Systems, methods, and apparatus to control weld current in a preheating system are disclosed. An example preheating power supply includes power conversion circuitry configured to output welding-type power via a first output power connector and a second output power connector, and a bypass path prevention circuit configured to prevent less than a threshold voltage applied to the first output power connector and the second output power connector from a different power supply from causing current to flow between the first output power connector and the second output power connector.

The invention relates to gas conducting unit for a gas-cooled plasma cutting torch, wherein the gas-conducting unit is single-part or multi-part tubular or annular. The gas-conducting unit comprises a single-part or multi-part tubular or annular gas-conducting unit body with a longitudinal axis L1. In a wall of the gas-conducting unit body, there are situated at least one opening, which is inclined by an angle δ in a range of ± 15° with respect to the longitudinal axis L1, and at least one second opening, which is inclined radially with respect to the longitudinal axis L1 or which, in a radial plane, is inclined at an angle γ in the range of ± 30°from the radial to the longitudinal axis L1.

The invention relates to a method for the dynamic feeding of shielding gas, comprising feeding a shielding gas to a component in a welding operation, sending the temperature of a region of the component; and setting a composition of the shielding gas according to the sensed temperature.

The present invention relates to a welding jig micro-cleaning apparatus, and more particularly a welding jig micro-cleaning apparatus including a housing, a sandbox connected to the housing, an air supply unit connected to the sandbox through with a hose, a blasting gun positioned in the housing, a jig fixing portion positioned at a lower first end of the blasting gun, and a controller, wherein the jig fixing portion includes a magnetic unit configured to fix a welding jig.

Systems and methods for inductance compensation in a welding-type system include a reel configured to wind a welding-type cable to reduce a first portion of the welding-type cable extending from the reel, and to unwind to increase the first portion of the welding-type cable extending from the reel, wherein a second portion of the welding-type cable is at least partially wound around the reel when stored. A controller determines a first length of the first portion of the welding-type cable, calculates a first inductance of the first portion of welding-type cable extending from the reel based on the first length, determines a second length of the second portion of the welding-type cable, calculates a second inductance of the second portion of welding-type cable wound around the reel based on the second length, and calculates a cable inductance of the welding-type cable based on the first inductance and the second inductance.

Systems and methods for inductance compensation in a welding-type system include a reel configured to wind a welding-type cable to reduce a first portion of the welding-type cable extending from the reel, and to unwind to increase the first portion of the welding-type cable extending from the reel, wherein a second portion of the welding-type cable is at least partially wound around the reel when stored. A controller determines a first length of the first portion of the welding-type cable, calculates a first inductance of the first portion of welding-type cable extending from the reel based on the first length, determines a second length of the second portion of the welding-type cable, calculates a second inductance of the second portion of welding-type cable wound around the reel based on the second length, and calculates a cable inductance of the welding-type cable based on the first inductance and the second inductance.

In a method for scanning the surface of metallic workpieces, during scanning, a welding torch with a consumable welding wire is moved over and towards the workpiece surface, until contact of the welding wire with the workpiece is detected, and the welding wire is subsequently moved away from the workpiece. Before scanning, slag-removal is carried out to remove slag at the welding wire end, wherein the welding current is lowered to a minimum, and the welding wire is moved cyclically with a rapid recurrent forward/backward movement over a specified path length toward the workpiece, and by a smaller distance away from the workpiece, until a short circuit between the welding wire and the workpiece is detected, whereupon slag-removal is ended, and upon the detection of no short circuit, slag-removal is repeated, and upon the detection of several short circuits one after the other, slag-removal is ended.

A method and apparatus for monitoring weld cell and related activity is disclosed. The activity is sensed using a variety of sensors, and reported to the controller, or to a remote location.

A method and apparatus for monitoring weld cell and related activity is disclosed. The activity is sensed using a variety of sensors, and reported to the controller, or to a remote location.

A machine tool arranged to deliver an energy source through a processing head onto a work-piece, wherein; the machine-tool has a clamping mechanism arranged to temporarily receive the processing-head, or another machining or processing-head, to process a work-piece; the processing-head comprising one or more guiding mechanisms arranged to direct the energy source onto a work-piece and a processing-head docking-manifold arranged to have connected thereto one or more media to be, in use, supplied to the processing-head to facilitate processing of the work-piece; wherein the processing-head docking-manifold allows the one or more media to be supplied to the processing-head when the processing-head is connected to the clamping mechanism; and wherein the machine-tool also comprises at least one mechanism arranged to move a supply docking-manifold into and/or out of connection with the processing-head docking-manifold such that when the two manifolds are connected the or each media is supplied to the processing head.