Abstract
A conventional manual lathe electric motor drives the multi-stage gearbox transmitting torque to the spindle so that the workpiece makes contact with the machine tool at a given speed. The cutting speed is proportional to both the diameter of the workpiece and the spindle speed, however, the increments in spindle speed are limited. Manual lathe machines cannot be regulated at the optimum cutting speeds for all diameters. An innovative modernization of the main driveline of a TSB16 manual lathe is proposed in this paper, allowing for a cost-effective system for digital control of spindle speeds using an inverter. The inverter is controlled using an 8-bit AO (analog output) converter with special software developed with Visual Basic. The results of the analysis and various test runs with this new system for automated control of spindle rotation, showed that the required cutting speed can be achieved for any workpiece diameter. The deviation of cutting-speed of the upgraded system for any turning diameter is greatly reduced in comparison with the deviation of cutting-speed of a manual lathe. Finally, tests on this versatile system demonstrated a cost-effective method for modernizing the drive system of conventional lathe machines.
Highlights
Technological advances have led to the modernization of both the control and the power train systems installed in a range of machinery
Analysis of deviation in the inverter-based power system, The index and the designation determine the location of the V-belt from left
The developed low-cost control system enabled the use of stepless speed control with the accuracy as indicated in the analysis
Summary
Technological advances have led to the modernization of both the control and the power train systems installed in a range of machinery. The drive speeds may be regulated by the system, significantly increasing the machining capacity and workable tool life. The market share for numerically controlled machine tools continues to expand. Computer numerical control (CNC) machine tools are demonstrably of higher accuracy and efficiency than. Progress in the field of electronics, information technology, and control algorithms mean that this type of machine incorporates advanced supervision and control systems
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