22
(2)
Spacing X\Y:
Spacing of two neighboring circuits
(3)
Number X\Y:
Number of circuits in X\Y direction.
It is possible to skip circuits labeled by
“PCB ID” by selecting the “Add skip” button.
10.1.5. PCB
It is necessary to calibrate the position of the PCB in the machine. Two or three
calibration points are defined in the screen shown below; this number can be changed in
the “System set” menu. There are two methods to obtain the calibration points.
Figure
10.16.
Window after “Run / Edit / PCB calibrate”, listing calibration points.
(1)
Components:
The software automatically selects components and obtains their
coordinates from the PCB file. In the designator column, the number after
“P”
indicates the batch PCB ID,
“E” gives the component ID, and the string after “:” is
the component designation. Alignment then uses these components;
(2)
Marks:
The user selects two specific coordinates of the PCB. Fiducials on the
PCB or board corners are typically used here;
(3)
Calibrate:
As show below, the calibration points are selected for visual centering
at those points. When selecting each button, a window opens as for component
calibration. Arrows adjust the stage to center the mark, and set is clicked to
record the offset. Although this calibration does not update the centering in
subsequent PCB calibrations, its effect can be checked by editing a component
