Acceleration/deceleration control method for a numerical control device

Abstract

An acceleration/deceleration control method for a numerical control device (CNC) which subjects a command value of a velocity in a tangential direction of a traveling path, which is instructed by a pre-interpolation feed command, to an acceleration/deceleration control. A command is read (S1), and an angle .theta. of a traveling direction of a tool with respect to an X axis is calculated (S2). Tangential accelerations .alpha.vx and .alpha.vy are derived based on preset maximum permissible accelerations for individual axes and the angle .theta. (S3). A smaller of the tangential accelerations .alpha.vx and .alpha.vy is set as a tangential acceleration .alpha.v (S4). The command velocity F is subjected to the acceleration/deceleration control by using the acceleration .alpha.v (S5), and then the interpolation is effected (S6). Since the tangential acceleration .alpha.v is set to a maximum value in a range in which the accelerations of the individual axes will not exceed the maximum permissible values thereof, the time required for effecting the acceleration/deceleration control can be reduced to a minimum value.

Dependencies are inferred from the claim text.