The first thing to be done on receipt of any machine tool is the initial inspection, i.e., to open the packing immediately and to check for any transport damages and shortages. Generally a packing list is enclosed, according to which all the items are checked. While unpacking, care must be taken that nothing gets lost especially with the boxes containing [...]
Careful maintenance will increase the life and efficiency of the machine. A thorough weekly cleaning is very necessary for any machine in continuous use. It plays to check and adhere to the lubricating instructions from time to time and any defect however small it is, should be immediately rectified. Otherwise this will lead to a major breakdown of the machine, [...]
The continual increase in operating speed, coupled with the demand for quiet operation, shockless motion, infinitely variable sped arrangement, and the simplified control of all types of machines, has produced problems in machine design which are in many cases best solved by incorporation of hydraulic feed or driving motion. By this arrangement, the introduction of rapid power traverse necessitating long [...]
The following main types of copying machines used in the industries. The types are: 1. Mechanical Type 2. Hydraulic System 3. Electric System. Type # 1. Mechanical Type: These work on the principle of the pantograph. Fig. 33.5 shows an arrangement of producing involute shape on grinding wheel which will be used for finishing gear teeth. An important condition for [...]
The increasing tendency in modern machine construction is to eliminate waste motion by dispensing with as much connecting mechanism as possible and instead bringing the source of power as near as possible to the machine spindle. Automatic controllers are employed which incorporate overload and under voltage protection as well as provision for securing dynamic braking (which is generally required on [...]