Electric heating – Metal heating – By arc
Patent
1993-10-06
1995-09-26
Evans, Geoffrey S.
Electric heating
Metal heating
By arc
21912162, 36447408, B23K 2600
Patent
active
054535948
ABSTRACT:
A radiation beam position and emission system coordinates the emission and position of a radiation beam to accurately move it along an intended path. This is accomplished by synchronizing a fixed clock that directs the motion of a servomechanism with a variable clock that controls beam emission from a radiation device. The synchronized clocks allow the beam to start emission when the servo moves the radiation device from which the beam exits. Sharp corners between first and second legs of a beam path are realized by turning off the beam at the site that will be the vertex of the desired corner and looping the beam emitting device along a path that reintersects the vertex at the same time the beam is restarted. This allows the impact path to continue along a trajectory away from the vertex at any desired angle. Since the beam is turned off while the servo repositions the radiation device, and is restarted only at the corner vertex, the first and second intersecting beam paths meet at a sharp corner. Such looping trajectories use this invention to ensure precise alignment of the end of the first leg and the beginning of the second, joining leg.
REFERENCES:
patent: 4914599 (1990-04-01), Seki et al.
patent: 5004889 (1991-04-01), Yamazaki et al.
patent: 5012069 (1991-04-01), Arai
Electro Scientific Industries Inc.
Evans Geoffrey S.
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