Star Micronics Company Limited

Nobuyuki Endo

Shigeyuki Kurihara

Takehisa Kajiyama

Noriyuki Yazaki

Katsuhiro Shinomiya

Yukihiro Inoue

A numerical control device for a machine tool switching two reference axes comprising switching timing determining means for determining a timing for switching the moving position definition on the basis of the first reference axis and the moving position definition on the basis of the second reference axis; and reference axis switching means for switching, in response to the switching timing determining means, the moving position definition on the basis of the first reference axis and the moving position definition on the basis of the second reference axis.

Numerical control device for a machine tool

A machine tool and a control method therefor providing an improved machining accuracy even when a numerical control and electronic cam control coexist. The CPU determines the moving position of the workpiece, the tool, and the drilling tool according to the command from each channel machining sequence storage portion, and outputs the determined position as a command signal in response to the pulse signal generated at the pulse signal generating circuit. The workpiece, the tool, and the drilling tool are thereby electronic cam controlled. The CPU also determines the moving position of the workpiece and the tool according to the command from each channel machining sequence storage portion, and outputs the determined position as a command signal in response to the divided timing signal generated at the divided timing signal generating circuit. The workpiece and the tool are thereby numerically controlled.

Machine tool and control method therefor

Each time the number of cumulative rotations of a spindle rotating motor reaches the number of cumulative rotations set in a position data table T, a CPU reads out the mobile positions of a work piece and tool at thus reached number of cumulative rotations and the next number of cumulative rotations to reach from a position data storage section , and reads out a moving speed characteristic between the reached number of cumulative rotations and the next number of cumulative rotations to reach from a moving speed characteristic storage section according to an auxiliary operation designation in the position data table T. Thereafter, assuming the reached number of cumulative rotations to be a start point and the next number of cumulative is rotations to reach to be an end point, the CPU divides the part between the start and end points into predetermined timings, and defines the mobile positions of the workpiece and tool at each of the divided timings according to the read-out mobile positions of the workpiece and tool and moving speed characteristic.

Drive controller for machine tool

In cutting a high-accuracy thread, a control unit (CPU) uses a first position data calculation program to determine the moving positions of a workpiece and tool every predetermined rotational angle of a spindle rotating motor. The control unit stores the determined moving positions of the workpiece and tool in a first position data table memory, and outputs the determined moving positions as a workpiece position instruction signal and tool position instruction signal to a workpiece feed control circuit and tool feed control circuit every predetermined rotation. In cutting a low-accuracy thread, the control unit uses a second position data calculation program to determine the moving positions of the workpiece and tool every predetermined time interval. The control unit stores the determined moving positions of the workpiece and tool in a second position data table memory, and outputs the determined moving positions as a workpiece position instruction signal and tool position instruction signal to the workpiece feed control circuit and tool feed control circuit every predetermined time interval.

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Shizuoka, Japan

Nobuyuki Endo