Dynamic correction of servo following errors in a computer-numerically-controlled system and fixed cycle utilizing same
CA 2045600 C · Owner: Farmer, David M. · Inventors: Farmer, David M.; Gildemeister, Walter M.; Morser, Alfred H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to servo-driven computer-numerically controlled systems of the type adapted to receive part program instructions defining a desired path (110) of relative movement between a tool (12) and a workpiece (W) wherein the path may, include an interior or exterior curved portion to be effected by coordinated linear movement of machine members along at least two orthogonal linear axes (X, Y). The invention provides apparati and methods for correcting path radius errors (E) to facilitate rapid and accurate movement along the curve. The invention carries out path radius correction by generating position commands (52, 53, 54 and 55) received by the servo (69) using corrected …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed March 12, 1990 and granted February 6, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 12, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 12, 2012.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.