Selecting Trochoidal cut turns on the ability to detect and avoid tool overload. As the tool gets towards an overload situation then FeatureCAM automatically puts in a trochoidal path to take away the overload. This happens in corners, in narrow channels, slots and the first cut of an offset toolpath which is, in effect, a narrow channel.
Because some tool overload may be acceptable, you can control Trochoidal cut with the Avoid overload (% stepover) attribute. This is the allowable overload percentage of the existing stepover. So, if you use a stepover of 10 mm and an Avoid overload (% stepover) of 10%, trochoidal moves don't start appearing until an overload condition of 10% (or 1 mm) is exceeded.
Looking in detail at a typical toolpath:
- Channel
- First cut
- Sharp corner
- Smooth link
Looking at a corner in detail you can see the trochoidal paths more easily:
