The Gradual Side Tilt Angle Change is an angle offset used with the Tilt Angle at Side of Cutting Direction setting. During machining, the Gradual Side Tilt Angle Change value is divided by the number of cuts into gradual side tilt angle increments. This new angle increment is added to the side tilt angle value for every new cut. The final tool axis orientation is the Tilt Angle at Side of Cutting Direction value plus the Gradual Side Tilt Angle Change value. If the side tilt angle is set to 5 degrees and the gradual side tilt angle is set to 10 degrees, then at the beginning of the toolpath the side tilt angle is 5 degrees. At the end of the toolpath the side tilt angle is 5 + 10 = 15 degrees. In the middle of the toolpath, the side tilt angle is 5 + (10 x 0.5) = 10 degrees.
Gradual Side Tilt Angle Change is a special case parameter and it isn't expected to be used widely. For example, a side tilt angle of 40 degrees could be good to machine the top of a blisk (bladed disk) and you might want to reduce it to 10 degrees. The change is applied gradually for each contour. Here collision checking is not used because sometimes you would like to have a very detailed manual control.
NOTE:
The first cut is tilted only with the Tilt Angle at Side of Cutting Direction value.
This operation only works with tool axis strategy Tilted Relative to Cutting Direction.
This option is also available as a Gradual Lead Angle Change.
You can use the Gradual Side Tilt Angle Change and Allow Flipping Side Direction. In this case, with every cut, the Tilt Angle at Side of Cutting Direction as well as the Gradual Side Tilt Angle Change alternate.
The following image shows the Gradual Side Tilt Angle changing along each pass.
