Compound bevels are typically used for weld preparation. They involve the bevel cutting torch (flame or plasma typically) making multiple passes at different angles along an edge or edges.
The tutorials contain examples of how to create these bevels manually, see Multiple Bevel Wizard - 'Bottom Bevel + Land' and Multiple Bevel Wizard - 'K-Bevel': In these examples a number of steps are followed by the user, namely:
1.The contour which is to be compound beveled is first exploded
2.The segments making up the edges to be compound beveled are joined (if there are more than one to create a bevel edge).
3.The bevel edge is selected and the Create Bevel Geometry Wizard is invoked.
4.The user selects the bevel type: Top Bevel and Land, Bottom Bevel and Land, Double Bevel or K-Bevel, and specifies the bevel geometry.
5.The wizard creates an area layer automatically, and creates offset multiple bevel-hinted paths as required
6.The user rejoins the geometry, usually resulting in the topmost buts of the compound bevel being joined into a closed path with other usually vertical edge segments.
7.The user goes to processing, and processes the paths. The bevel hints are applied in the background so that the multiple cuts are correctly beveled
8.The user checks the sequence to ensure the cuts are order "bottom-to-top", and checks leadin placement to try to ensure the part is held in the plate by amn as-yet-uncut vertical edge when the bevels are being cut.
NOTE Primecut 4.132.638 introduced a new feature automating most of these steps, QuickPrep:
The QuickPrep button is found on the main toolbar of both the geometry and processing editors, when working on parts (It is not available when processing plates). The function works much the same in both modes, but in processing mode it gives you the option to select the bevel tool and will automatically apply the bevels, while in geometry mode it just hints the created bevel paths (more like the traditional, manual way described above).
Example 1
We will apply a K-Bevel to the top edge of this part:
Go to the Processing Editor, and select QuickPrep. Select the K-Bevel tab, and define the compound bevel geometry we require. Do not press OK or Enter yet, while the dialog is open we also need to select the edge (or range of edges) we wish to bevel. We also select the machine and bevel tool to use:
In this case we only want to bevel a single edge, but if we want to apply the compound bevel to a chain of edges, do so by selecting the first and last edges in the chain (first and last defined in the usual cutting direction context, ie clockwise for external cuts), eg:
You can reselect a selected edge to remove it from the selection.
NOTE To select the entire contour select an edge segment as the start, and next select the edge segment immediately preceding it as the finish.
In this case we only need to prep one edge segment, so we only need to select a single edgesegment, then press OK.
The QuickPrep wizard now performs its magic, creates an area layer if needed, creates the offset geometry, does the joining , applies bevel hints and applies the bevel processes, resulting in:
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Example 2
This time we will apply a 45 degree top bevel and 15 mm land to the bottom edge of the part, composed of multiple segments including the notch. To make this work we select the bottom right segment as the start and the bottom left segment as the finish. The QuickPrep wizard will assume we want to bevel everything between and including these segments:
 Select starting segment of bevel (bottom right) |
 Select finishing segment of bevel (bottom left) |
 ... Quickprep automatically adds all segments in between |
Clicking OK results in (the geometry is not ideal for 45 degree bevels, and the fillets get squared off as a result):
(looking from underneath)