Messer Griesheim Gmbh

Krauss Und Reichert

Gunter Hahn

Gunter Hellmut Schumann

Rolf Jung

Dietrich Boehme

Walter Wienen

Dietrich Bohme

A device for moving a welding torch during the welding of seams, particularly circumferential seams, includes a chassis driven by a feed motor with a feed motor control unit and includes a decelerating/accelerating device for the feed motor.

Device for moving a welding torch during the welding of seams,

An arrangement for cutting workpieces with a scanning device having a signalling photoresistor which detects markings, with an attached control device which contains a first timing element to which a switch for reducing the rate of speed is connected includes an OR-element connected between the first timing element and the switch with a further timing element connected by means of an AND-element to the input and output of the timing element with the input of the further timing element being connected to the output of the AND-element and the output of the further timing element being operationally connected to the input of the OR-element.

Photoelectric line follower

Retarding markings are provided alongside a linear pattern to be cut out by an automatic device guided by a photoelectric scanner. The markings are disposed a short distance ahead of the changes in direction of the pattern line, which is greater than the resultant decelerating path of the advance motors from the original faster advance speed to the resultant slower advance speed. A timing circuit initiates the change in advance speed after the retarding mark is detected and a second timing circuit changes the overhang of the line-scanning photocells from an initial greater magnitude to the lesser required magnitude correspond to the slower advance speed. Acceleration marks may also be provided after directional changes in the pattern to accelerate the advance speed back to the original advance speed after the changes in directions are accomplished. A third timing circuit is then provided to subsequently increase the advance speed and overhang of the photoelectric cells ahead of the axis of rotation of the scanning head back to their original magnitude.

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Hausen, Germany

Gunter Hahn