Patent ID: 8461472

Claim:
A welding machine, comprising: a machine frame having an opening permitting access to an interchangeable tooling module having one or more weld tooling stations installed on said machine; a selector arm attached to the machine frame at a location between a first end of the opening and a second end of the opening, the selector arm being movable from a first position away from the opening to a second position at the opening; wherein, when the selector arm is in the first position, a first light curtain spans the opening; wherein, when the selector arm is in the second position, a first portion of the opening is defined by the first end of the opening and the selector arm, and a second portion of the opening is defined by the second end of the opening and the selector arm, and a second light curtain spans the first portion of the opening, and a third light curtain spans the second portion of the opening; and wherein the selector arm can be placed in the first position to enable use of the first light curtain with the interchangeable tooling module and can be placed in the second position to enable use of the second and third light curtains with one or more interchangeable tooling modules having two weld tooling stations that are each independently accessible via one of the first and second portions of the opening.