Abstract: A welding or additive manufacturing power supply includes output circuitry configured to generate a welding waveform, a current sensor for measuring a welding current generated by the output circuitry, a voltage sensor for measuring an output voltage of the welding waveform, and a controller operatively connected to the output circuitry to control the welding waveform, and operatively connected to the current sensor and the voltage sensor to monitor the welding current and the output voltage. A portion of welding waveform includes a controlled change in current from a first level to a second level different from the first level. The controller is configured to determine a circuit inductance from the output voltage and the controlled change in current, and further determine a change in resistance of a consumable electrode in real time based on the circuit inductance.

Abstract: An electronic device includes a housing having a sidewall defining an internal volume, a display secured to the housing, a camera assembly disposed in the internal volume between the display and the sidewall, a spring finger biasing the camera assembly away from the sidewall, and a compression block disposed between the camera assembly and the sidewall.

Abstract: Embodiments of systems and methods in pulsed arc welding. A robotic welding system, having a welding torch with a contact tip, is configured to perform the following method: (a) generate and output a series of a determined number of welding output pulses as a welding wire electrode is fed toward a workpiece; (b) stop generating welding output pulses while allowing the welding wire electrode to continue to be fed toward the workpiece in an attempt to electrically short to the workpiece; (c) attempt to confirm that the welding wire electrode has electrically shorted to the workpiece within a determined error time period; and (d) repeat steps (a) through (c) if electrical shorting of the welding wire electrode has been confirmed within the determined error time period, else, shut down the robotic welding system to avoid damaging the welding torch.

Abstract: Embodiments of welding systems and methods for reducing spatter in pulsed welding are disclosed. A welding power source includes a first welding output stud to be electrically connected to a consumable welding electrode and a second welding output stud to be electrically connected to a workpiece. Power electronics generate welding output current pulses. A switching network is connected between the power electronics and the first welding output stud. A controller is connected between the power electronics and the switching network. The controller controls the timing of each welding output current pulse and switches the switching network back and forth between a first welding output current flowing state and a second welding output current impeding state based on the timing. An increase in a decay rate of a trailing edge of each welding output current pulse is effected during the second welding output current impeding state.

Abstract: A welding or additive manufacturing power supply includes output circuitry configured to generate a welding waveform, a current sensor for measuring a welding current generated by the output circuitry, a voltage sensor for measuring an output voltage of the welding waveform, and a controller operatively connected to the output circuitry to control the welding waveform, and operatively connected to the current sensor and the voltage sensor to monitor the welding current and the output voltage. A portion of welding waveform includes a controlled change in current from a first level to a second level different from the first level. The controller is configured to determine a circuit inductance from the output voltage and the controlled change in current, and further determine a change in resistance of a consumable electrode in real time based on the circuit inductance.

Abstract: A welding system includes a consumable electrode, torch, wire feeder, and power supply. The power supply is configured to provide a plurality of waveforms to the torch to generate a welding current in the electrode. Each of the plurality of waveforms includes a pinch current portion followed by an arcing current portion, and the pinch current portion is preceded by a first arc suppression portion and the arcing current portion is followed by a second arc suppression portion. An arc exists between the electrode and a workpiece during the arcing current portion, and an air gap without an arc exists between the consumable electrode and the workpiece during the arc suppression portions. The power supply is configured to detect a short between the electrode and workpiece and generate the pinch current portion when the short is detected, and the wire feeder stops feeding the electrode when the short is detected and restarts feeding the electrode after the short is clear.

Abstract: A welding or additive manufacturing power supply includes output circuitry configured to generate a welding waveform, a current sensor for measuring a welding current generated by the output circuitry, a voltage sensor for measuring an output voltage of the welding waveform, and a controller operatively connected to the output circuitry to control the welding waveform, and operatively connected to the current sensor and the voltage sensor to monitor the welding current and the output voltage. A portion of welding waveform includes a controlled change in current from a first level to a second level different from the first level. The controller is configured to determine a circuit inductance from the output voltage and the controlled change in current, and further determine a change in resistance of a consumable electrode in real time based on the circuit inductance.

Abstract: A system and method generates a short circuit arc welding waveform output, having a pinch phase with a break point and a necking threshold, between a welding electrode and a work piece during a short circuit arc welding process. A necking threshold energy and a break point energy of the short circuit arc welding waveform output are monitored during the short circuit arc welding process, and a running average of the necking threshold energy is generated. An actual pinch energy relationship value is calculated based on the running average of the necking threshold energy and the break point energy, and is compared to a previously specified pinch energy relationship value. The break point energy of the short circuit arc welding waveform output is adjusted in response to the comparison to maintain the actual pinch energy relationship value to be at the specified pinch energy relationship value.

Abstract: The present disclosure is directed to the use of additive manufacturing, and in particular, a fused deposition modeling (FDM) process, in the production of fabrics. More specifically, the present disclosure is directed to the use of additive manufacturing to fabricate three-dimensional elements on a fabric support structure. Also disclosed are methods for determining the spatial relationship between a fabric support structure and a print head used in additive manufacturing.

Abstract: A shielded metal arc welding system includes a stick electrode holder, a stick electrode clamped by the holder, and a welding power supply operatively connected to the holder and configured to supply a welding current to the electrode through the holder. The power supply includes a memory storing both of a short circuit threshold voltage level and an arcing threshold voltage level. A welding voltage level is detected during an initial shorting of the electrode to a workpiece for commencing a welding operation. Both of the short circuit threshold voltage level and the arcing threshold voltage level are adjusted based on the detected welding voltage level. A short circuit clearing routine is activated when the welding voltage level is equal to or less than the adjusted short circuit threshold voltage level, and deactivated when the welding voltage level is equal to or greater than the adjusted arcing threshold voltage level.

Abstract: A welding or additive manufacturing system includes a contact tip assembly having first and second exit orifices. A wire feeder is configured to deliver a first and second wire electrodes through the exit orifices. An arc generation power supply is configured to output a current waveform to the wire electrodes simultaneously, through the contact tip assembly. The current waveform includes a bridging current portion, and a background current portion having a lower current level than the bridging current portion. The bridging current portion has a current level sufficient to form a bridge droplet between the wire electrodes before the bridge droplet is transferred to a molten puddle during a deposition operation. Solid portions of the wire electrodes do not contact each other during the deposition operation. The bridge droplet is transferred to the molten puddle during a short circuit event between the molten puddle and the wire electrodes.

Abstract: A portable computing device is disclosed. The portable computing device can take many forms such as a laptop computer, a tablet computer, and so on. The portable computing device can include at least a single piece housing. The single piece housing can be machined from a single billet of material, such as a billet of aluminum. The single piece housing can include ledges with a surface receiving a trim bead and a cover. Corner brackets can be attached to the single piece housing to improve the damage resistance of the housing.

Abstract: An isolation system and method are disclosed. The isolation system includes a beam that includes a first end and a second end. The isolation system may include at least one clamping block comprising first elastomeric material, and the first end may be coupled with the first elastomeric material by the at least one clamping block. An end condition of the buckling beam may be varied based on compression stiffening of the first elastomeric material.

Abstract: A welding or additive manufacturing power supply includes a user interface that receives a user input shielding gas mixture comprising separately adjustable amounts of a first and a second shielding gas. Output circuitry generates a shielding gas customized welding waveform. A memory stores a first plurality of waveform parameters that are associated with the first shielding gas, and a second plurality of waveform parameters that are associated with the second shielding gas. A controller is operatively connected to control operations of the output circuitry, and is configured to determine a third plurality of waveform parameters at least partially defining the shielding gas customized welding waveform. The controller determines the third plurality of waveform parameters from the first and second plurality of waveform parameters and the amounts of the first and second shielding gas.

Abstract: Embodiments of welding systems and methods for reducing spatter in pulsed welding are disclosed. A welding power source includes a first welding output stud to be electrically connected to a consumable welding electrode and a second welding output stud to be electrically connected to a workpiece. Power electronics generate welding output current pulses. A switching network is connected between the power electronics and the first welding output stud. A controller is connected between the power electronics and the switching network. The controller controls the timing of each welding output current pulse and switches the switching network back and forth between a first welding output current flowing state and a second welding output current impeding state based on the timing. An increase in a decay rate of a trailing edge of each welding output current pulse is effected during the second welding output current impeding state.

Abstract: A welding or additive manufacturing system includes a contact tip assembly having first and second exit orifices. A wire feeder is configured to deliver a first and second wire electrodes through the exit orifices. An arc generation power supply is configured to output a current waveform to the wire electrodes simultaneously, through the contact tip assembly. The current waveform includes a bridging current portion, and a background current portion having a lower current level than the bridging current portion. The bridging current portion has a current level sufficient to form a bridge droplet between the wire electrodes before the bridge droplet is transferred to a molten puddle during a deposition operation. Solid portions of the wire electrodes do not contact each other during the deposition operation. The bridge droplet is transferred to the molten puddle during a short circuit event between the molten puddle and the wire electrodes.

Abstract: The present disclosure presents a process of forming an aqueous ink onto an ink receptive laminate of a liquid impermeable absorbent article film by ink-jet printing. The process generally includes the steps of corona treating the laminate, applying meltblown fiber onto the laminate and applying ink droplets that are smaller than the meltblown fiber onto the fiber and laminate. An ink-jet printed laminate is also disclosed.

Abstract: A welding or additive manufacturing power supply includes output circuitry configured to generate a welding waveform, a current sensor for measuring a welding current generated by the output circuitry, a voltage sensor for measuring an output voltage of the welding waveform, and a controller operatively connected to the output circuitry to control the welding waveform, and operatively connected to the current sensor and the voltage sensor to monitor the welding current and the output voltage. A portion of welding waveform includes a controlled change in current from a first level to a second level different from the first level. The controller is configured to determine a circuit inductance from the output voltage and the controlled change in current, and further determine a change in resistance of a consumable electrode in real time based on the circuit inductance.

Abstract: Embodiments of systems and methods related to pulsed arc welding are disclosed. A robotic welding system, having a welding torch with a contact tip, is configured to perform the following method: (a) generate and output a series of a determined number of welding output pulses as a welding wire electrode is fed toward a workpiece; (b) stop generating welding output pulses while allowing the welding wire electrode to continue to be fed toward the workpiece in an attempt to electrically short to the workpiece; (c) attempt to confirm that the welding wire electrode has electrically shorted to the workpiece within a determined error time period; and (d) repeat steps (a) through (c) if electrical shorting of the welding wire electrode has been confirmed within the determined error time period, else, shut down the robotic welding system to avoid damaging the welding torch.

Abstract: A portable computing device is disclosed. The portable computing device can take many forms such as a laptop computer, a tablet computer, and so on. The portable computing device can include at least a single piece housing. The single piece housing can be machined from a single billet of material, such as a billet of aluminum. The single piece housing can include ledges with a surface receiving a trim bead and a cover. Corner brackets can be attached to the single piece housing to improve the damage resistance of the housing.