- PCB Origin:
Board outline and details with all required dimensions and tolerances, such as the exact thickness, length, and width of the board.
Generally, this kind of information is defined as board origin. Its value is the distance between the PCB origin and the positioning column.
In principle, we can locate the origin at any position on the PCB surface, for instance, if its coordinate is (0.0), which means it overlaps with the center of the positioning column.
One thing we should pay attention to is that if the machine transferring direction is from right to left, the coordinate of the PCB location hole that is corresponding with the center of the positioning column is (5.00mm, 5.00mm) at its bottom-left corner.
Usually, the (0,0) is used as the origin coordinate, but other values are also acceptable.
For example, here is one board with a size of 300mm*200 and the machine transferring direction is from right to left, we can set the coordinate of the origin at (295.00, -5.00), which means the origin is at the right-bottom corner of the PCB.
Again for instance, if the conveyor direction is from left to right, (-295.00 -5.00) means the origin is at the left corner of this PCB.
- Joint Panel Origin:
Besides, there is also the joint panel in SMT production, we name its origin as block origin.
The origin of the panel is the origin of all the small boards, in theory, just like the normally printed circuit board, the origin of the joint panel also can at any position, and the joint panel uses the PCB origin as its.
If the coordinate of the joint panel is (0.0), which means the origin of the joint panel overlaps the PCB’s.
What is more, it is better to select a center of a corner of one pad on the small board as the origin of the panel, rather than use the silkscreen characters or the center of a hole.
Joint Panel Origin
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