Fanuc Corporation

Shouichi Sagara

Kentaro Fujibayashi

Toshiaki Otsuki

Hideaki Kawamura

Takao Sasaki

Tohru Mizuno

Yorikazu Fukui

Kazuhiko Sonobe

Mitsuhiro Kamijo

Yasuhiro Saito

Programs of a plurality of paths are displayed in parallel on a display screen. If a cursor of an editing target program is moved, cursors of the other programs are interlocked and moved so as to be aligned on a same row. If a sequence number that is set to any of blocks at a cursor position is a synchronization target sequence number, the movement of the cursor is stopped. If a cursor is operated further, a program of a path which does not have a block having the synchronization target sequence number at a cursor position is scrolled until a block having the synchronization target sequence number reaches a cursor position, then stops. As a result, synchronization target blocks in each path are positioned on a same row.

Numerical controller having multi-path control function

An acceleration and deceleration control in which, for a relation between speed and acceleration, the low speed part need not be symmetrical with the high speed part, is performed such that an actual acceleration curve may lie along a restricted acceleration curve as much as possible. A curve representing actual acceleration-speed, corresponding to time-speed transition to be planned, approaches a restricted acceleration curve. When supplying a movement command which has been subjected to acceleration and deceleration processing to a servo control section, acceleration in the acceleration and deceleration processing is determined such that a speed-acceleration curve of the movement command which has been subjected to acceleration and deceleration processing may lie along predetermined speed-acceleration curve. The speed-acceleration curve is set for each axis and dependent on acceleration or deceleration, using parameters.

Acceleration and deceleration control method

A controller to smoothly change speed of a machining tool to improve machining accuracy and speed of a machine. The controller includes a command analyzing section included in a block structure of software that analyzes a command program and converts it to data appropriate for use in a primary interpolation section. The primary interpolation section performs interpolation calculation in each first sampling period to obtain an interpolation point on a commanded path, and outputs the obtained interpolation point to an intermediate memory. The intermediate memory stores a motion amount for each axis, a feed rate and a block length. An acceleration/deceleration control section performs acceleration/deceleration control based on the data stored in the intermediate memory, and calculates speed in each second sampling period which is shorter than the first sampling period, to output the calculated speed to a secondary interpolation section. The secondary interpolation section defines a smooth curve expressed, for example, by a polynomial based on output from the acceleration/deceleration control section and the data in the intermediate memory, to output an interpolation point on the smooth curve in each second sampling period.

Machine controller with primary and secondary interpolation

Numerical control system

Acceleration/deceleration control method for a numerical control device

Growing community of inventors

Yamanashi, Japan

Shouichi Sagara