SCIENCE AND TECHNOLOGY ENGLIAH FOR MECHANICAL ENGINEERING (c) The cutting tool position with respect to the workpiece is then adjusted in the next cutting pass. The process repeats until the machined dimension falls into the specified tolerance limits After that, the entire length of the surface is machined in a single pass and the dimensional accuracy can be ensured. For example, when turning a shaft on a lathe, in order to obtain the diameter d and length I with their required accuracy, several trial cutting passes are first performed on a certain length of the cylindrical surface. After each cut, the diameter is measured and the turning tool is then adjusted. When the measured diameter enters its tolerance limits. the entire length of the cylindrical surface is turned with the automatic feed. Before the tool reaches the stepped face, the continuous feed should be stopped and the trial cutting and measuring are performed until the dimension of length l enters its tolerance limitsSCIENCE AND TECHNOLOGY ENGLISH FOR MECHANICAL ENGINEERING (c) The cutting tool position with respect to the workpiece is then adjusted in the next cutting pass. The process repeats until the machined dimension falls into the specified tolerance limits. After that, the entire length of the surface is machined in a single pass and the dimensional accuracy can be ensured. For example, when turning a shaft on a lathe, in order to obtain the diameter d and length l with their required accuracy, several trial cutting passes are first performed on a certain length of the cylindrical surface. After each cut, the diameter is measured and the turning tool is then adjusted. When the measured diameter enters its tolerance limits, the entire length of the cylindrical surface is turned with the automatic feed. Before the tool reaches the stepped face, the continuous feed should be stopped, and the trial cutting and measuring are performed until the dimension of length l enters its tolerance limits