Complete roughing as shown in Figure 1.
Model file: cam\Example\basic millingoughing external boss.ppf in the EdgeCAM installation directory (remove the existing tool path, and regenerate the tool path according to the following procedure).
Note: Enter the machining mode (the process of adjusting the machining origin is omitted here).
Select the machining tool: End mill with diameter of 20mm. The milling tool with the name 20mm Slot Drill-2 flute-IC250 can be selected directly in the tool magazine.
Select the processing method: main menu → Mills → Roughing or select from the toolbar, see Figure 2.
Set the processing parameters shown in Figure 3:
Select the processing object: first select the processing control contour line, and double-click the mouse to automatically link all the contour lines (press the Tab key during dynamic capture to switch the elements within the mouse cursor), as shown in Figure 4.
After selecting the machining profile, press the right mouse button (or Enter) to confirm. Then prompt Digitise Stock Profile in the prompt area at the lower left corner of the interface, and then use the left mouse button to pick the outline of the blank. See Figure 5.
After the blank outline is selected, press the right mouse button (or Enter) to confirm. In this prompt area, “Digitise containment boundarv entities (Return for none)†is displayed. This is for you to specify a processing area. We previously specified the machining contours and the blank contours. In addition, we can also select a contour here as the range for generating machining tool paths (regardless of the Z plane in which the contour is located). Once a contour is specified, the resulting machining tool path is only defined in this contour. Within range. If you do not specify a machining range, the resulting tool path is the entire rough area. The processing range is not specified here, so you only need to confirm by pressing the right mouse button (or Enter).
The generated tool path is as follows, see Figure 6.
Note: The left mouse button double-clicks on the Roughing icon in the browser to bring up the parameter setting dialog box. Changing the parameter settings can be used to view the changes in the tool path so that the meaning of these parameters can be more clearly understood (the tool path can be more clearly seen through physical simulation. Variety).
In the parameter setting page, you need to pay attention to the setting of the following parameters.
1. The meaning of several key control planes on the Depth tab page
Level: The reference plane. The Z absolute value in the current coordinate system.
Clearance: Near the plane. The Z absolute value in the current coordinate system.
Depth: back knife, relative to the relative value of "Level", is positive above "Level" and vice versa.
Retract: Retract plane. The relative value based on the "Level" surface is "Clearance" by default.
Intermediate Slices.
Sublevel cutting is used to reduce the height of the remaining steps after rough machining. The resulting tool path is similar to roughing, but only the stepped portion is machined. Sublevel cutting allows for bottom-up cutting, see Figure 7.
%Stepover - The step size of sublevel cutting.
Cut Increment - cutting increment for sublevel cutting.
Percentage Feed - The feed rate for sublevel cutting is the percentage of normal feed.
2. Several key parameters in the General tab
Rest Rough's current processing is rough machining of the remnants. The premise of selecting this item is that there must be a roughing step before this. The system calculates and generates the tool path based on the residual material left in the previous roughing process.
Strategy - Select the form of the roughing toolpath. There are the following three options, see Figure 8.
%Stepover - step.
Offset - The margin in the X, Y, and Z directions.
Z Offset - The margin in the Z direction. If Zsetset is given separately here, its value will replace the Z direction margin set in Offset.
Tolerance - Calculate tolerances.
Lace Angle - The line cut angle (only valid when you select line cut).
Minimum Radius - The minimum radius of the corner.
Under normal circumstances, the tool can automatically judge the machining rotation angle according to the model shape, and the rotation angle smaller than the tool radius is automatically retained. Here you can also specify a larger than the tool radius of the corner as the basis for the calculation, the main role of two, one is to avoid the tool into the dead angle, resulting in sudden increase in cutting force, affecting tool life, one is selected in the cycloidal processing, to prevent The tool enters a narrow area that cannot be processed by a cycloid.
Cut by Region - Area cutting.
3. Blank selection
Specify the state of the blank. When the tool path is generated, the blank will be used to cut the tool path. In the cavity processing, you can select the "None" state.
Stock Type - blank type.
None - can only be used to machine closed cavities.
3D Model—By specifying a 3D model as a blank model, this model can be a solid model, a surface model, or an STL model. When inserting a 3D model it is recommended to place these elements in different layers for easy selection. When the blank type selected here is 3D Model, after selecting the object to be machined, there will be a step that requires specifying the surface, solid, or STL file as the blank.
Thickness - Specifies the thickness. The machined element is offset by a value as the blank outline. And use this blank to cut the tool path. The value in the following Stock Offset is the offset distance.
Note: This only works if the object being processed is a 3D solid, surface or STL formatted file. This function is wonderful for machining forgings and castings!
Bounding Box - square blank.
Profile - Specifies the profile. Select a 2D profile to describe the blank shape. If you select this item, you will be prompted to select the outline of the blank after selecting the object to be machined.
Stock Offset - Specifies the stock allowance in the 3D direction. Can be used in all blank types. However, it must be specified when Thickness is selected.
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