Use a 2D contour toolpath

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In this video, we'll use a 2D contour tool path.

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After completing this step, you'll be able to create a 2D contour tool path.

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

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We want to take a look at the geometry that still needs to be machined after our adaptive clearing tool path.

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We know that the outside bore of this has already been machine, but we need to take care of this taper, this flat face, the internal radio fillets,

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the taper this outside face and the top and the boar.

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So when we're talking about this geometry,

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we need to understand our requirements for the part and we need to understand what things can change for ease of manufacture.

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Now, oftentimes if you're the designer and you're programming the part, you can make those changes on the fly.

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But sometimes if you need a change in the part to make it easier to manufacture,

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it goes through an entire engineering change order process.

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For this part, there are a few things that would be easier for us to manufacture if they were different.

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For example, if we zoom in and we take a look at this, fill it.

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The Philip radius is going to be important based on various parameters in the tools that we're using.

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So what I want to do is navigate back to the design workspace and I'm going to find these fillets notice what I do.

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If I expand this, it's not actually giving me a fill it radius, it's giving me the generic coupler when it was converted to a body.

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If we expand some of these other groups, I don't really have any Philip values in here.

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It's not allowing me to really find that information.

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So we're going to have to treat this as if it is a part that's been imported and we don't have that history.

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If I try to activate the coupler again, you'll notice that, that information just simply isn't available.

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But what we can do is we can use tools like press poll to modify the value of these fillets, notice that the radius value is .039.

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Really, what would help us manufacture this part if it was .6-5.

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So this match is a tool that we can use generally when we're using something like a ball end or bull nose mill to finish a fill it.

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You want to use a radius value of the tool that's slightly smaller than the radius value of the Philip itself.

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However, for this example, I'm going to make the radius value exactly match an 8" ball in mill,

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because that will simplify some of the values that we're using when we're setting up the tool paths to help us understand what they mean.

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From here, let's make a quick save of the design and let's navigate back to the manufacturer workspace.

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You'll notice that there are a lot of red cautions and what we need to do is we need to regenerate all of our tool paths under actions,

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I'm going to select, generate, regenerate everything in op one and then we'll go to opt to and I'll regenerate everything here as well.

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Op two only has the single operation and the Phillips didn't affect up one at all.

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But because something changed in the model, it needs to check all those surfaces.

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So now that we've updated the model and we have a larger Philip that's going to be easier for us to work with.

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Let's talk about order of operations at this point we've done an adaptive clearing,

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we know that the outside bore of these parts are finished from the other side,

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but we need to take care of this champ er and this bottom face and work our way in.

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What I'm going to do is use a 2D contour tool path but I could also use a 2D pocket.

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Either of these options of work just fine.

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It's just simply going to depend on what your geometry is in my case, a 2D contour.

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Using a half inch flat end mill that we already have inside of our tool library is going to be a great way for me to finish this part,

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using my aluminum finishing data set.

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Next I'm going to go to geometry and I'm going to select the bottom or the root edge of that, fill it under the heights,

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it's going to be based off my selected contour and in the passes I need to make sure that I'm not leaving any stock and I can say okay.

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So now that half inch flat end mill is going to come in clean out that face in a single pass,

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because it's wider than the face and then it's going to be onto other geometry.

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The next thing that I'm gonna do is I'm going to use a 2D contour again,

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that same tool, but this time I'm going to finish off the outside bore and then I'm also going to finish off the top face.

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When I do that on the top face, I'm going to go to the inside which will likely cause an error because the tool is too large.

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Because of that error I can always go back and edit, go to my geometry and I can delete that upper contour and simply let it finish the outside edge.

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Then I need to face the top of this part.

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I can do that with a facing tool path but I can do that using a facing tool path while still keeping my half inch and milk.

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I do want to create a stock offset and I'm going to add point to the outside of the stock.

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And I'm going to say okay, allowing that tool to come back and forth, cleaning up that entire top.

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I did this from bottom to top of the model. But really it could have been done from top to bottom.

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It's just simply the order of operations where I started at the lowest point and worked my way up.

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Now that we finished those off with 2D contours, we can start to think about the rest of the geometry.

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Because I know I'm going to have to use some rounded tools, either a ball nose or a bull nose mill.

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I'm going to go ahead and finish off these upper bores while I'm here and I'm going to do that with a 2D contour as well.

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Again, it's going to be dependent upon what your requirements are,

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but we're going to do this with an eighth inch flat end mill using aluminum finishing.

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And I'm going to come in and bore this geometry out.

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So I'm going to use the geometry selection is that bottom edge.

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I'm not going to leave any stock and I'm going to use the ramp method.

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I'm going to just see what that gives me in terms of my geometry noting that it leaves a small amount of material on the inside.

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Another option that we have to clear out that geometry is we could treat it like a closed pocket.

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We could use a 2D pocket tool path selecting this inside edge, treating it as a closed pocket and we could allow it to both rough and finish.

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We're not going to leave any stock, but we do want to use multiple depths,

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using multiple depths allows us to minimize the amount of burial that the tool is going to have because it's not an adaptive motion.

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However, because we are dealing with a circular bore, it's going to be a consistent load for the majority of the cut.

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So I'm going to change the maximum roughing stepped down to be .6 which is slightly less than half of the diameter of the tool.

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I also want to make sure that I do have a finishing pass and I'm going to say okay.

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When I do that I can go back and I can get rid of my 2D contour,

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because now the pocket tool path is going in and removing that material and cleaning it up for me.

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Lastly I need to finish off this inside bore.

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Once again I could treat it like a pocket or I could come in with a 2D contour along that bottom edge,

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making sure that I'm not leaving any stock and making sure that I am ramping in and I'm going to allow it to go in and remove that material.

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One final thing I should do is I need to make sure that that 2D contour is going a little bit past the bottom.

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So I'm going to enter a negative value of -102.

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That allows it to go just past that bottom edge which has already been finished on the other side.

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Now we've finished off all of the flat or vertical faces on the part and all we're left with is the tapers and the fillets.

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So this is a great place for us to save before moving on to the next step.