Gradual lead angle change
The 'Gradual lead angle change' is an angle offset onto the lead angle setting. During machining the gradual lead angle change value will be divided by the number of cuts into gradual lead angle increments. This new angle increment will be added onto the lead angle value for every new cut. So in the end the final tool axis orientation, for each cut, is the lead angle value plus increment of gradual lead angle.
For example, Number of cuts is 10, the lead angle set by user is five degrees and gradual lead angle is set to ten degrees. The value for increment of gradual lead angle is 1deg (10deg/10cuts). For the first cut, this increment value is not used. This means, at the beginning of the tool path the lead angle will be 5 degrees, at the second cut the lead angle is 6deg and at the last cut the lead angle is 14deg. between cuts, for the rapid moves a linear interpolation is used.
Notes:
-
The first cut is tilted only with the lead angle value.
-
This operation only works with tool axis strategy 'tilted relative to cutting direction'.
-
This option is also available as a gradual side tilt angle.
-
You can use together the gradual side tilt angle change and 'Allow flipping side direction'. In this case, with every ,cut the side tilt angle as well as the gradual side tilt angle change would alternate.
File Example
When you simulate the operation you see the tool tilting with the new lead angle increments. The lead angle is set to 10°, so the first cut has a 10° lead angle. The gradual lead angle change is set to 35°. With 10 cuts you get an angle increment of 3.5°. So the second cut has got a total lead angle of 13.5°, the third 17° and so on. In the end you get a total lead angle of 45°.
