Method and apparatus for controlling increment type position control apparatus
Patent 4233491 Issued on November 11, 1980. Estimated Expiration Date: 
June 26, 1998. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
June 26, 1998. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3517286 3641849 3795853 3802622 3842331 Automatic welding apparatus Electronic position and velocity control system Patent #: 4031442 InventorsAssigneeApplicationNo. 05/919174 filed on 06/26/1978US Classes:219/125.1, With predetermined welding operation318/572, With "zero-offset" or tool radius correction318/603, Pulse-counting systems700/172, Multiple mode (e.g., rough-finish, coarse-fine)700/192, Alignment of tool or workpiece (e.g., origin or path return)700/245, Robot control700/247, Plural controlled devices or plural nonvision controlling devices901/16, Cartesian (X-Y-Z arm)901/42, Welding901/48, COUNTERBALANCE901/6, Communication with another machine901/9Closed loop (sensor feedback controls arm movement)ExaminersPrimary: Reynolds, Bruce A.Assistant: Shaw, Clifford C. Attorney, Agent or FirmInternational ClassB23K 9/12 (20060101)AbstractAn increment type position control apparatus is adapted to evaluate a numerical value concerning a positional point by making subtraction between the data in a position feedback counter for counting a feedback pulse from an incremental encoder and the data in a commanded position buffer from a processor. Upon depression of an origin return command button provided on a control panel, the position feedback counter and the commanded position buffer are each loaded with a predetermined value, whereupon a pitch is given, whereby an object being controlled is controllably moved in the direction toward the origin. If and when the object being controlled exceeds the origin position, the same is stopped and the counter and the buffer are each again loaded with an appropriate numerical value, whereupon a given pitch is provided, whereby the object being controlled is moved in the direction toward the origin and comes to a point to almost exceeding the origin position. Just at the timing when the object being controlled is about to pass the origin position, the position feedback counter is set, whereby the data concerning the origin is regained in the apparatus. | |
