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Creating/modifying solids by extruding chains of curves

The Extrude function lets you extrude planar chains of curves to create one or more new solid bodies, cuts on an existing body, or bosses on an existing body. The system extrudes chains of curves by driving the shape of the curves along a linear path using a specified direction, distance, and other parameters that further define the results. The number of resulting solids, cuts, or bosses depends on the number of chains that you select, whether the chains are nested, whether you combine operations, and what construction method you use.

1. Choose Main Menu, Solids, Extrude.

2. Select one or more chains, then choose Done.

Note: Each chain that you select must be planar (flat), but all chains do not have to be in the same plane.

3. Set the extrusion direction. Mastercam displays a direction arrow on each selected chain of curves to reflect its current extrusion direction.

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Note: The default extrusion direction is normal (perpendicular) to the curves.

4. Indicate the type of extrude operation to perform:

¨ To create new solid bodies, choose Create Body.

¨ To remove material from an existing body, choose Cut Body.

¨ To add material to an existing body, choose Add Boss.

5. If you selected more than one chain (step 2) and chose either Cut Body or Add Boss (step 4), indicate whether or not to combine operations:

¨ To combine multi-chain selections into a single operation, select Combine Operations.

¨ To process each chain selection as a separate operation, clear Combine Operations.

6. Set additional parameters as needed, then choose OK. The system performs the extrude operation or prompts you to:

¨ Enter a point if you chose to extend the extruded chains to a point.

¨ Indicate the outward direction for open chains of curves if you chose the thin-wall construction method.

¨ Select a target solid if you chose to perform a cut or boss operation and there is more than one visible solid in the file.

¨ Select a face if you chose to trim a cut or boss operation to a selected face.

Note: You can create multiple solids in a single Mastercam file. However, Mastercam does not support extrude operations that would result in disjoint bodies.

Creating/modifying solids by revolving chains of curves

The Revolve function lets you revolve planar chains of curves to create one or more new solid bodies, cuts on an existing body, or bosses on an existing body. The system revolves chains of curves by driving the shape of the curves about an axis using given start and end angles and other parameters that further define the results. The number of resulting solids, cuts, or bosses depends on the number of chains that you select, whether the chains are nested, whether you combine operations, and what construction method you use.

1. Choose Main Menu, Solids, Revolve.

2. Select one or more chains, then choose Done.

Note: The set of chains that you select must be planar (flat).

3. Select a line in the graphics window to use as the rotation axis. A direction arrow displays on the selected line, and the Revolve menu displays.

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4. Change the rotation axis and/or direction as needed, then choose Done to set the axis.

5. Indicate the type of revolve operation to perform:

¨ To add material to an existing body, choose Add Boss.

¨ To create new solid bodies, choose Create Body.

¨ To remove material from an existing body, choose Cut Body.

6. If you selected more than one chain (step 2) and chose either Cut Body or Add Boss (step 5), indicate whether or not to combine operations:

¨ To combine multi-chain selections into a single operation, select Combine Operations.

¨ To process each chain selection as a separate operation, clear Combine Operations.

7. Set additional parameters as needed, then choose OK. The system performs the revolve operation or prompts you to:

¨ Indicate the outward direction for open chains of curves if you chose the thin-wall construction method.

¨ Select a target solid if you chose to perform a cut or boss operation and there is more than one visible solid in the file.

Note: You can create multiple solids in a single Mastercam file. However, Mastercam does not support revolve operations that would result in disjoint bodies.

Creating/modifying solids by sweeping chains of curves

The Sweep function lets you sweep closed, planar chains of curves, called section chains, to create one or more new solid bodies, cuts on an existing body, or bosses on an existing body. The system sweeps chains of curves by translating and rotating the shape of the curves along the entire distance of a single chain of curves, called the path chain. The angle between the section chains and the path chain is maintained throughout each resulting swept solid. The number of resulting solids, cuts, or bosses depends on the number of chains that you select, whether the chains are nested, and whether you combine operations.

1. Choose Main Menu, Solids, Sweep.

2. Select one or more closed chains of curves to sweep, then choose Done.

Note: The set of chains that you select must be planar (flat).

3. Select one curve or chain of curves for the sweep path, then choose Done.

4. Indicate the type of sweep operation to perform:

¨ To create new solid bodies, choose Create Body.

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¨ To remove material from an existing body, choose Cut Body.

¨ To add material to an existing body, choose Add Boss.

5. If you selected more than one chain (step 2) and chose either Cut Body or Add Boss (step 4), indicate whether or not to combine operations:

¨ To combine multi-chain selections into a single operation, select Combine Operations.

¨ To process each chain selection as a separate operation, clear Combine Operations.

6. Choose OK. The system performs the sweep operation or prompts you to select a target solid if you chose to perform a cut or boss operation and there is more than one visible solid in the file.

Note: You can create multiple solids in a single Mastercam file. However, Mastercam does not support sweep operations that would result in disjoint bodies.

Creating/modifying solids by lofting chains of curves

The Loft function lets you loft closed chains of curves to create a new solid body, a cut on an existing body, or a boss on an existing body. The system performs a loft operation by transitioning between two or more chains of curves in the order that you select them using either smooth or ruled (linear) blending between the chains and by capping the first and last chains with solid faces. The start point of each chain and the Sync method that you use when selecting the chains affect how the system aligns the selected chains as it transitions between them.

1. Choose Main Menu, Solids, Loft.

2. (optional) Choose Sync, select a Sync option from the Chain Synchronization Options dialog box, then choose Done.

3. Select two or more closed chains of curves.

4. Indicate the type of blend method to use:

¨ To create a smooth blend, check Create as Ruled

¨ To create a linear blend, clear Create as Ruled 5. Indicate the type of loft operation to perform:

¨ To create new solid bodies, choose Create Body.

¨ To remove material from an existing body, choose Cut Body.

¨ To add material to an existing body, choose Add Boss.

6. Choose OK to close the dialog box. The system performs the loft operation or prompts you to select a target solid if you chose to perform a cut or boss operation and there is more than one visible solid in the file.

197 Notes:

¨ You can create multiple solids in a single Mastercam file; however, Mastercam does not support loft operations that would result in disjoint bodies.

¨ For a Loft operation to succeed, the selected chains of curves must meet the following criteria:

Each individual chain of curves must be planar; however, the set of chains that you select does not have to be planar.

Each chain of curves must form a closed boundary.

All of the chains that you select must follow the same chaining direction.

You cannot select a chain of curves more than once for a given loft operation.

A selected chain of curves cannot self-intersect.

Thin-wall vs. regular method of constructing solids

When you use the Extrude or Revolve functions to generate solids from chains of curves, you have the option to create the solids using the regular or the thin-wall construction method. The most significant difference between the construction methods is how Mastercam calculates the solid. With the regular method, the system creates a sheet entity (similar to a trimmed surface) within the boundary of the curves, which must be closed, then extrudes or revolves the sheet entity into a solid. With the thin-wall

construction method, the system extrudes or revolves each entity in the chain to form sheet entities (similar to surfaces), then thickens the sheet entities to form solids.

For example, if you extrude a square into a solid using the regular construction method, the result is a cube-shaped solid, which has four vertical walls. If, however, you extrude a square using the thin-wall construction method, the result is a hollowed-out, cube-shaped solid, which has eight vertical walls (four interior and four exterior).

Note: Mastercam calculates sheet entities when creating solids. While this interim body is not an entity type that you can create or manipulate on your own, Mastercam does let you create sheet entities by stitching surfaces or by removing faces from a solid. You can then thicken sheet entities to create closed solid bodies.

The following differences further distinguish the construction methods:

¨ You can use open or closed chains of curves when creating solids with the thin-wall construction method. You can use only closed chains with the regular construction method.

¨ With the regular construction method, each non-nested chain of curves or each set of nested chains results in a separate solid, cut, or boss. With the thin-wall construction method, each chain of curves results in a separate solid, cut, or boss, regardless of whether the chains are nested.

¨ When you extrude or revolve open chains of curves using the thin-wall construction method, you must select the outward direction (to distinguish it from the inward direction) at the end of the operation so that the system knows how to apply the inward and outward thickening values.

¨ When extruding curves using the thin-wall construction method, you must use the default extrusion direction, which is normal to the first selected chain of curves. With the regular construction method, you can set the direction using any option on the Extrusion Direction menu.

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¨ When extruding open chains of curves using the thin-wall construction method, you have the option to draft the faces associated with the endpoints of open chains of curves when you apply a draft angle to the solid’s walls.

Creating/modifying solids by extruding chains of curves

The Extrude function lets you extrude planar chains of curves to create one or more new solid bodies, cuts on an existing body, or bosses on an existing body. The system extrudes chains of curves by driving the shape of the curves along a linear path using a specified direction, distance, and other parameters that further define the results. The number of resulting solids, cuts, or bosses depends on the number of chains that you select, whether the chains are nested, whether you combine operations, and what construction method you use.

1. Choose Main Menu, Solids, Extrude.

2. Select one or more chains, then choose Done.

Note: Each chain that you select must be planar (flat), but all chains do not have to be in the same plane.

3. Set the extrusion direction. Mastercam displays a direction arrow on each selected chain of curves to reflect its current extrusion direction.

Note: The default extrusion direction is normal (perpendicular) to the curves.

4. Indicate the type of extrude operation to perform:

¨ To create new solid bodies, choose Create Body.

¨ To remove material from an existing body, choose Cut Body.

¨ To add material to an existing body, choose Add Boss.

5. If you selected more than one chain (step 2) and chose either Cut Body or Add Boss (step 4), indicate whether or not to combine operations:

¨ To combine multi-chain selections into a single operation, select Combine Operations.

¨ To process each chain selection as a separate operation, clear Combine Operations.

6. Set additional parameters as needed, then choose OK. The system performs the extrude operation or prompts you to:

¨ Enter a point if you chose to extend the extruded chains to a point.

¨ Indicate the outward direction for open chains of curves if you chose the thin-wall construction method.

¨ Select a target solid if you chose to perform a cut or boss operation and there is more than one visible solid in the file.

¨ Select a face if you chose to trim a cut or boss operation to a selected face.

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Note: You can create multiple solids in a single Mastercam file. However, Mastercam does not support extrude operations that would result in disjoint bodies.

Creating/modifying solids by revolving chains of curves

The Revolve function lets you revolve planar chains of curves to create one or more new solid bodies, cuts on an existing body, or bosses on an existing body. The system revolves chains of curves by driving the shape of the curves about an axis using given start and end angles and other parameters that further define the results. The number of resulting solids, cuts, or bosses depends on the number of chains that you select, whether the chains are nested, whether you combine operations, and what construction method you use.

1. Choose Main Menu, Solids, Revolve.

2. Select one or more chains, then choose Done.

Note: The set of chains that you select must be planar (flat).

3. Select a line in the graphics window to use as the rotation axis. A direction arrow displays on the selected line, and the Revolve menu displays.

4. Change the rotation axis and/or direction as needed, then choose Done to set the axis.

5. Indicate the type of revolve operation to perform:

¨ To add material to an existing body, choose Add Boss.

¨ To create new solid bodies, choose Create Body.

¨ To remove material from an existing body, choose Cut Body.

6. If you selected more than one chain (step 2) and chose either Cut Body or Add Boss (step 5), indicate whether or not to combine operations:

¨ To combine multi-chain selections into a single operation, select Combine Operations.

¨ To process each chain selection as a separate operation, clear Combine Operations.

7. Set additional parameters as needed, then choose OK. The system performs the revolve operation or prompts you to:

¨ Indicate the outward direction for open chains of curves if you chose the thin-wall construction method.

¨ Select a target solid if you chose to perform a cut or boss operation and there is more than one visible solid in the file.

Note: You can create multiple solids in a single Mastercam file. However, Mastercam does not support revolve operations that would result in disjoint bodies.

200 Creating/modifying solids by sweeping chains of curves

The Sweep function lets you sweep closed, planar chains of curves, called section chains, to create one or more new solid bodies, cuts on an existing body, or bosses on an existing body. The system sweeps chains of curves by translating and rotating the shape of the curves along the entire distance of a single chain of curves, called the path chain. The angle between the section chains and the path chain is maintained throughout each resulting swept solid. The number of resulting solids, cuts, or bosses depends on the number of chains that you select, whether the chains are nested, and whether you combine operations.

1. Choose Main Menu, Solids, Sweep.

2. Select one or more closed chains of curves to sweep, then choose Done.

Note: The set of chains that you select must be planar (flat).

3. Select one curve or chain of curves for the sweep path, then choose Done.

4. Indicate the type of sweep operation to perform:

¨ To create new solid bodies, choose Create Body.

¨ To remove material from an existing body, choose Cut Body.

¨ To add material to an existing body, choose Add Boss.

5. If you selected more than one chain (step 2) and chose either Cut Body or Add Boss (step 4), indicate whether or not to combine operations:

¨ To combine multi-chain selections into a single operation, select Combine Operations.

¨ To process each chain selection as a separate operation, clear Combine Operations.

6. Choose OK. The system performs the sweep operation or prompts you to select a target solid if you chose to perform a cut or boss operation and there is more than one visible solid in the file.

Note: You can create multiple solids in a single Mastercam file. However, Mastercam does not support sweep operations that would result in disjoint bodies.

Creating/modifying solids by lofting chains of curves

The Loft function lets you loft closed chains of curves to create a new solid body, a cut on an existing body, or a boss on an existing body. The system performs a loft operation by transitioning between two or more chains of curves in the order that you select them using either smooth or ruled (linear) blending between the chains and by capping the first and last chains with solid faces. The start point of each chain and the Sync method that you use when selecting the chains affect how the system aligns the selected chains as it transitions between them.

1. Choose Main Menu, Solids, Loft.

2. (optional) Choose Sync, select a Sync option from the Chain Synchronization Options dialog box, then choose Done.

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