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Healing (Restoring Bodies)

Femtet can import CAD data.

CAD data often contain invalid topologies and errors or redundant data.

Mesh error could happen due to such data.

By applying healing after the import, the likelihood of mesh error can be reduced.

Bodies that can be healed are sheet body and solid body.
Bodies imported from Black Box DB are not subject to healing.

There are two ways to apply healing.

1. Healing at CAD Import

If [Healing] is selected in the Setting Items for Import dialog box,

you can continue to perform healing right after the CAD data import.

A dialog box for setting healing will show up when the import begins.

As healing is applied to all bodies that can be healed on the modeling window, it may take time depending on the shape and the number of bodies.
Healing can be canceled by pressing [ESC] during the healing process.

If a shape of body is complicated, it will take time for a cancel dialog box to show up.

Healing can be undone and redone.

2. Healing on the Modeling Window

On the [Model] tab, go to and click [Restore Body] .

The dialog box to set up the healing will show up.

Body to heal can be specified if it is selected before clicking .

It may take time depending on the shape and the number of bodies.
Healing can be canceled by pressing [ESC] during the healing process.

If a shape of body is complicated, it will take time for a cancel dialog box to show up.

Healing can be undone and redone.

3. Operation Flows of Healing

4. Setting Items for Healing

Options can be set in the dialog box of healing setting.

Setting Item	Notes
Body cleaning and simplification, removal of redundant edges and topologies	Cleans the invalid data of bodies, simplifies the body form, and removes the redundant edges and topologies. It is recommended to select this option for the following cases. ・To simplify the body form after removing minute entity. ・To correct the invalid form which is found at Check Bodies. If this option is opted, the maximum length set at [Remove Minute Edge] is ignored, and the redundant edges and topologies are removed. If this setting is opted, [Restore Body Edge] cannot be selected at the same time. Some bodies might not be restored, simplified, or removed depending on the shape.
Restore Body Edge	Corrects the inaccurate edge and replaces the free curve by straight line or arc. In the default setting or when the reset button is depressed, only the option is selected. If healing does not work well with only this option, other options are recommended. If this setting is opted, [Body cleaning and simplification, removal of redundant edges and topologies] cannot be selected at the same time. Some edges and free curves might not be restored or replaced depending on the body form.
Healing	[All Bodies] ・All sheet/solid bodies that exist on the modeling window are subject to healing. [Selected Bodies] ・The bodies that are selected before displaying the dialog box for setting are subject to healing. ・The numbers shown are those of [selected bodies / all bodies]. The vertex bodies and wire bodies are ignored if they are selected. This setting item will not be displayed when called from the setting window of the CAD import.
Remove Minute Entity
Remove Spike	Removes a spike which is smaller than the specified width in the body. The spike is an entity which has a high aspect ratio (meaning narrow width) and small area. Some spike might not be removable depending on the form of the body.
Maximum Width	Specifies the value larger than the maximum width of spike. If the same value as the target is specified, it may or may not be removed depending on the dimensional tolerance. It is recommended to set the value slightly larger than the target to remove it successfully.
Remove Minute Edge	Removes the edge which is smaller than the maximum length specified in the body. If [Body cleaning and simplification, removal of redundant edges and topologies] is selected, the redundant edges and topologies are removed ignoring the maximum length set in this setting item. Some edge or topology might not be removable depending on the form of the body.
Maximum Length	Specifies the value larger than the maximum length of minute edge. If the same value as the target is specified, it may or may not be removed depending on the dimensional tolerance. It is recommended to set the value slightly larger than the target to remove it successfully.
Remove Minute Face	Removes the face smaller than the sphere with minimum radius specified in the body.
Maximum Size (Radius)	Specifies the value larger than the maximum size (radius) of minute face. If the same value as the target is specified, it may or may not be removed depending on the dimensional tolerance. By setting the value slightly larger than the target to allow it fit in the sphere, the likelihood of removing it successfully will increase. (Too large value will not remove the sphere either.) ・For instance, specify the radius (length represented by red line) to allow the minute face of hexagon.
Remove Sliver Face	Removes the sliver face smaller than the specified width in the body. The sliver face has a high aspect ratio (meaning narrow width) and small area.
Maximum Width	Specifies the value larger than the maximum width of sliver face. If the same value as the target is specified, it may or may not be removed depending on the dimensional tolerance. It is recommended to set the value slightly larger than the target to remove it successfully.
Remove Gap	Removes a gap which is smaller than the specified width and the upper limit of the aspect ratio in the body. The gap is a gash surrounded by two or more faces. It is either closed or open. ・Closed gap ・Open gap
Maximum Width	Specifies the value larger than the maximum width of gap. (w in the diagram below) If the same value as the target is specified, it may or may not be removed depending on the dimensional tolerance. It is recommended to set the value slightly larger than the target to remove it successfully.
Aspect Ratio of Gap	Specifies the upper limit of the ratio of the gap's width and length (Given by dividing w by h in the diagram above). The specifying range is between 0 and 1.
Restore	Executes the healing. This button appears when activated from the ribbon menu.
OK	Saves the healing setting. This button appears when activated from the CAD import dialog box.
Cancel	Cancels the healing setting.
Reset	Resets all of the setting items of the healing to the default values.
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