Mitsubishi Electric Corporation

Shunro Ono

Tomonori Sato

Daisuke Fujino

Naoki Nakamura

Kotaro Nagaoka

Takeshi Tsuda

Yukihiro Iuchi

Ryuta Sato

A numerical control apparatus includes a program analyzing unit configured to pre-fetch a tool replacement command and a post-replacement positioning command from a machining program and output these commands, a tool-replacement-command output unit configured to cause, based on the tool replacement command, a machine tool to execute a tool replacing operation, and a movement-command determining unit and an interpolating unit configured to start, when the post-replacement positioning command is an axis component command for positioning an axis related to the tool replacing operation, control of the axis based on the axis component command, after waiting for completion of the tool replacing operation, and start, when the post-replacement positioning command is an axis component command for positioning an axis unrelated to the tool replacing operation, control of the axis based on the axis component command, without waiting for the same.

Numerical control apparatus

A numerical controller obtains a position of each driving shaft of a machine performing determination of a feeding speed, interpolation and coordinate conversion according to a relative instruction path and an instruction speed of a tool tip point relative to a work instructed to a processing program. When determining the feeding speed, a reference point is provided on a tool or a table, a translation speed of the reference point viewed from a mechanical coordinate system is set to an observation target speed, a reference feeding speed is obtained so that the observation target speed is a predetermined reference speed, and the smaller of the reference feeding speed and the instruction feeding speed is set to the feeding speed.

Numerical controller

A CPUreads a next block (S), and then determines whether the read block is a TCP (tool center point) control finish command 'G49' or not (S). If it is determined to be the TCP control finish command 'G49', the TCP control is finished. If it is determined not to be the TCP control finish command &#x201c;G49&#x201d;, whether the read block is a coordinate-system transformation command &#x201c;P1&#x201d; or not is determined (S). Next, if it is determined not to be the coordinate-system transformation command &#x201c;P1&#x201d;, the TCP control is performed, without transforming the coordinate system, in accordance with a command of the block (S). Next, the process returns to S, and then the process after Sis executed. If it is determined to be the coordinate-system transformation command &#x201c;P1&#x201d;, a start point (xs, ys, zs, bs, cs) and an end point (xe, ye, ze, be, ce) in a non-machine coordinate system, of the block are transformed into a start point (Xs, Ys, Zs, Bs, Cs) and an end point (Xe, Ye, Ze, Be, Ce) in a machine coordinate system, respectively (S).

Numerical control device, method of controlling the same, and system program therefor

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Tokyo, Japan

Shunro Ono