) and an initial position on the moving travel route of inkjet unit, with the initial stopper used to send an initial position signal when the inkjet unit passing by is detected;
the controller further connecting the initial stopper, used for firstly controlling the servomotor to drive the inkjet unit to move towards the initial stopper, then controlling the servomotor to drive the inkjet unit to move towards the printing area when the initial position signal is received.
4. The device according to claim 3 , wherein the initial position detecting device comprises:
a second photoelectric switch, which is mounted on the base, located in a position on the moving travel route of the first block, and the second photoelectric switch has a slot to which the first block can be fitted in and pass through.
5. The device according to claim 3 , wherein when the initial position signal is received by the controller, the servomotor is controlled to change direction.
6. The device according to claim 2 , further comprising:
an end position stopper, which is located at the end position of the motion of the inkjet unit subtracting a safety margin, used for sending an end position signal when the inkjet unit passing by is detected; and
the controller also connecting the end position stopper, for controlling the servomotor to stop when receiving the end position signal.
7. The device according to claim 6 , further comprising a second block provided on the inkjet unit, with the distance between the second photoelectric switch and the first photoelectric switch being less than the distance between the first block and the second block; and wherein the end position stopper comprises:
a third photoelectric switch, which is mounted on the base, located on the moving travel route of the second block; and a slot is provided on the third photoelectric switch, to which the second block can be fitted in and pass through.
8. A method of controlling an inkjet printing positioning device, with the positioning device comprising: a base; a linear guide rail, which is fixedly mounted on the base; an inkjet unit, which moves in a matched manner with the linear guide rail; a ball screw, which drives the inkjet unit to move linearly when being rotated; a servomotor, which is used for driving the ball screw to rotate; a zero position detecting device, which is mounted in a position on the moving travel route of the inkjet unit from the initial position to the printing area, and used for sending a zero position signal when detects that the inkjet unit is passing by; a controller, connecting the zero position detecting device and the servomotor, the method comprising:
controlling the servomotor to drive the inkjet unit to move from the current position to the printing area and locate there, and the controlling the servomotor driving the inkjet unit to move a predetermined displacement when the zero position signal is received.
9. The method according to claim 8 , wherein a first block is provided on the inkjet unit, and the zero position detecting device comprises:
a first photoelectric switch, which is mounted on the base, located in a position on the moving travel route of the first block, the first photoelectric switch has a slot to which the first block can be fitted in and pass through.
10. The method according to claim 9 , wherein the positioning device comprises an initial stopper, which is mounted between the first photoelectric switch and an initial position on the moving travel route of the inkjet unit, the initial stopper is used for sending an initial position signal when the inkjet unit passing by is detected; the controller further connects the initial stopper, the positioning process for the controller controlling the servomotor to drive the inkjet unit to move from the current position to the printing area comprises:
firstly, the controller controls the servomotor to drive the inkjet unit to move towards the initial stopper; then, when the initial position signal is received, the controller controls the servomotor to drive the inkjet unit to move towards the printing area.
11. The method according to claim 8 , wherein the positioning device further comprises: an end position stopper, which is located at the end position of the motion of the inkjet unit subtracting a safety margin, for sending an end position signal when the inkjet unit passing by is detected; the controller also connects with the end position stopper, and the method further comprises:
controlling the servomotor to stop when the end position signal is received.