Web Cutting with a Planar or Cylindrical Surface

The commands used to web cut with a planar or cylindrical surface in Trelis are:

Coordinate Plane

In the command's simplest form, a coordinate plane can be used to cut the model, and can optionally be offset a positive or negative distance from its position at the origin.

To use a coordinate plane to webcut

  1. On the Command Panel, click on Geometry and then Volume.
  2. Click on the Webcut action button.
  3. Select Coordinate Plane from the drop-down menu.
  4. Enter the appropriate values for Body ID(s). This can also be done using the Pick Widget tool.
  5. Select YZ, ZX or XY.
  6. Enter in the Offset Value.
  7. Enter any other appropriate settings from this menu.
  8. Click Apply.

Webcut {Volume|Body|Group} <id_range> [With] Plane {xplane|yplane|zplane} [Offset <val>] [rotate <theta> about x|y|z <xval> <yval> <zval> [center <xval> <yval> <zval>]] webcut_options

The cutting plane can be rotated about a user-specified axis using the rotate option. The center of rotation can be moved by using the center option.

Planar Surface

An existing planar surface can also be used to cut the model; in this case, the surface is identified by its ID as the cutting tool.

To use an existing planar surface to webcut

  1. On the Command Panel, click on Geometry and then Volume.
  2. Click on the Webcut action button.
  3. Select General Plane from the drop-down menu.
  4. Enter the appropriate values for Body ID(s). This can also be done using the Pick Widget tool.
  5. Enter the appropriate settings for With Plane. By clicking the With Plane... button, another window appears to specify settings.
  6. Enter any other appropriate settings from this menu.
  7. Click Apply.

Webcut {Volume|Body|Group} <id_range> [With] Plane Surface <surface_id> webcut_options

Plane from 3 Points

Any arbitrary planar surface can be used by specifying three vertices that define the plane, and can optionally be offset a positive or negative distance from this plane.

To use a planar surface by specifying three vertices

  1. On the Command Panel, click on Geometry and then Volume.
  2. Click on the Webcut action button.
  3. Select Plane From Vertices from the drop-down menu.
  4. Enter the appropriate values for Body ID(s), Vertex 1 ID, Vertex 2 ID and Vertex 3 ID. This can also be done using the Pick Widget tool.
  5. Click Apply.

Webcut {Volume|Body|Group} <id_range> [With] Plane Vertex <vertex_1> [Vertex] <vertex_2> [Vertex] <vertex_3> [Offset <value>] webcut_options

The plane to be used for the web cut can be previewed with the preview option in the general webcut options.

Plane Normal to Curve

The next command allows a user to specify an infinite cutting plane by specifying a location on a curve. The cutting plane is created such that it is normal to the curve tangent at the specified location.

To specify the cutting plane by specifying the location on the curve

  1. On the Command Panel, click on Geometry and then Volume.
  2. Click on the Webcut action button.
  3. Select Plane From Curve from the drop-down menu.
  4. Enter the appropriate values for Body ID(s) and Curve ID. This can also be done using the Pick Widget tool.
  5. Select Fraction, Position, Distance or Near Vertex from the Position menu.
  6. Enter any other appropriate settings from this menu.
  7. Click Apply.

Webcut {Volume|Body|Group} <id_range> [With] Plane Normal To Curve <curve_id>
{Position <xval><yval><zval> | Close_To Vertex <vertex_id>} webcut_options

Webcut {Volume|Body|Group} <id_range> [With] Plane Normal To Curve <curve_id>
{Fraction <f> | Distance <d>} [[From] Vertex <vertex_id>] webcut_options

The position on the curve can be specified as:

  1. A fraction along the curve from the start of the curve, or optionally, from a specified vertex on the curve.
  2. A distance along the curve from the start of the curve, or optionally, from a specified vertex on the curve.
  3. An xyz position that is moved to the closest point on the given curve.
  4. The position of a vertex that is moved to the closest point on the given curve.

The point on the curve can be previewed with the Draw Location On Curve command and the plane to be used for the web cut can be previewed with the preview option in the general webcut options.

General Plane Specification

A webcut plane can be defined using the general plane specification options in the Specifying a Plane section of the documentation.

To webcut using general plane specification

  1. On the Command Panel, click on Geometry and then Volume.
  2. Click on the Webcut action button.
  3. Select General Plane from the drop-down menu.
  4. Enter the appropriate values for Body ID(s). This can also be done using the Pick Widget tool.
  5. Enter the appropriate settings for With Plane. Click on the With Plane... button, another window appears to specify settings.
  6. Enter any other appropriate settings from this menu.
  7. Click Apply.

Webcut {Volume|Body|Group} <id_range> [With] General Plane {options} webcut_options

Cylindrical Surface

Finally, a semi-infinite cylindrical surface can be used by specifying the cylinder radius, and the cylinder axis. The axis is specified as a line corresponding to a coordinate axis, the normal to a specified surface, two arbitrary points, or an arbitrary point and the origin. The "center" point through which the cylinder axis passes can also be specified.

To use a cylindrical surface to webcut

  1. On the Command Panel, click on Geometry and then Volume.
  2. Click on the Webcut action button.
  3. Select Cylinder from the drop-down menu.
  4. Enter the appropriate values for Body ID(s). This can also be done using the Pick Widget tool.
  5. Select Value or From Existing Arc from the Radius menu.
  6. Enter in the appropriate values for Radius or Arc ID.
  7. Select X Axis, Y Axis, Z Axis, Vector, Vertex Pair or Surface Normal from the Axis menu.Enter any other appropriate settings from this menu.
  8. Click Apply.

Webcut {Volume|Body|Group} <range> [With] Cylinder Radius <val> Axis {x|y|z|normal of surface <id>| vertex <id_1> vertex <id_2>| <x_val> <y_val> <z_val>>} [center <x_val> <y_val> <z_val>] webcut_options

Cone Surface

A semi-infinite cone surface can be used by specifying the cone outer radius, and the cone inner radius. The axis is specified as a location first of where the outer radius is applied and the second location of where the inner radius is applied.

Cone

  1. On the Command Panel, click on Geometry and then Volume.
  2. Click on the Webcut action button.
  3. Select Cone from the drop-down menu.
  4. Enter the appropriate values for Body ID(s). This can also be done using the Pick Widget tool.
  5. Enter the appropriate values for Radius 1 and Radius 2.
  6. Enter the appropriate settings for Location 1 and Location 2. Click on the Location... button, another window appears to specify settings.
  7. Enter any other appropriate settings from this menu.
  8. Click Apply.

Webcut {Volume|Body|Group} <ids> [With] cone radius <val> <val> location {options} location {options} [Imprint] [Merge] [group_results] [preview]