Southern Machinery

The single moveable unit that is populated with components. Includes printed circuit boards (PCBs) and substrates. See also circuit, pallet

A reference point on a board from which all board coordinates are measured. Usually lower left corner of board, but can be anywhere on the board

Smallest functional unit that is populated with components. A board can consist of several circuits. See also board, pallet

A dimension that defines the location of a point on a surface. A coordinate is measured from the right angle intersection of two lines. This is known as a Cartesian plane. The horizontal line is called the X axis, and the vertical line is called the Y axis. Coordinates are always displayed with the X coordinate first followed by the Y coordinate (X, Y). Typically on SMT equipment as viewed from the front, X is left to right, and Y is front to back

The distance between machine zero (known reference point on a machine) and board zero (known reference point on a board)

The distance between the board zero point and a reference point on a repeating circuit

Pallet Rectangular frame-like device used to carry a board (often odd shaped) through the assembly process. Also used to provide a common board transport width through the assembly line. See also board, circuit