Machine Parts

  Central Drive system has a central electrical motor. Through the overhead shop the power supplied to different machine tools.   Advantages: 1.       Motor is more or less evenly loaded and its maximum capacity utilization 2.       Cost is economic. One motor of more power costs less than many motors of less capacity.   Disadvantages:   1.       If the motor is out of commission, all the machine tools remain idle. 2.       The system does not allow very long distance transmission. It creates space problem, because of line shaft and the belt drives.   Modern machine tools are driven by individual motors. In developing countries older workshop have still central drive, because of lower investment cost. All D.C. motor all time used by special conditions. Available direct current can not be used.              The Selection of a Motor as a Machine Tool Drive     Electrical Drive System     Fixtures and Economics

1.       The starting characteristics. 2.       The requirement of speed regulation. 3.       The torque and the power characteristics with respect to the shaft speed. 4.       The cost economy. 5.       The need t o breaking. 6.       The dynamic vibration such as vibration. 7.       The advantage of electrical energy. 8.       The efficiency including the operating condition. 9.       The robustness of motor.                                    Electrical Drive System     Fixtures and Economics     Whats way Walk Energy in Future?   What is Sheet cutting shearing machine, Combining shearing machine and Sheet bending machine?   Ceramic Membrane Material Synthesis and Testing Objective   China ready to land robot rover on Moon                                          Benefits of Membrance Reactor for Hydrogen Production from Biomass   Hydrogen Production Cost from Bi

  The electrical machines are used as the prime mover to achieve the operational movements of a machine tool. But the performance characteristics of the driving motor is satisfy not only the operational conditions but also the requirement of cooling the machine tools. If a clutch is set between the motor and the gear box, the motor can be started under no load condition. In its absence of high starting torque is required to overcome the resistance and the inertia. The operation movement and the kinematic linkage the driving motor may be run in two ways   a.        At a constant speed. b.       With stepped variable speed. c.        At two constant speed. d.       With infinitely variable speed.   It also can run in forward direction or reserve direction.   The working condition also influence the selection of an electric motor. These are open, protected, splash proof, dust free etc and to possibility to assemble it in a machine tool