Why does the Ramp of the Flat strategy consist of line segments instead of circular/helical segments?

[Sadovshikov_Vitalii]

Why does the Ramp of the Flat strategy consist of line segments instead of circular/helical? Is there any logic to that?

[seth.madore]

Hmm, this does feel like an opportunity for improvement. The 3D Adaptive toolpath does a nice job of fitting arcs to the Ramp entry move. I'll open a ticket today..

[Sadovshikov_Vitalii]

The issue described above occurs when for the "Geometry" is selected a surface through the "Model" option (take a look at the "Linearized rap" setup in the file below). Another bizarre plunge behaviour with the Flat strategy happens when the option "Model" disabled (when the Flat surface is selected via "Machining Boundary Selection") and for the Ramp option selected the Helix type, but despite the option is enabled there is no the Helix Ramp generated but instead a straight down plunge movement (take a looka at the "No Ramp generated" setup)

[seth.madore]

I've opened up CAM-49800 to investigate the linearized ramp move.