Method for determining position within the measuring volume of a coordinate measuring machine and the like and system therefor
April 12, 2009. 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 3528481 3555254 Apparatus for making foundry cores Coordinate rotation for numerical control system Machine tool controller and part inspection monitor Coordinate measuring machine inspection and adjustment method Automatic calibration system for ultrasonic inspection Numerical control machine tool with sliding error compensation function Method of making coordinate measurements Robot control apparatus InventorsAssigneeApplicationNo. 338378 filed on 04/12/1989US Classes:702/95, Coordinate positioning33/503, Coordinate movable probe or machine33/505, Having program control or an analogue to digital device33/556, Having a movable contact probe318/632, With compensating features700/57, Alignment or registration700/193Positional compensation or modification compensation or modExaminersPrimary: Lall, Parshotam S.Assistant: Dixon, Joseph L. Attorney, Agent or FirmForeign Patent References
International ClassesG01C 025/00G06F 015/46 G05D 023/275 AbstractAxis correction or machine charateristic data is stored (108) in memory (110) within a control or measurement processor (36) of a CMM (10) (FIG. 8). The axis correction data includes error data representing 21 different geometry errors (FIG. 4A through 4C) of the CMM. As position information is required, the measurement processor captures the actual position signal from each machine axis sensor and uses this position signal to locate (112) a set of the axis correction data which describes the machine characteristics at that position. The measurement processor then mathematically combines (114) (FIG. 9) the position signal with the subset of axis correction data to obtain a corrected position signal having a corrected set of cooridinate values which describe the probe position in a true Cartesian coordinate system.Other References
Field of SearchCoordinate movable probe or machineHaving program control or an analogue to digital device Comparison with a standard Profile Member contacts successive points on the article With recording of contact member position at each point on the article Having indicator of probe position or movement Circular size Aperture type "V" type Flexible band type Having a movable contact probe Plural probes Electrical switch or transducer responsive to probe or probe is part of electrical circuit With compensating features | |
