REAL TIME CONTROL OF CUTTER ORIENTATION FOR MACHINING SURFACE-CURVE WITH MULTI-AXIS CNC MACHINE-TOOL

2001 ◽  
Vol 37 (03) ◽  
pp. 85 ◽  
Author(s):  
Jianxin Jin
Keyword(s):  
Machine Tool ◽  
Real Time ◽  
Cnc Machine Tool ◽  
Cnc Machine ◽  
Real Time Control ◽  
Time Control ◽  
Cutter Orientation ◽  
Surface Curve

Design and Implementation of an Embedded PLC System with Applied-Information Technology

2014 ◽  
Vol 685 ◽  
pp. 401-404
Author(s):  
Xiao Juan Shi
Keyword(s):  
Machine Tool ◽  
Integrated Design ◽  
Ladder Diagram ◽  
Cnc Machine Tool ◽  
Single Chip ◽  
Cnc Machine ◽  
Real Time Control ◽  
Design Environment ◽  
Compact Structure ◽  
Time Control

To overcome the shortcomings of external PLC (Programmable Logic Controller) and soft PLC being widely employed in switch control of CNC machine tool, an embedded PLC system was developed by integrating AVR single chip ATMEGA169, PC bus technique and dual port RAM. Both hardware circuit and software of the PLC system were designed and implemented. The software of Industrial PC was developed by using ladder-diagram IDE (Integrated Design Environment) based on the platform of Borland C++ Builder. In this environment, it can fulfill edit, compilation and communication function of ladder-diagram file. It also can monitor and diagnose PLC running status. This developed embedded PLC system has the characteristics of compact structure, high communication and reliability. It can effectively satisfy real-time control requirements of CNC machine tool.

Toward a Real Time Control of Toolpath in Milling Processes

2013 ◽  
Vol 554-557 ◽  
pp. 706-713 ◽  
Author(s):  
Fabien Poulhaon ◽  
Matthieu Rauch ◽  
Adrien Leygue ◽  
Jean Yves Hascoet ◽  
Francisco Chinesta
Keyword(s):  
Real Time ◽  
Constant Thickness ◽  
Efficient Production ◽  
Cnc Machine ◽  
Real Time Control ◽  
Time Control ◽  
Online Measurements ◽  
Bilateral Approach ◽  
On Line ◽  
Cnc Controller

Real-time control of manufacturing processes is a challenging issue for nowadays industry. The need for ever more efficient production requires new strategies in order to make correct decisions in an acceptable time. In a large number of cases, operators working on a CNC machine tool have a reduced number of possibilities for interacting in real-time with the machine. Numerical simulation based control is in that sense an appealing alternative to the conventional approach since it provides the operator with an additional source of information, confirming his choices or in reverse suggesting a more adapted strategy. The main goal of this work is to propose a method to move from a bilateral approach (operator and CNC controller) to a trilateral one where the simulation is an active component of the manufacturing process. This paper focuses on a simple issue sometimes encountered in milling processes: how to remove a constant thickness of material at the surface of a part whose exact geometry is unknown? The difficulty lies in the choice of an appropriate trajectory for the tool. So far the method which is employed consists in acquiring the geometry of the part thanks to a palpation step made prior to milling. However, this step has to be repeated for each part and can become rather fastidious as the size of the part increases. The approach presented here gets rid of the palpation step and makes use of online measurements for identifying the real geometry and correcting the trajectory of the tool in accordance. By monitoring the forces applying on the tool (directly on the NC), we have access to the milling depth and therefore to the geometry of the part at several locations along the trajectory of the tool. This information is used as an input data for our numerical model running on an external device, which finally derives an approximation for the geometry. An optimized trajectory is then obtained and is updated on the machine. This procedure is repeated as the tool moves forward and it allows for a fast and robust on-line correction of the toolpath.

Monitoring and Control System Design for Tool Wear Condition of CNC Machine Based on Artificial Neural Networks

2014 ◽  
Vol 556-562 ◽  
pp. 3251-3254 ◽  
Author(s):  
Dan Su
Keyword(s):  
Machine Tool ◽  
Real Time ◽  
Cnc Machine Tool ◽  
Monitoring And Control ◽  
Cnc Machine ◽  
Monitoring And Control System ◽  
High Measurement ◽  
Software Modules ◽  
Equipment Wear ◽  
And Control

Spindle wear of CNC machine affects the working efficiency of the machine. To solve this problem, the reasons for the generation of CNC machine tool equipment wear is analyzed, the system's hardware modules and software modules are designed and implemented in accordance with the system requirements. Parameters such as input and output power, spindle speed of CNC machine tool equipment are acquired by the sensor circuit. After a comprehensive analysis of the data, system software combined with neural network model displays the test results on the LCD screen, real-time output of CNC machine tool equipment operating status and the spindle wear. Thus the operation of CNC machine is ensured and equipment failure is avoided. Through the system test, indicating that the proposed system can real-time output the monitor results of spindle wear of CNC machine tool equipment, and has high measurement accuracy for the main parameters such as power and efficiency of the equipment.

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