In this video, we'll rough and clear a part. After completing this step, you'll be able to use 3D Adaptive Clearing and use 2D Adaptive Clearing. In Fusion 360, we want to carry on with our coupler for CNC mill. We're going to begin by renaming setup 1 to be OP1, and we want to begin machining this part. We're going to start by using a 3D Adaptive Clearing which is a model-aware toolpath. We want to select the tool to use by going to our CAM DFN library and selecting tool number 5, a quarter-inch flat and aluminum roughing for our cutting data. Now that we have our tool selected, we can take a look at geometry. By default, it's going to be using stock contours and rest machining from the setup stock. These source operations for our first toolpath are going to be perfect, we don't need to make any selections of geometry. In the height section, we need to determine how far we want the tool path to go down. I'm going to use a selection, and I want to go down to this face, but I am going to add a small amount by putting a minus 0.02. The reason I'm going to do that is because I'm going to use axial stock to leave, and I want to make sure that I go down far enough that I'm going below that chamfered edge. In the passes section, we have a few options that I want to make sure that we turn on. We want to machine shallow areas and we want to machine cavities. We also want to use flat area detection and we want to modify some of the parameters, such as the maximum roughing step-down. I'm going to change this to 0.4, which automatically changes our fine step-down and our maximum step-down, I am going to change the maximum step-down to 0.03. Then we're going to modify the stock to leave values to be 0.01. The adaptive toolpaths are not generally used as finishing toolpaths. We want to make sure we understand that and we come back and finish off any additional geometry needed. We're going to say okay, and allow it to generate. The in-process stock is a little hard to see, but note that we are machining inside of that bore. Let's go ahead and let's inspect and measure the size of this to see what size tool we need to fit in there. It's got a 0.433 diameter, which means that a quarter-inch end mill will fit in there. We just need to make sure that all the settings in our toolpaths allow for that. Let's go back into our 2D adaptive and let's edit the tool path. I'm going to go into my linking perimeters and I want to take a look at the helix ramp. The helical ramp diameter right now is 0.2375 and there's a minimum ramp diameter of 0.2375. These values are going to add a good bit to our quarter-inch end mill, making it too large to fit into that pocket. What I want to do is I want to reduce the minimum value, and I'm going to go down to 0.125. This means that we're going to take our quarter-inch end mill and we're going to use a minimum ramp diameter of 0.125. We're going to say, okay, and see if we can get a little bit more material out of that center bore. Now you can see it is able to ramp into there. We can take a look at the cutting moves and we can take a look at the leads and links and see that the toolpath is dropping into that bore, machining more material away. It appears as if it's leaving a small amount of material here that could just be a remnant from the in-process stock, but that's something that we will need to take a look at before we finalize these toolpaths. Now that we've removed a good bit of material, let's go back and let's take a look at how 2D Adaptive would take a look at this operation. We're going to select 2D Adaptive using the same tool. However, this time, if we turn on stock contours and we simply say, okay, there's no geometry that's getting machine. Rest machining for a 2D operation is based on a tool diameter. It's not looking at the stock and it's not looking at the material that's already been removed. What we need to do is actually make a pocket selection. This can be an edge or this can be a face. If we select a face, you can see what geometry it's trying to calculate. When we see a preview on the screen with yellow edges, that means that this is stock. We want to make sure that we are selecting pocket geometry, and we can do this by again selecting a face, or we can select an edge. When we select an edge, however, this is going to be a containment boundary because this is a complete closed profile Fusion 360 things we're just trying to keep the tool inside. We would also need to make selections for all the internal bosses. In this case, selecting a face is going to give us a better result. However, it is avoiding the center of the part. You can see that it thinks the center is completely open and has already been machined. There are some extension options such as closest boundary and parallel. However, in our case, they're not going to make any changes to our selection. When we say okay, and we generate the tool path, Fusion 360 goes through and creates all the machining operations needed to remove material. However, this is a much less efficient approach than using something that is model aware. In the case of 2D Adaptive versus 3D Adaptive, the 3D Adaptive is a much more flexible toolpath for the case of this part, because it's able to look at the geometry that we need. At this point, I do want to make sure that I save before moving on to the next step.
