You can use the Helical Ramp Options dialog to set the default helical ramping options for Milling features.
To display the Helical Ramp Options dialog, select Helical Ramping on the Lead/Ramp page of the Machining Attributes dialog, then click Helical Options.
Select the direction for helical ramping from CW (clockwise) or CCW (counter-clockwise).
Linear approximation — Select this option to approximate arc moves with linear moves.
Linear approximation tolerance — Enter a tolerance to control the accuracy of Linear approximation relative to the theoretical helix. The lower the value, the more accurate the approximation.
Ramp diameter — Enter the diameter of the helix to use for helical ramping.