Boots – shoes – and leggings
Patent
1993-06-28
1995-12-26
Envall, Jr., Roy N.
Boots, shoes, and leggings
36447426, 364101, 364146, G06F 1546
Patent
active
054793548
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a method for the computer-assisted control of a machine or process using a process computer connected to the machine, installation, or the like via an interface, a monitor connected to the process computer for a graphic display of the machine or process cycle, and an input device, preferably in the form of a keyboard, for programming the control or predetermining set values, the control being based on a machine or process-specific flow chart.
Control methods of the kind in question have been known for years. It has been common practice to program the control of, for example, a machine by a means of a so-called CNC program language. Parametrically predetermined, operational data sets allow the operator to define, for example, a position or a path to be covered by a feed, a required acceleration of the drive motor, etc., and further parameters, such as for example a maximal liquid throughput of a metering device. A lineup of operational data sets thus allows to control the entire process or machine cycle. Other known methods operate in similar manner.
However, in practice the known control methods as described above are extremely problematic in practice. On the one hand, such controls necessitate a rigid programming. Accordingly, it is necessary to predetermine a corresponding program at the manufacturer's end, or at least at the end of a software producer. The operator of such a control can only influence the parameters. The control sequence is only variable by changing the software, or in the case of an NC control by supplementing operational data sets.
Furthermore, the control methods known so far fail to offer a predeterminable real-time behavior of the process to be controlled. Regardless of the machine or process-specific characteristic data, the control predetermines values which do not absolutely correspond with the data actually realized by the machine or in the process. For example, the known methods allow to consider nonlinearities of accelerations or any starting behavior of motors only conditionally. The operator would have to perform the programming in infinitesimally small steps, for which he would require an endless amount of operational data sets. Such a procedure is on the one hand extremely time-intensive, and on the other hand not feasible as a result of the limited storage capacity of any process computer.
In machining centers, for example when turning steel in lathe work centers, it has been practice to graphically predetermine the individual machining steps. These are exclusively desired values which do in no way consider the time behavior of the machine. The drive of the tool and/or workpiece is always based on linear acceleration values which do not correspond with reality.
A consequence of control methods known so far is the fact that for setting up a control by numerous trial machining operations, it is necessary to adapt the control to the actual process. In so doing, the adaptation to actual conditions, i.e., to the machine or process-specific data, is to be performed by the operator himself who always has to estimate same. As a result, there is always the risk of a constant excess or shortage of control. In the end, the methods of controlling a machine or process known so far, in particular in the course of their tooling or setup, are extremely expensive, inasmuch as the real-time behavior of the machine or process cannot be considered. Aside from that, the known control methods are always dependent on a predetermined program, i.e., they are inflexible in their application and can be influenced by the operator only with respect to parameters. A change in program is at most possible by changing the software, or in the case of an NC control by adding operational data sets.
It therefore the object of the present invention to provide a method of controlling a machine or a process, which allows to consider the real-time behavior of the machine or process already during the setup of the control method, and furthermore to make the method also flexible with resp
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Brown Thomas E.
Envall Jr. Roy N.
HMR GmbH
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