Recorders – Markers and/or driving means therefor – Stylus feature
Patent
1987-07-20
1988-12-27
Goldberg, E. A.
Recorders
Markers and/or driving means therefor
Stylus feature
346140R, 364520, G01D 1516, G06F 15626
Patent
active
047944064
ABSTRACT:
An automatic pen positioning system is operative within a graphic recording system having a plurality of recording pens moveably supported by a pen carriage. The pen carriage is moveable along a first path above a media which is moveable along a second path. A motor drive system moves a selected one of the plurality of pens into contact with the media during recording. A closed loop servo system is operative upon the pen motor drive and is controlled by a position information processor. A following error processor is coupled to the servo system and compiles a periodically sampled table of absolute position, commanded position and following error for the servo system during the initialization process in which each pen is moved toward the media at a constant velocity until it impacts the media impeading further pen motion. The following error processor determines the pen to media contact position of the engaged pen on the basis of the information derived from the servo system. Each pen is sequentially subjected to the intialization process to establish its pen to media contact position.
REFERENCES:
patent: 4567565 (1986-01-01), Haselby
AM International Corporation
Camasto Nicholas A.
Ekstrand Roy A.
Goldberg E. A.
Reinhart Mark
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