Acceleration/deceleration control apparatus for numerical control apparatus

An acceleration/deceleration control apparatus for control of a tool in a vicinity of a stroke end, comprising:

• axis control means for controlling axial movement of said tool;
• stroke end determination means for determining if said tool moves beyond the stroke end before said tool reaches the vicinity of the stroke end;
• acceleration alteration means for outputting an acceleration value in response to a determination by said stroke end determination means that said tool moves beyond the stroke end;
• means, responsive to said acceleration value and a determination by said stroke end determination means that said tool moves beyond the stroke end, for determining pulses to be distributed to said axis control means which reduce the acceleration of said tool in the vicinity of the stroke end;
• and
• interpolation means for determining first, second and third pulses, respectively supplied to first axis control means, second axis control means and third axis control means to thereby execute drive control of said tool.

An acceleration/deceleration control apparatus for control of a tool in a vicinity of a stroke end, comprising:

• preprocessing means for reading a machining block to be executed by the tool and outputting read machining block data;
• stroke end determination means for determining if the tool moves beyond the stroke end in response to the read machining block data before the tool reaches the vicinity of the stroke end;
• acceleration alteration means for outputting an acceleration value in response to a determination by said stroke end determination means that the tool moves beyond the stroke end;
• interpolation means for determining first, second and third pulses, respectively supplied to first axis control means, second axis control means and third axis control means to thereby execute drive control of the tool;
• and
• means for receiving the acceleration value from said acceleration alteration means and feed speed data from said stroke end determination means, and for outputting data to said interpolation means in response thereto.