Linear, Start and Final Overlengths

Learn more about the interface for the Lead in/Lead out parameters, by clicking the link here.

Open Profile

Start Overlength (1)

The Start Overlength extends or shortens the first element of the profile, directly influencing the Lead in of the toolpath. If the value is negative, the profile is shortened.

For an open profile, the overlength follows the same nature as the first element:

• Linear for a segment

• Circular for an arc

Tangency with the profile is always maintained.

Final Overlength (2)

The Final Overlength extends or shortens the last element of the profile, influencing the Lead out of the toolpath. If the value is negative, the profile is shortened.

For an open profile, the overlength follows the same nature as the last element.

Tangency with the profile is always maintained.

Closed Profile

Start Overlength (1)

The Start Overlength is generated tangent to the last element of the profile, influencing the Lead in of the toolpath.

For example, if the profile starts on an arc and ends on a segment, the start overlength will be linear.

Final Overlength (2)

The Final Overlength is generated tangent to the first element of the profile, influencing the Lead out of the toolpath.

For example, if the profile starts on an arc and ends on a segment, the final overlength will be circular.

Unlike the Start and Final Overlengths, which extend or shorten the profile while maintaining tangency with its elements, the Linear Overlength modifies the toolpath strictly in a linear direction.

It can be applied at the start (Lead in) or end (Lead out) of the profile, independently of the geometry.

This parameter can also be combined with Start and Final Overlengths for more precise control of entry and exit movements.

▶️ Watch a video about Linear Overlength.