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As market competition becomes more fierce, production companies must survive among competitors. Product types are increasingly rich, technological innovations and product life cycles are constantly being shortened, market saturation is getting higher and higher, and product preparation time becomes longer and longer. The interruption of production due to the introduction of new processes is also increasing.
Stama Machine Tool Co., Ltd. in Schlierbach produces both vertical machining centers. Can also provide "turnkey" program. In the past, the "key-in-the-clear" program included not only the manufacturing of jigs and tools but also the provision of the entire process technology. In the future, minimizing downtime will be achieved by shortening the product life cycle and reducing production batches, while using performance-enhancing equipment. Off-road systems for machine tools can bring about a significant increase in production efficiency.
"Smart" clamping tool
Standardization is a decisive factor in preparing and importing workpieces. All standardized tools, such as face milling cutters, reaming bits and thread drills, can be retained in the machine tool magazine. It takes a relatively long time to remove additional tools from the magazine and remove unnecessary, extra tools.
A short tool engagement time will have the undesirable consequence that even a high-performance machine tool magazine cannot prepare the follower tool within a sufficiently short time. This creates extra operating time that is not related to production. Once the follow-up tool is not ready. Can not get the shortest clamping time. This requires the machine tool magazine to remove the tool in the order of program execution.
However, the method of manually sorting the tools and loading them into the magazine involves two serious weaknesses. One weakness is that the existing tool in the tool magazine needs to be moved to another position first. Another weakness is that the sister tools necessary for production cannot be correctly positioned. With the buffer station, "Stama Navigation System" can correctly sort the tools. Use the first program to arrange the corresponding storage space in the magazine, and then use the order to use the tool to complete the processing task. From the second section of the program, the tools can be sorted in the correct order. When the tool reaches its service life, the system can automatically call the corresponding sister tool to the correct position in the magazine. If different programs need to call the same tool in the magazine at the same time, the navigation system can also arrange a reasonable processing sequence to achieve the shortest fixture time. The downtime of the machine depends only on the number of tools to be mounted. In addition, the modern processing method allows the machine tool to insert the tool needed for the next process while performing the process. This "fastest" tool magazine is not based on existing NC programs. It can also hold other tools while the machine is performing the main process (Figure 1). While switching the NC program and replacing the clamping device, the machine tool can still independently deliver the required tool in the magazine. In this way, it is possible to automatically change the part family and switch the processing method without the need for a person to stand by in the shortest downtime. 
Figure 1 The tool can be mounted even when the machine is still performing the previous process:
The "fastest" magazine can hold other tools while performing the main operation
In a stable manufacturing process, the optimization of the tool operation mode is of decisive significance for increasing the production volume, reducing the delivery time and the cost of the individual pieces. In addition to reducing the failure rate of parts, the time from production interruption to system restart is an important but rarely involved step.
Dynamic navigation capable of returning to the "starting point" of the system
In the past, for the machine tool, maintainability, quick change of components and good service were equally important. In fact, the system's error correction function does not fully take into account the operation of the machine when it is turned on.
Once interference occurs between the tools, the production process must be stopped immediately, which can also have a very serious negative impact. Thread idle or undercut conditions require several feed shafts to idle at the same time. None of these can be done manually. When drilling the thread, if the drill bit is stuck in the threaded hole, the clamping washer must be released and the machine tool must be reset in the Z direction.
If the tool is stuck in the undercut, the tool cannot be removed even if it is manually operated. The operator can change several axial feeds and "squeeze" the tool from the undercut. This is, of course, an emergency method when a tool operation error occurs, but it is easy to damage the spindle of the machine tool. In many cases, the continuous damage of the spindle and the resulting downtime is the real reason for the machine to stop working.
This requires a navigation system that can reset the tool to a safe initial position. Special machine tools also have special processes and tools. Each set of NC programs must have a retract program. The machining center also needs a universally applicable dynamic navigation system whose performance depends on the type of tool and each type of feed action that will cause production interruptions. The "Stama Initial Position Program (HPP)", which has already registered patents, can meet these requirements. The programmer wants to store the tool identifier associated with the tool type in the NC program. Tool ramps are divided into different categories (eg drills, end mills, thread drills, T-slot milling cutters). The machine tool will independently navigate the tool according to the type of tool and the feed action that caused the production interruption, and make sure that the tool does not collide with the workpiece. Remove and put unnecessary tools in the magazine. Obviously, this function is effective for both stop signal and power failure. In this regard. The operator only needs to press the "HPP" button (Figure 2). In this case, idling is a fast and very important regular mode of operation. 
Figure 2 One-button reset: the operator presses the "Reset" button
The use of collision-free idling can avoid the rigorous consequences of production interruptions and the excessive extension of interruption time. However, navigation systems cannot interpret and eliminate the causes of production interruptions. Alarm and error logging of modern high-performance CNC systems allows for short-term grounding before production interruptions. However, the operator can often restart or rewrite the process with the self-diagnostic function of the existing ring memory. Sporadic errors are not recorded.
For example, the use of compressed air to clean the workpiece, the pressure changes will affect the cleaning effect. Mixing certain specific functions together can lead to functional failures and production interruptions. If the pressure of the compressed air fluctuates briefly and then becomes sufficient, the identification of the cause of the failure becomes very difficult. A similar situation occurs when the clamp pressure leaks. Oil spills during wet processing are not easily noticeable, and pressure losses can also be balanced by the hydraulic system. Unless the system treats an error as a fault signal, if the “clamped†signal is lost within a short time, it will not cause the machine to stop. This places high demands on the operator, and the fault is identified and cleared. Before, we must be able to identify the fault in advance. The eldest sister who completed the order was more and more decisive for the level of productivity. The modern navigation system can significantly reduce the non-production downtime on the machine tool, and can greatly liberate the operator.
The "Slama Event Monitoring" function can identify the true cause of a battle based on statistical preparations related to the status function in the form of a odometer. In this way, switching vibrations, poor contacts, and similar causes of shutdown can be identified and eliminated in time.
The three-level navigation system can guide the operator to find the reason for the machine down. The system has specifically created a non-erasable storage space for recording the state of the machine from the commissioning phase of the machine. It is also possible to compare the number of events recorded in an erasable memory space with the absolute number. In this way, before the current production interruption occurs, the system can analyze the incidence of incidents and failures of the company in a given time period (one day or one week). 
Figure 3 Identify and eliminate machine shut down causes in a timely manner:
Event monitoring system is mainly used for error analysis
Dynamic navigation systems can help machine operators reduce very time consuming or very difficult production tasks. Contrary to the navigation system on the car, the machine tool can independently complete the guidance instruction by means of the numerical control system. This system is not only effective for independently dividing the tools in the machine tool magazine, but also for collision-free idling. This system can avoid erroneous operations that may be very expensive under special circumstances, greatly reducing the non-productive auxiliary time, but does not impose higher requirements on the dynamic load of the machine tool.
Navigation system for machine tools
The length of time to complete an order is a decisive factor in the level of productivity. Modern navigation systems can significantly reduce non-production downtime on the machine, and can greatly liberate the operator.