Use shaft and holder clearance

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In this lesson, we'll use shaft and holder clearance.

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After completing this lesson, you'll be able to use shaft and holder clearance to avoid collisions.

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In Fusion 360, we're going to carry on with our multi-axis contour.

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We're going to first edit the multi-axis contour and change the geometry back to this upper chain that we first started with.

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I then want to move back to my passes.

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I'm going to change the sideways tilt to 25 degrees.

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Now that we have a holder on in this case our tool,

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we want to take a look at what the simulation does for the holder as it moves around the part.

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We want to see if we have any collisions and what happens when we do have those collisions.

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I'm going to slow this down and play through.

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And as we move around, you can see that the holder itself is cutting through many different areas on the part.

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So, while the original simulation didn't show this because we didn't have a holder,

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now that we do have that holder geometry on there, it's very clear to see that this would absolutely destroy the part.

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So what we want to do now is we want to explore an option that's called shaft and holder, that's located on the tool tap.

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If we turn on shaft and holder,

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I'm going to leave the typeset to trimmed but on my Passes section, I want to make sure that I'm turned when impossible.

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We're going to allow to calculate.

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And because it's now taking a look at the shaft and holder geometry and how it collides with our part,

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we want to make sure that we understand that this is going to take quite a bit longer to calculate.

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And this is also one of those reasons why I always say when you're creating a new operation, especially when you're not comfortable with.

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Go with the default settings at first, generate an operation and once you can see what's being created,

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you’ve a better understanding of which of the settings you should modify in order to get it to perform how you would expect.

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Now that the operation is calculated,

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let's go ahead and simulate it one more time and see what happened to those collisions with the holder in the park.

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If you look at the bottom, you can see we no longer see any collisions.

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I'm going to slow this down and play through just to see what happens.

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In the areas where it would have collided, it raises the tool up and if we take a look at in this case the tool path,

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you can see that it is still going entirely around the part but in those specific instances, it was able to pull the tool away.

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So what this means is that allowing us to use that shaft and holder clearance is a good way for us to ensure that

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we don't damage the part or the machine by having contact between the holder and the part.

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Keep in mind that this is not a perfect option when we're working in these multi-axis contours,

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it's not going to be looking at the holder and shaft clearance with the fixture, it's really just looking at the actual part.

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This also means it's not looking at avoiding the stock.

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So, if there's extra stock, like we have left behind on our part down here in these areas,

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it's not going to be looking at that as a valid option for keeping the tool or the holder away.

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So it's a good idea to always remember that we need to clear those areas out, and we need to understand exactly what these options are doing.

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Once we're done adjusting these operations, let's go ahead and make sure that we save this before we move on to the next step.