Making changes to history-free models using direct editing

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Direct modeling is also powerful when working with

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models that have no history associated with them.

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Notice in the timeline that this part has no history and is just a base feature.

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Let's use direct modeling techniques to edit this history free model.

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We want to remove these unnecessary small ribs

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to do that.

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We'll select the faces we want removed.

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However,

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we also need to select 1/4 face to let fusion

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know how to heal the area that we are removing

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here. You can see that by removing this extra fourth face,

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this other face will grow back to the next boundary face.

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Let's repeat the same procedure. On the other side,

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direct modeling is also useful to fix minor issues with your design.

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In this example, we can see that these two faces are at a different angle

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and we want them to be the same

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by selecting one of the faces and deleting it.

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The angle of that face is now constant.

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Direct modeling can also be used to help fix modeling errors

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that were created. But unforeseen.

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For example, this step down on the back of the part may not have been intended

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in other C ad systems.

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One might have to project a profile and re extrude it.

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But that would overlap the other machining features such as the slot

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using direct modeling,

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we can just select the two faces we want removed and delete them away.

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Notice how fusion fixed the area by growing the faces and even extending the filets.

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Another design change we need to make is to

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move this screw boss down by a few millimeters

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by just drawing a selection box around the boss,

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we can freely move the faces altogether.

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However,

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if we edit the free move in the timeline,

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notice, it does not tell us how far we moved the screw boss.

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Instead

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we should use the translate option in move

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notice. Now when we edit the move feature in the timeline,

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it shows us how far we moved and even allows us to update the distance.

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So

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we recommend that you don't use the free move unless

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you don't care about capturing the distance or angle.

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Now, let's say not only do we want to move the screw boss down a little bit,

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but we also want to rotate it a few degrees

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using a crossing selection,

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we can select more faces and rotate them around a circular edge.

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Notice it is keeping the tangy correct when rotating the faces

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looking at these ribs. Here,

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it was decided that they should end more in line with the screw mounts

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because there is no sketch to modify or features to change.

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We will have to use direct modeling to accomplish this,

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select the two faces we want to move

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and then rotate them around a circular edge.

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Notice the preview shows what the result will look like

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and notice it even extends the filet if necessary.

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That's direct modeling at its best.

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Let's do the same thing on the other side.

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Unfortunately, again, due to bad modeling practices,

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we can see that this filet isn't tangential

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to this other edge. Like it should be,

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we can fix that by just deleting it

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and notice how the other faces grow to a sharp point.

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We can now measure the other face to find out what its radius is

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and use that to create a new filet

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there.

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We now fix the problematic filet with a nice new tangential filet. Like it should be.

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The last thing we need to do is to make a major change to the model.

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It was determined that only one supporting rib at the front

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of this part is not strong enough for the thin plastic ring

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using direct modeling, we can just rotate the existing rib 35 degrees.

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Instead of having to create a new sketch or machine away geometry,

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we can just use the existing geometry.

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Now, we will just mirror these faces over to the other side

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and just like that, we have fixed the problem