Patent ID: 11958141
Assignee: ILLINOIS TOOL WORKS INC.
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A welding-type power supply, comprising:
power conversion circuitry configured to convert input power to welding-type power output; and
control circuitry configured to:
while a welding arc is not present, control the power conversion circuitry to output a voltage pulse at a first voltage;
while the welding arc is not present, determine whether the power conversion circuitry outputs an output current during the voltage pulse;
in response to the welding arc not being present and the output current being less than a threshold output current during the voltage pulse, control the power conversion circuitry to turn off the welding-type power output or output a second voltage that is less than the first voltage; and
in response to determining that the power conversion circuitry outputs at least the threshold output current during the voltage pulse, control the power conversion circuitry to begin outputting the welding-type power output.