 Collapsible respiratory exerciser |
| The collapsible respiratory exerciser of the present invention is designed to meet the ... |
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| Portable exercise device |
| OF THE PREFERRED EMBODIMENT FIG. 1 illustrates a portable, resistive-type exercise device of the ... |
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| Exercising apparatus |
| We claim: 1. An exercising device comprising a pair of spaced fixedly interconnected end members ... |
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| Exercise tower and bench |
| The present invention includes a bench member having a pair of laterally spaced upstanding leg ... |
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| Basketball return |
| A basketball return for a basketball goal assembly including a backboard, a forwardly extending ... |
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| Exercise rowing machine |
| We claim: 1. In combination, an elongated, generally rectangular, tubular rail for an exercise ... |
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| Arrangement for converting reciprocating motion into even rotational motion |
| I claim: 1. An arrangement for converting reciprocating motion into even rotational motion, ... |
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| Video tape editor with fade control functions |
| Accordingly, it is a general object of the present invention to provide an improved video tape ... |
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| Video editing by locating segment boundaries and reordering segment sequences |
| OF THE PREFERRED EMBODIMENT Referring to FIG. 1, a typical system providing the environment for ... |
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Numerical control method
| Details |
Inventors: Matsuura, Hitoshi; Sakurai, Hiroshi;
Assignee: Fujitsu Fanuc Limited (Tokyo, JP)
Primary Examiner: Ruggiero; Joseph F.
Assistant Examiner:
Attorney, Agent or Firm: Staas & Halsey
Disclosed is a numerical control method for a numerical control (NC) system having a device to execute a mirror image function wherein the moving direction of a movable member is reversed with respect to a commanded direction for each control axis, and a memory device to store coordinate values of a commanded position and coordinate values of a current machine position. This numerical control method comprises a step of storing the respective axial coordinate values of the current machine position at the time that the mirror image function has become effective, a step of calculating the commanded position coordinate values (CP) of directly preceding NC data after the mirror image function has become effective, by using the current machine position coordinate values and the position coordinate values at the time that the mirror image function has become effective, a step of calculating an incremental value (CP.sub.n -CP) of the control axis, CP.sub.n denoting the command position coordinate value of the control axis for which the mirror image function commanded is additionally effective, a step of executing a pulse distribution calculation on the basis of the incremental value, a step of determining the moving direction of the movable member in dependence on the commanded direction and the effectiveness of the mirror image function, and a step of moving the movable member in the moving direction with distributed pulse obtained by the pulse distribution calculation. |
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DETAILED DESCRIPTION It is accordingly an object of the present invention to provide a numerical control method which requires the updating of only current machine position coordinate values and which can calculate and update commanded position coordinate values as the occasion may demand.
Another object of the present invention is to provide a numerical control method which can precisely update current machine position coordinate values and command position coordinate values even when the commanded speed is high.
Disclosed is a numerical control (NC) method for a numerical control system having a device to execute a mirror image function wherein the moving direction of a movable member is reversed with respect to a commanded direction for each control axis, and a memory device to store coordinate values of a commanded position and coordinate values of a current machine position.
This numerical control method comprises a step of storing the respective axial coordinate values of the current machine position at the time that the mirror image function has become effective, a step of calculating the commanded position coordinate values (CP) of directly preceding NC data after the mirror image function has become effective, by using the current machine position coordinate values and the position coordinate values at the time that the mirror image function has become effective, a step of calculating an incremental value (CP.
sub.
n -CP) of the control axis, CP.
sub.
n denoting the command position coordinate value of the control axis for which the mirror image function commanded is additionally effective, a step of executing a pulse distribution calculation on the basis of the incremental value, a step of determining the moving direction of the movable member in dependence on the commanded direction and the effectiveness of the mirror image function, and a step of moving the movable member in the moving direction with distributed pulses obtained by the pulse distribution calculation.
Other features and advantages of the invention will be apparent from the following description taken in connection with the accompanying drawings
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Exercise Devices 
