Dynamic correction of servo following errors in a computer-numer

Details Dynamic correction of servo following errors in a computer-numer Dynamic correction of servo following errors in a computer-numer

1989-03-22

1991-04-02

Smith, Jerry

Boots, shoes, and leggings

36447429, 318571, G05B 1924

Patent

active

050051350

ABSTRACT:
The invention relates to servo-driven computer-numerically-controlled systems of the type adapted to receive part program instructions defining a desired path of relative movement between a tool and a workpiece, 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. The invention provides apparati and methods for correcting path radius errors to facilitate rapid and accurate movement along the curve. In a preferred embodiment, such path radius correction is applied to a fixed cycle for machining inside circles preferably incorporating such path radius correction and providing substantially tangential engagement between the tool and a machining locus orbited by the tool to avoid abrupt accelerations or decelerations while the tool is in contact with the workpiece. In addition to avoiding surface blemishes, this facilitates machining a broader range of hole sizes with a given sized tool thereby reducing the need for frequent tool changes. The invention carries out path radius correction by generating position commands received by the servo using corrected radius data, the difference between which and the desired radius to be machined compensates for at least a portion of the path radius error that would otherwise be generated by the servo. Apparatus and methods for threading holes using a non-helical threading tools with or without path radius correction are also disclosed.

REFERENCES:
patent: 3979653 (1976-09-01), Cutler
patent: 4070608 (1978-01-01), Rosshirt et al.
patent: 4503493 (1985-03-01), Burkhardt et al.
patent: 4543625 (1985-09-01), Nozawa et al.
patent: 4616385 (1986-10-01), Wheeler
patent: 4879660 (1989-11-01), Asakura et al.

Affiliated with

Also associated with

Rating

Dynamic correction of servo following errors in a computer-numer does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Dynamic correction of servo following errors in a computer-numer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dynamic correction of servo following errors in a computer-numer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-330743