Line branching printed circuit board for a computer numerical controller

Abstract

A line branching printed circuit board for a computer numerical controller designed to branch an input/output signal line connecting a computer numerical controller and a numerically controlled machine tool, and comprising a first circuit board connector (20A) coupled to a junction connector to which input/output signal lines from the computer numerical controller are connected, and a plurality of second circuit board connectors (21aA, 21bA and 21cA) which are all coupled to the junction connectors to which the input/output signal lines to the numerically controlled machine tool are connected, and having pins pattern-connected to the pins of the first circuit board connector. There is further provided a third circuit board connector (22A) having pins pattern-connected to the spare pins of the first circuit board connector (20A) and the spare pins of the plurality of the second circuit board connectors (21aA, 21bA and 21cA). A connection changing connector (22B) is attached to the third circuit board connector (22A), to determine the connection of the pins of the third circuit board connector, and by changing the connection of the connection changing connector, the connection between the computer numerical controller and the numerically controlled machine tool can be easily changed.

Dependencies are inferred from the claim text.