Normally, CAM system post-processors use the tool vector data to calculate the required rotary axis angle. Maintaining this relationship between the tool control point and the programmed point of the workpiece, results is a a program that requires a smaller envelope within which to operate. This means that it can be and is also used for 5-Axis machines with a Table/Table rotary axis configurations as well as machines with Head/Table rotary axis configurations. (RTCP functionality on the SIEMENS controls is called by the command TRAORI.) While most understand that RTCP automatically accounts for the length of the tool in 5-Axis machines with a Head/Head rotary axis configuration, many people do not understand that it is primarily designed to maintain the tool control point in relation to the programmed point of the workpiece. G43.5 is defined by FANUC as RTCP Type II (Rotary Tool Center Point) function. That function is activated with the G43.5 command. ![]() It may come as a surprise to many that a similar function exists within the FANUC CNC lexicon. In a previous article we discussed the SIEMENS Vector format for 5-Axis.
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