Methods and apparatus to synergically control a welding-type output during a welding-type operation are disclosed. An example welding-type power supply includes a power conversion circuit configured to convert input power to welding-type power and to output the welding-type power to a welding-type torch; a communication circuit configured to receive a control signal from a remote-control device during a welding-type operation; and a control circuit configured to synergically control at least two of a voltage of the welding-type power output by the power conversion circuitry, a current of the welding-type power, or a wire feed speed.

A data structure for weld programs associates configuration data for a welding system with a plurality of weld programs and weld sequence data. The data structure allows the welding system to be configured for a particular part, operator, or stage in a welding process, and to be easily reconfigured when the part, operator, or stage changes, providing improved efficiency and flexibility in operation.

The subject innovation described herein generally pertains to a system and method for security features for a device in which functionality of the device can be limited or restricted in accordance with one or more security layers. To access functionality of the device, an appropriate security-related input is required.

An apparatus to provide welding power. The apparatus may include a direct current-alternate current (DC-AC) power converter to output a primary current and a transformer stage. The transformer stage may include at least one power transformer to receive the primary current from the (DC-AC) power converter on a primary side of the transformer stage and to output a first voltage through a first rectifier and a first set of secondary windings disposed on a secondary side of the transformer stage. The transformer stage may further include an auxiliary set of secondary windings disposed on the secondary side to output a second voltage. The apparatus may also include a pair of active unidirectional switches disposed on the secondary side to receive the second voltage from the auxiliary set of secondary windings.

A machine tool includes a first machining head which is configured to support a wire such that a tip end of the wire is exposed from the first machining head and via which a molten material produced from the tip end is provided to the workpiece supported by a table, a second machining head configured to support a tool to cut the workpiece, a power supply configured to supply a current to the wire, a conduction block disposed on the table to detect a position of the tip end, a drive device configured to relatively move the first machining head with respect to the table to bring the tip end of the wire into contact with the conduction block, and a first electric circuit configured to be changed from an open state to a closed state by bringing the tip end into contact with the conduction block.

An apparatus for generating arc image-based welding quality inspection model is disclosed. The apparatus includes: a hall sensor for measuring a welding current flowing in a base metal through an arc welding machine; a voltage meter for measuring a welding voltage through a circuit generated between the arc welding machine and the base metal; a camera for capturing an image of a welding target area on which the arc welding machine performs welding; and a model generator configured to: identify a welding state based on the welding current measured using the hall sensor and the welding voltage measured using the voltage meter; obtain an arc image based on the image captured; associate the obtained arc image with a welding quality identified based on the arc image to generate a dataset; and apply the generated dataset to a deep-learning model to generate an arc image-based welding quality inspection model.

Methods and apparatus to communicate via a welding arc are disclosed. An example welding-type power supply includes a power converter, a weld monitor, and an arc modulator. The power converter outputs welding power to sustain a welding-type arc at a welding-type torch. The weld monitor monitors one or more aspects of a weld performed using the welding-type arc and the welding-type torch, and selects an audio message based on the one or more aspects. The arc modulator configured to modify the welding-type arc to output the selected audio message as a plasma speaker.

An example welding-type system includes: power conversion circuitry configured to convert input power to welding-type power; an interface configured to: receive a selection of a parameter from a plurality of parameters; and receive a selection of a value for the selected parameter; and control circuitry configured to: in response to the selection of the parameter from the plurality of parameters, control the interface to output a visual indication of an effect of changing the parameter on at least one of a welding electrode, a quantity of discontinuities in the weld, a magnitude of a discontinuity in the weld, or a quantity of inclusions in the weld; in response to a change in the value of the selected parameter via the interface, control the interface to change the visual indication of the effect based on the change in the value; and control the power conversion circuitry based on the value.

A dual-pulse MIG welding power source based on SiC power devices may include a main circuit and a digital control circuit. The main circuit may include a power frequency rectifier filter module, a first SiC high frequency inverter module, a first high frequency transformer, and a first SiC fast full-wave rectifier filter module connected sequentially. The power frequency rectifier filter module may be connected to a three-phase AC power supply, and the first SiC fast full-wave rectifier filter module may be connected to a load. The digital control circuit may include a digital human-machine interaction module, a core control module, a SiC high-frequency drive module, a load voltage and current detection feedback module, and a wire feeding control module. The digital human-machine interaction module may be connected to the core control module.

A method is performed in a welding or cutting system, including a power supply to deliver a current through a weld circuit to a welding torch to create an arc. The method includes: measuring the current to produce a measured current; measuring a voltage on a sense point of the power supply or the weld circuit that is spaced from the welding torch, to produce a measured voltage that differs from the arc voltage by a voltage drop caused by the current and inductance of the weld circuit; compensating the measured voltage for the voltage drop using the measured current and an inductance value, to produce a compensated voltage; computing a derivative of the compensated voltage; computing a second derivative of the measured current; and upon determining the inductance value and the inductance differ based on the derivative and the second derivative, adjusting the inductance.