Area turning parameter contains the LEAD_RADIUS option in the entry exit list but it can not be used except for the profile motion.
LEAD_RADIUS
The radius of the tangential circular movement of the tool when leading in or out. Used when creating Lead In and Lead Out Tool Motions, and in Build Cut for Profile turning. The default is 0.
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Sandvik has developed a method for a reverse turning concept (Prime Turning). See article Modern Machine Shop June 2017page 71 for complete details. Using this concept the tool must lead in using an angle approach and radius value very much like milling allows. Each roughing pass in the area turning must include this lead radius.
Creo Area Turning can be used for Prime Turning if the lead_radius option is added to each pass. Different feed rates will have to be applied to the lead_radius for this tooling and Area Turning has this option by using the APPROACH_FEED parameter.
Currently MasterCam has developed this strategy in concert with Sandvik. PTC must follow suit or be left behind by other Cad/Cam vendors.
