Use the High speed page to control various smoothing options to avoid sharp changes in tool direction when high speed machining.
For more information on the effects of smoothing, see Tool loading.
Profile smoothing — Select to allow the arc fitting of profiles to avoid sharp changes of direction in internal corners.
If you select the Profile smoothing option, the Radius (tool diameter units) field becomes available. The radius is defined as a proportion of the tool diameter. The default value is 0.05. So, if you have a tool of diameter 10 mm (radius 5 mm) then the arc radius will be 0.5 mm.
With a Radius of 0.2:
With Profile smoothing deselected:
Note: This works in a similar way to Arc fit corners for Constant Z finishing.