OBRABOTKAMETALLOV Vol. 23 No. 3 2021 MATERIAL SCIENCE EQUIPMENT. INSTRUMENTS 6 4 4 Setup name Tool Setup layout Single tool external profi le turning with two feeds Sx and Sy Cutters for CNC machines, contour turning [ ] 0 0( ) ( ) 18( ) Y C y S x u y T h e E n d Ta b l e 8 A characteristic feature of two-carriage single-coordinate setups is the presence of two control parameters – the feed of each carriage. However, these parameters are not equal. The feed of the carriage on which the tool that forms the considered dimension is mounted is a direct, immediate control factor. The supply of another carriage, the tools of which form other dimensions, has only an indirect eff ect on the accuracy of the considered dimension. Table 9 shows examples of applied multi-tool setups of this class. Table 10 shows examples of possible and applicable setups of this class. Dual-carriage dual-coordinate setups. These setups can be implemented on modern dual-carriage CNC lathes. In general, machining on each carriage can be controlled by two coordinate feeds. However, even the presence of such control on only one carriage, along with a second carriage in the setup, categorizes the setups into this class. Multi-carriage setups. Setups of this class can be carried out on traditional cam-controlled machines: automatic turret lathes and automatic longitudinal profi le turning. It is possible to implement such setups on modern double-carriage CNC machines, if an additional tool spindle with an independent drive is used. Table 11 shows examples of possible and applicable setups of this class. Ta b l e 9 Examples of elementary two-carriage one-coordinate setups (the part is mounted in the chuck) The tool mounted on the transverse carriage The tool mounted on the longitudinal carriage Cutting tool for straight turning Cutting tool for chamfering Cutting tool for facing surfaces [ ] [ ] 1 1 2 2 0 0( ) ( ) 1( ) 0 1( ) ( ) 9( ) Y C y S x u y Y C y S y u y ∪ ∪ − [ ] [ ] 1 1 2 2 0 0( ) ( ) 2( ) 0 1( ) ( ) 9( ) Y C y S x u y Y C y S y u y ∪ ∪ −
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