A photodiode is an electronic which, when exposed to light, generates a change in its electrical resistance. When incorporated into an electronics circuit, it can generate a signal when exposed to the right amount of light. The Xiris Weld Cameras are equipped with photodiodes to detect the presence of a weld arc.
Using Xiris WeldStudio software, the photodiode circuit can be used to toggle the operating mode of a weld camera from “NO WELD” mode to “WELD” mode or vice versa, based on the amount of light present in the weld environment. As a result, two sets of parameters can be defined, each associated with one of the two camera modes. Of the many parameters that can be defined, there is the shutter mode, which can be set typically for Rolling shutter in the NO WELD mode and Global shutter in the WELD mode. Toggling between the two modes can happen automatically by enabling the Auto Weld Mode option in the WeldStudio software.
The photodiode sensitivity threshold can be adjusted from within the WeldStudio software to ensure that the NO WELD/WELD triggers on the right amount of light coming from the weld process. When light is emitted from the welding process, the photodiode will activate, toggling the software from NO WELD to WELD mode. When the welding process ceases, the lack of light will have the opposite effect.
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