Boots – shoes – and leggings
Patent
1994-06-02
1995-12-12
Envall, Jr., Roy N.
Boots, shoes, and leggings
3644743, 318573, G05B 19416, G05B 194103
Patent
active
054756022
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE PRESENT INVENTION
The present invention relates to an acceleration constant switching apparatus for switching an acceleration constant for acceleration/deceleration prior to interpolation in a computerized numerical control apparatus.
DESCRIPTION OF THE RELATED ART
Numerical control apparatuses conventionally have only one kind of an acceleration constant for acceleration/deceleration prior to interpolation. Further the acceleration constant is set to the value of the axis which must have a smallest acceleration constant among axes which may be interpolated at the same time.
For example, when an X-axis, Y-axis and Z-axis are to be interpolated, an acceleration constant of the Z-axis must be set to the smallest possible value because a spindle head is mounted thereon. Acceleration constants of the other X and Y-axes are also set equally to this small value in accordance with the acceleration constant of the Z-axis.
Therefore, even if an axis to be interpolated may have an acceleration constant which can be set to a larger value, the above small value is applied to it. As a result, a time required to accelerate and decelerate the axes is increased and a machining time is also increased accordingly.
SUMMARY OF THE PRESENT INVENTION
Taking the above into consideration, an object of the present invention is to provide an acceleration constant switching apparatus capable of selecting and switching an acceleration constant in accordance with the kind of an axis.
To attain the above object, according to the present invention, there is provided an acceleration constant switching apparatus for switching an acceleration constant for acceleration/deceleration prior to interpolation in a computerized numerical control apparatus. The acceleration constant switching apparatus comprises a commanded axis recognition unit for recognizing the kind of an axis commanded in the block of a machining program to be executed next and an acceleration constant switching unit for switching the acceleration constant for acceleration/deceleration prior to interpolation in accordance with the kind of the axis recognized by the commanded axis recognition unit.
The commanded axis recognition unit recognizes the kind of an axis designated in the block of a machining program to be executed next. The acceleration constant switching unit selects an acceleration constant for acceleration/deceleration prior to interpolation in accordance with the kind of an axis recognized by the commanded axis recognition unit and switches a previous acceleration constant to the selected acceleration constant. Therefore, an optimum acceleration constant can be applied in accordance with the kind of the axis. As a result, a time needed for the accelerating/decelerating operation of the axis can be reduced and a machining time can be also reduced accordingly.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a diagram showing an entire arrangement of an acceleration constant switching apparatus of the present invention;
FIG. 2 is a flowchart for operating the acceleration constant switching apparatus of the present invention;
FIG. 3 is a diagram showing a second embodiment of the present invention; and
FIG. 4 is a block diagram of hardware showing an entire arrangement of a computerized numerical control apparatus (CNC) to which the present invention is applied.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
An embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 is a diagram showing an entire arrangement of an acceleration constant switching apparatus, wherein a preprocess unit 1 of a computerized numerical control apparatus reads a machining program 14a and transfers movement data in the read data to an interpolation unit 5, feed speed data therein to acceleration/deceleration prior to an interpolation unit 4 and axis data therein to a commanded axis recognition unit 2, respectively.
The acceleration/deceleration prior to interpolation unit 4 subjects a feed speed to an acceleration/deceleration proces
REFERENCES:
patent: 4757457 (1988-07-01), Matsumoto
patent: 5155424 (1992-10-01), Sasaki et al.
patent: 5218281 (1993-06-01), Sasaki et al.
Kozai Haruhiko
Miyake Masahiko
Otsuki Toshiaki
Envall Jr. Roy N.
Fanuc Ltd.
Garland Steven R.
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