Create toolpaths to rough cut parts

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create tool paths to rough cut parts.

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After completing this video,

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you'll be able to create a basic pocket tool path

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for roughing and create an adaptive tool path for roughing

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infusion 3 60 we want to carry on with our mounting block.

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However, if you have any difficulties,

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you can upload the supply dataset mounting block with fixture dot

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file will contain the Haas VF one mill as well as our vice and part

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to begin programming. I'm gonna hide the mill and I want to zoom in on my part

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as we begin to program our parts.

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We need to think about the order of operations

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in the tool path that we're going to use.

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In most cases you'll begin with a facing operation to

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clear the material off the top of the part.

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But in this case we're going to talk about R two D adaptive and

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pocket tool paths first,

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in order to remove or rough the majority of our stock, we're going to be using the

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adaptive clearing and

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pocket tool paths.

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Typically you wouldn't use both of these tool path.

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So let's explore the differences so we can

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understand which one best fits our application.

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First, a two D.

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Pocket tool path is going to make use

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of the surrounding contour of r selected pocket.

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We need to begin by first selecting a tool in this case will go into our three

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access library and then we want to take a look at our quarter inch flat end mill.

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Typically this is a small tool that wouldn't be used for roughing.

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However we want to make sure that we take a look at how the tool path

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is formed based on our selection because we have small areas inside of our part,

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the quarter inch tool will be able to get inside of them.

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Next we need to move on to our geometry selection.

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We have two separate modes that we can use in contour mode.

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We have selected pockets and pocket recognition for selected pockets.

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We can select a face or a chain which is going to be our contour selection

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for this example, I'm going to go ahead and select the inside face.

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If we zoom in we can see that it automatically picks up on the entire border

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from here. We're going to move on to our next section which is heights.

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The heights are going to be consistent across many of

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the different tool paths because we selected the bottom pocket,

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we have our selected contour as the lowest height we're going

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to machine this is going to be exactly what we need.

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So we'll move on to our passes

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in the past this section, we need to look at a couple of things.

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The maximum step over value right now is equal to the diameter of the tool,

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which is going to be way too large for us to use on a pocketing tool path.

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We need to reduce the step over amount to

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something that's more consistent with the tool load.

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In this case,

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I'm gonna set this 2.05 for right now

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just to highlight the differences between the tool paths

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next we want to talk about different ways in which we can machine,

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we've got allow step over cusp as an available option.

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This will allow the tool to move over a considerable amount between each step.

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We also have used more spiral. This is more like an adaptive tool path.

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However it's not traditionally used in a pocketing operation.

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So for right now we're going to leave that option off.

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We also have a multiple depths option.

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This is going to determine how many steps down in the Z direction we need to take.

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I'm gonna set this 2.125 which is half of our tool diameter.

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We can also have a small finishing step down if we

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want to use this tool path to also finish the part,

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There's a stock to leave amount of .02 which is default. The two d.

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Pocket is a tool path that can be

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used both for roughing and for finishing operations.

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So I'm going to deselect stock to leave for right now.

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Then in the linking parameters we need to think about how the

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tool is going to enter and exit our cuts by default.

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It will use a helical ramp to enter the areas of our stock but we can

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determine that we want to use a pre drill location or a zigzag or ramping profile

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right now let's leave all these as the default options and say, okay,

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when we take a look at the tool path, let's go ahead and view this from the top.

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We can see that the tool path moves with a consistent

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step over based on the outside shape of our part,

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anywhere.

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We have a sharp change in geometry. For example, these filets.

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This is going to mean that we're going to get a

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larger tool load as the tool enters and exits those corners,

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let's go ahead and take a look at the same geometry. Using a two, the adaptive

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with to the adaptive clearing,

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we're going to use the same quarter inch flat end mill for our geometry.

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We're going to make the same pocket selection and for our heights,

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make sure that we are using the selected contour at the bottom

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In the past this section note that it looks slightly different from R two d. Pocket.

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In this case we need to use an optimal load,

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which is how much engagement we want for the tool.

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In this case,

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I'm gonna use .05 which was the same amount we used for our pocket operation.

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There also will be some minimum cutting radius values.

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An option to use slot clearing depending on our geometry.

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And again, we can use multiple depths and stock to leave.

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I'm gonna leave stock to leave turned on for this operation

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because this is not typically done as a finishing tool path

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for multiple depths,

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I'm going to leave this turned off and I'm going to only use a single depth of cut.

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When we take a look at the differences between the two tool paths,

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we can see that there is quite a bit of

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difference between how the tool is moving around the geometry

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with an adaptive tool path that uses a

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coil motion that allows it to maintain that consistent

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chip load as it moves through the part.

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When we take a look at the two D.

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Pocket, it's simply taking a look at the external contour,

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the shape that we selected for our pocket as it moves through the geometry,

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it's going to move over as a consistent step each time.

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This means that we will have areas such as

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these corners where we'll have a larger tool load

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and other areas where we might have a smaller tool load.

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You'll note that as it goes through the middle of the part,

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there's going to be a section where the tool

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is going to be contacting material on both sides.

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This means we're going to have a rather large tool load and

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the tool be climb and conventional cutting at the same time.

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This is not an ideal situation for surface finish or for the life of our tool.

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So keep in mind when you're picking out

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which tool paths to use for roughing operations.

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Think about the geometry that you're using the tool on as well as any

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other parameters that you might need to change to get the correct cut.

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At this point, let's make sure that we do save the design before moving on.