Patent ID: 11911859
Assignee: ILLINOIS TOOL WORKS INC.
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A welding-type system, comprising:
a welding-type power source configured to provide welding-type power to a welding-type circuit, the welding-type circuit comprising a welding-type electrode and a first contact tip of a welding torch;
an electrode preheating circuit configured to provide preheating power through a first portion of the welding-type electrode via a second contact tip of the welding torch;
a preheat feedback circuit configured to measure a preheat voltage; and
an electrode preheat control circuit configured to:
control the preheating power based on the preheat voltage; and
disable the electrode preheating circuit in response to detecting an invalid preheat voltage for at least a threshold time, wherein detecting the invalid preheat voltage is indicative of a loss of preheat voltage feedback from the preheat feedback circuit to the electrode preheat control circuit.