Abstract: Method for compensating an interfering influence on a welding current, provided by a welding power source (4) for welding a workpiece (3), from another welding power source (4?), comprising the steps of: (a) providing (SA) a compensation voltage (UKomp), which is calculated on the basis of a welding current progression provided by the other welding power source (4?); (b) subtracting (SB) the compensation voltage (UKomp) from a measured voltage (UMess), measured by a voltage measurement unit (8) of the welding power source (4), so as to determine a corrected measured voltage (U?Mess); and (c) regulating (SC) the welding current generated by the welding power source (4) as a function of the corrected measured voltage (U?Mess).

Abstract: A welding device allows uninterrupted welding with maximum welding quality even in the case of welding processes performed simultaneously in close proximity by several welding devices. In a normal operating mode, the control unit of the welding device ignores a first welding voltage signal of a first voltage-measuring device and uses a second welding voltage signal, detected closer to the are, of a second voltage-measuring device to determine the control parameters. The control unit detects an error state in the second welding voltage signal on the basis of the second welding voltage signal and, upon detecting the error state, switches to an emergency operating mode without interrupting the welding process. In the emergency operating mode, the control unit ignores the second welding voltage signal of the second voltage-measuring device and uses the first welding voltage signal of the first voltage-measuring device to determine the control parameters.

Abstract: To ensure safe operation of a welding apparatus, low-voltage pulses occurring on a low-voltage side of the welding apparatus are transformed into high-voltage pulses occurring on a high-voltage side of the welding apparatus, an arc is ignited between an electrode and a workpiece during an ignition mode and/or idling mode using the high-voltage pulses, provision is made, in the ignition mode and/or in the idling mode, for a time window that extends from a starting time point to an end time point, an amount of ignition energy at the electrode is determined during the time window and compared with an energy limit value, and an action is triggered in the event of the energy limit value being exceeded, in order to prevent further high-voltage pulses in the time window.

Abstract: In order to synchronize the at least two pulse welding processes performed simultaneously by welding devices in a multiple pulse welding process, the welding devices are connected to one another by a communication link and synchronization information is transmitted via the communication link from a transmitting welding device to at least one receiving welding device. The synchronization information is used in the receiving welding device to synchronize the pulse welding process performed by the receiving welding device with the pulse welding process performed by the transmitting welding device.

Abstract: A method for determining an interfering coupling between welding circuits (2-i) of a welding system (1) comprises the following steps: applying (S1) a predetermined current profile (SP) in a first welding circuit (2-1) of the welding system (1); detecting (S2) a voltage progression and/or current progression thus induced in a second welding circuit (2-2) of the welding system (1), and determining (S3) the interfering coupling on the basis of the current profile (SP) of the current applied in the first welding circuit (2-1) and of the voltage progression and/or current progression detected in the second welding circuit (2-2).

Abstract: Method for compensating an interfering influence on a welding current, provided by a welding power source (4) for welding a workpiece (3), from another welding power source (4?), comprising the steps of: (a) providing (SA) a compensation voltage (UKomp), which is calculated on the basis of a welding current progression provided by the other welding power source (4?); (b) subtracting (SB) the compensation voltage (UKomp) from a measured voltage (UMess), measured by a voltage measurement unit (8) of the welding power source (4), so as to determine a corrected measured voltage (U?Mess); and (c) regulating (SC) the welding current generated by the welding power source (4) as a function of the corrected measured voltage (U?Mess).

Abstract: A touch-sensitive device for use as an electronic input device for controlling by scrolling the visible portion of a document or image relative to a display. The device can include various improved configurations such as physically separate opposed input surfaces at opposite longitudinal ends and/or lateral sides. The end regions of a touch sensitive surface may be rounded and/or tapered to provide relative positional feedback to the user. Tactile positional feedback can also include surface texture changes on the scrolling area and/or changes in the surface of the frame in the region immediately adjacent the scrolling area. The touch sensitive areas may be provided within a split alphanumeric section of an ergonomic keyboard to enable scrolling without the user having to remove his or her hands from the alphanumeric section.

Abstract: A touch-sensitive device for use as an electronic input device for controlling by scrolling the visible portion of a document or image relative to a display. The device can include various improved configurations such as physically separate opposed input surfaces at opposite longitudinal ends and/or lateral sides. The end regions of a touch sensitive surface may be rounded and/or tapered to provide relative positional feedback to the user. Tactile positional feedback can also include surface texture changes on the scrolling area and/or changes in the surface of the frame in the region immediately adjacent the scrolling area. The touch sensitive areas may be provided within a split alphanumeric section of an ergonomic keyboard to enable scrolling without the user having to remove his or her hands from the alphanumeric section.

Abstract: A touch-sensitive device for use as an electronic input device for controlling by scrolling the visible portion of a document or image relative to a display. The device can include various improved configurations such as physically separate opposed input surfaces at opposite longitudinal ends and/or lateral sides. The end regions of a touch sensitive surface may be rounded and/or tapered to provide relative positional feedback to the user. Tactile positional feedback can also include surface texture changes on the scrolling area and/or changes in the surface of the frame in the region immediately adjacent the scrolling area. The touch sensitive areas may be provided within a split alphanumeric section of an ergonomic keyboard to enable scrolling without the user having to remove his or her hands from the alphanumeric section.

Abstract: A computer input device having a housing and an engagable scroll wheel. The scroll wheel is rotatable about an axis to preferably cause vertical scrolling of an image on a display. The rotatable member is laterally movable relative to the housing. A sensor is preferably positioned within the housing for sensing lateral movement of the rotatable member. In response to sensed lateral movement of the rotatable member, the image is horizontally scrolled, preferably in the direction of the lateral movement. The scrolling speed can be affected relative to the amount of displacement of the rotatable member and/or the amount of time that the rotatable member is displaced a predetermined amount. The computer input device having the rotatable member may take the form of a keyboard, a mouse, a trackbal device, or another type of computer input device.

Abstract: A computer input device having a housing and an engagable scroll wheel. The scroll wheel is rotatable about an axis to preferably cause vertical scrolling of an image on a display. The rotatable member is laterally movable relative to the housing. A sensor is preferably positioned within the housing for sensing lateral movement of the rotatable member. In response to sensed lateral movement of the rotatable member, the image is horizontally scrolled, preferably in the direction of the lateral movement. The scrolling speed can be affected relative to the amount of displacement of the rotatable member and/or the amount of time that the rotatable member is displaced a predetermined amount. The computer input device having the rotatable member may take the form of a keyboard, a mouse, a trackball device, or another type of computer input device.

Abstract: A computer input device having a housing and a finger-engagable scrolling device. A portion of the scrolling device is endlessly rotatable about a first axis to preferably cause vertical scrolling of an image on a display. The scrolling device is pivotally movable relative to the housing about a second axis perpendicular to the first axis. The first axis and the second axis may lie in a common plane or otherwise be close to one another to provide a large range of possible angular motion. A sensor is preferably positioned within the finger-engagable scrolling device for rotational movement of the rotational portion of the finger-engagable scrolling device. A pivot sensor may be provided on the second axis or laterally disposed from the scrolling device. A cover with an aperture may be provided over the scrolling device to help prevent dust and other contaminates from entering the housing through the opening for the scrolling device.

Abstract: A computer input device having a housing and a finger-engagable scrolling device. A portion of the scrolling device is endlessly rotatable about a first axis to preferably cause vertical scrolling of an image on a display. The scrolling device is pivotally movable relative to the housing about a second axis perpendicular to the first axis. The finger-engagable scrolling device may contain rotation sensor within a scroll wheel assembly. The finger-engagable scrolling device may also contain lateral arms extending laterally from the finger-engagable scrolling device.

Abstract: The invention is a scrolling apparatus may be incorporated into an input device, such as a pointing device or a keyboard, for example, and operatively connected to a host computer to scroll an image along multiple axes relative to a display screen. The scrolling apparatus includes a rotatable member with the configuration of a wheel or a ball. In addition, the scrolling apparatus includes a depressible actuator located around the rotatable member. Both the rotatable member and the actuator, which scroll the image in different scrolling directions or at different scrolling velocities, for example, may be utilized for scrolling the image.

Abstract: A computer input device having a housing and a finger-engagable scrolling device. A portion of the scrolling device is endlessly rotatable about a first axis to preferably cause vertical scrolling of an image on a display. The scrolling device is pivotally movable relative to the housing about a second axis perpendicular to the first axis. The portion of the scrolling device may further be depressed to activate a switch.

Abstract: A computer input device having a housing and a finger-engagable scrolling device. A portion of the scrolling device is endlessly rotatable about a first axis to preferably cause vertical scrolling of an image on a display. The scrolling device is pivotally movable relative to the housing about a second axis perpendicular to the first axis. The first axis and the second axis may lie in a common plane or otherwise be close to one another to provide a large range of possible angular motion. A sensor is preferably positioned within the finger-engagable scrolling device for rotational movement of the rotational portion of the finger-engagable scrolling device. A pivot sensor may be provided on the second axis or laterally disposed from the scrolling device. A cover with an aperture may be provided over the scrolling device to help prevent dust and other contaminates from entering the housing through the opening for the scrolling device.

Abstract: A scroll wheel assembly includes a rotatable member. Encoded rotation of the rotating member causes scrolling of an image on a display screen along an axis. An actuator is located within the rotational member. Pressure on different parts of the actuator causes scrolling of the image in opposing directions along a second axis. Pressure upon additional parts of the actuator can provide additional screen functions. Functions and commands caused by manipulation of the rotatable member or actuator may also be programmable.

Abstract: A touch-sensitive device for use as an electronic input device for controlling by scrolling the visible portion of a document or image relative to a display. The device can include various improved configurations such as physically separate opposed input surfaces at opposite longitudinal ends and/or lateral sides. The end regions of a touch sensitive surface may be rounded and/or tapered to provide relative positional feedback to the user. Tactile positional feedback can also include surface texture changes on the scrolling area and/or changes in the surface of the frame in the region immediately adjacent the scrolling area. The touch sensitive areas may be provided within a split alphanumeric section of an ergonomic keyboard to enable scrolling without the user having to remove his or her hands from the alphanumeric section.

Abstract: A computer input device having a housing and an engagable scroll wheel. The scroll wheel is rotatable about an axis to preferably cause vertical scrolling of an image on a display. The rotatable member is laterally movable relative to the housing. A sensor is preferably positioned within the housing for sensing lateral movement of the rotatable member. In response to sensed lateral movement of the rotatable member, the image is horizontally scrolled, preferably in the direction of the lateral movement. The scrolling speed can be affected relative to the amount of displacement of the rotatable member and/or the amount of time that the rotatable member is displaced a predetermined amount. The computer input device having the rotatable member may take the form of a keyboard, a mouse, a trackball device, or another type of computer input device.

Abstract: The invention is a scrolling apparatus may be incorporated into an input device, such as a pointing device or a keyboard, for example, and operatively connected to a host computer to scroll an image along multiple axes relative to a display screen. The scrolling apparatus includes a rotatable member with the configuration of a wheel or a ball. In addition, the scrolling apparatus includes a depressible actuator located around the rotatable member. Both the rotatable member and the actuator, which scroll the image in different scrolling directions or at different scrolling velocities, for example, may be utilized for scrolling the image.