When changing the line of a machine, it is often necessary to incorporate the program into the machine's calibration coordinates. How to quickly calibrate the coordinates to save time for changing the line is a problem that needs to be considered.

There are several ways to obtain coordinates during programming:

1、 Grab coordinates using the Gerber file provided by the customer;

2、 The XY coordinate file provided by the customer;

3、 Export coordinates from the client's design software using DXP software;

4、 After scanning the PCB substrate, use software to grab the coordinates.

For the first method, when grabbing the coordinate document, the MARK points are grabbed together, and then imported into the programming software CPS. After using the obtained MARK points to complete the overall correction of the base point on the machine, the program coordinates are corrected.

For the coordinates obtained by the second and third methods, there is no MARK point coordinate. This requires grasping the MARK point coordinates on the machine, and there is a way to parallel the program's coordinate system with the machine's coordinate system in order to make overall corrections in the installation coordinates.

The current practice is to manually move the PCB board into the machine after adjusting the track width. Use your hand to press the edge of the PCB board against the track edge of the machine, then clamp the PCB board and enter the program editing. Using the coordinates of a part (R1) as a reference, the difference in coordinates after machine correction (R1) is the overall correction value of the PCB. Without removing the PCB, grab the coordinates of the MARK point, and then associate the MARK point with the mounting coordinates for optimization to complete the correction of coordinates.

In practice, using this method, for components 0603 and above, there is no need to teach them separately after one correction. For components 0402 and below, a single inspection is required because this method assumes that the PCB board edge is absolutely straight and smooth, but if there is a slope on the PCB board edge, the corrected coordinates will have errors for components 0402 and below.

Another method is for PCB boards with a large number of splices. Firstly, make a fixture board, fix the PCB board on the fixture board, and the PCB board can move on the fixture board. Use a machine camera to check and correct whether the PCB coordinate system board is parallel to the machine coordinate system. The inspection method is to take the area at the bottom right corner of the PCB board as the first area, find a certain corner of the standard pad R1 (with a smooth appearance and easy to identify) on the first area, read its coordinates (X1, Y1), and then move the camera in the X direction to the same angle of the pad R1 at the bottom left corner of the PCB board, read its coordinates (X2, Y2). When X1=X2, Y1=Y2, the coordinate system of the PCB board is parallel to the coordinate system of the machine, At this point, go back to the installation and correction. When this method is used for components up to 0402, it can avoid errors on the edges of PCB boards.

For the fourth scenario, due to errors in manually grasping the coordinates after scanning the PCB board, it is completely necessary for the machine to correct the coordinates individually. It is only applicable to red adhesive boards and some PCB boards without PCB board design files and with fewer parts.