Machine Tool Control for Area-Specific Service Mode Safety
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Solution Overview
Problem
Existing machine tools lack advanced operability and safety features, particularly in selecting and managing different operating modes for various machine areas, which can lead to unsafe conditions during maintenance, assembly, and service operations.
Innovation Solution
A control device that allows users to select and define operating modes for specific machine areas, incorporating a safety controller and an operating unit for authorization-based access, enabling safe operation by reducing unnecessary machine area activity and allowing for concurrent assembly and service work while ensuring safety through reduced speed and error suppression.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the machine tool operates in standard mode with full safety monitoring, then safety is ensured, but service and maintenance work cannot be performed
Solution Approach 1:
The machine tool is divided into multiple independent machine areas (first machine area, second machine area, etc.), each capable of being operated in different modes independently. This allows service work on one area without affecting safety monitoring in other areas.
Solution Approach 2:
The operating mode of each machine area is dynamically adjustable between standard mode and service mode. The control device allows operators to switch between modes based on operational requirements, enabling flexible transition between safety-critical operation and maintenance activities.
2Ease of operation
If the machine tool is switched to service mode, then maintenance work can be performed, but safety monitoring is reduced
Solution Approach 1:
Different machine areas have different operating modes assigned locally. Critical areas maintain standard mode with full safety monitoring, while non-critical areas can be in service mode. This localized differentiation allows maintenance without compromising overall safety.
Solution Approach 2:
The control device acts as an intermediary that manages the transition between standard mode and service mode. It coordinates the switching of operating modes across different machine areas, ensuring that safety requirements are met while enabling service operations.
3Productivity
If all machine areas are operated simultaneously, then productivity is high, but safety risks increase during maintenance
Solution Approach 1:
The machine tool operations are segmented into independent machine areas that can be controlled separately. This allows selective activation of only necessary machine areas during maintenance, reducing overall operational complexity and safety risks while maintaining productivity in active areas.
Solution Approach 2:
During service mode, only the necessary machine areas are activated for maintenance work, while other areas are deactivated or placed in safe states. This partial operation reduces safety risks associated with full machine operation while maintaining sufficient productivity for the specific task.
4Ease of operation
If error messages are suppressed in service mode, then maintenance work can proceed without interruptions, but safety warnings may be missed
Solution Approach 1:
Error message handling is differentiated by machine area and operating mode. In service mode, error messages are suppressed only in the specific machine area being serviced, while other areas maintain normal error reporting. This localized suppression allows maintenance continuity without compromising overall safety monitoring.
Data Source
AI summary
The invention is directed to a machine tool W having a control device for controlling the operating modes of the machine tool W. The control device comprises an operating unit B for operation of the control device by a user and a safety controller S for actuating the various machine areas M of the machine tool W. By means of the operating unit B, it is possible to select machine areas of the machine tool W and to define an operating mode for the selected machine areas M. The selected machine areas M and associated operating mode are transmitted to the safety controller S. As a result of this type of actuation of the machine tool, safe operation is possible during installation and service work on the machine tool.