Rough and clear a part

00:02

In this video, will rough and clear apart.

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After completing this step, you'll be able to use clearing.

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In fusion 360, We want to carry on with our coupler for CNC mill.

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We're going to begin by renaming. Set up one to be up one and we want to begin machining this part.

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We're going to start by using a 3D adaptive clearing which is a model aware tool path.

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We want to select the tool to use by going to our camp did from library,

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and selecting tool number five a quarter inch flat and aluminum roughing for our cutting data.

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Now that we have our tools selected, we can take a look at geometry.

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By default, It's going to be using stock contours and rest machining from the setup stock.

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These source operations for our first tool path are going to be perfect.

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We don't need to make any selections of geometry in the heights section.

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We need to determine how far we want the tool path to go down I'm going to use a selection.

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And I want to go down to this face but I am going to add a small amount by putting A-02.

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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,

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that I go down far enough that I'm going below that Chan for edge.

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In the past this section, we have a few options that I want to make sure that we turn on.

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We want a machine shallow areas and we want a machine cavities.

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We also want to use flat area detection and we want to modify some of the parameters such as the maximum roughing step down.

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I'm going to change this 2.4 which automatically changes are fine step down and our maximum step down,

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I am going to change the maximum step down 2.03.

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And then we're going to modify the stock to leave values to be .01.

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The adaptive tool paths are not generally used as finishing tool paths.

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So we want to make sure we understand that and we come back and finish off any additional geometry needed.

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We're going to say okay and allow it to generate.

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The end process stock is a little hard to see but note that we are machining inside of that bore.

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And 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.

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It's got 2.433 diameter, which means that a quarter inch end mill will fit in there.

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We just need to make sure that all the settings and our tool paths allow for that.

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So let's go back into our 2D adaptive and let's edit the tool path.

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I'm going to go into my linking parameters and I want to take a look at the helix ramp.

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The helical ramp diameter right now is .2375 and there's a minimum ramp diameter of .2375.

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These values are going to add a good bit to our quarter inch end mill, making it too large to fit into that pocket.

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So what I want to do is I want to reduce the minimum value.

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And I'm going to go down 2.125.

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This means that we're going to take our quarter in gen mill and we're going to use a minimum ramp diameter of .125.

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I'm going to say, okay, and see if we can get a little bit more material out of that center bore.

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So now you can see it is able to ramp into there so we can take a look at the cutting moves and we can take a look at the leads and links,

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and see that the tool path is dropping into that bore, machining more material away.

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It appears as if it's leaving a small amount of material here that could just be a remnant from the in process stock.

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But that's something that we will need to take a look at before we finalize these tool paths.

03:42

Now that we've removed a good bit of material, let's go back and let's take a look at how to the adaptive would take a look at this operation.

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We're going to select to the adaptive using the same tool.

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However, this time if we turn on stock contours and we simply say, okay, there's no geometry that's getting machine.

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Rest machining for a 2D Operation is based on a tool diameter.

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So it's not looking at the stock and it's not looking at the material that's already been removed.

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What we need to do is actually make a pocket selection. This can be an edge or this can be a face.

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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.

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That means that this is stock,

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we want to make sure that we are selecting pocket geometry,

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and we can do this by again selecting a face or we can select an edge.

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When we select an edge however, this is going to be a containment boundary,

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because this is a complete close profile fusion 360 things were just trying to keep the tool inside.

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We would also need to make selections for all the internal bosses.

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So in this case selecting a face is going to give us a better result.

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However, it is avoiding the center of the part.

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You can see that it thinks the center is completely open and has already been machined.

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There are some extension options such as closest boundary and parallel.

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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.

05:13

Fusion 3 60 goes through and creates all the machining operations needed to remove material.

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However, this is a much less efficient approach than using something that is model aware.

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So in the case of 2D adaptive versus 3D adaptive, the 3D adaptive is a much more flexible tool path for the case of this part,

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because it's able to look at the geometry that we need.

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At this point, I do want to make sure that I save before moving on to the next step.