Simulate toolpaths

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In this video, will simulate toolpaths.

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After completing this step, you'll be able to, you simulate to validate toolpaths.

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

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Before we move on, we're going to simulate everything that we've done,

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and we're going to make sure that we make all the adjustments needed to these toolpaths.

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To do this, I'm first going to go in and I'm going to duplicate the 2D contour 2.

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The reason that I want to duplicate this, is because I want to focus on this operation for the larger bore first,

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and then the secondary operations because we're spending a lot of time in this helical ramp well above the part.

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So in the first operation I'm going to edit, I'm going to go to my geometry section and I want to remove these other selections.

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So by selecting them and hitting the delete option that will allow me to focus on just this single operation.

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And then in my linking parameters, I want to take a look at my leads and transitions.

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So again, we're using the ramp option and there's a ramp clearance, height value and I'm going to reduce that 2.05 to get it a little bit tighter.

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And I also want to talk about my lead in and lead out values.

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There's a linear lead in and lead out radius and distance value,

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and I'm going to reduce these down to try to get a little bit closer to be able to actually use those lead in and lead out.

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We're going to say, okay allowed to regenerate.

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I noticed that it was able to generate that without a warning.

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Lastly, I'm going to come in and edit this toolpath and modify the heights,

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because now I want the top height to be a little bit closer to where we're actually starting.

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And then that way we're not spending a bunch of time doing that helical ramp.

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So this gets us a little bit closer to where the actual top of the stock is.

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But we have to be mindful of where our retract heights are to make sure that we are coming well above the part.

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Now for the second 2D contour, I'm going to edit the geometry and I'm going to remove that larger bore.

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And that way I know that these parts are going to be a little bit closer to their actual height as well.

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So we're starting from the top of that bore and we're not wasting a bunch of time doing a helix above the part.

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Once again in the linking Parameters, I'm going to modify my ramp clearance height to be .05,

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and I'm going to modify the linear lead in values to be .02 and see if we can clear that warning because these holes are smaller.

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It's telling us that the lead out is dropped because of the linking constraints.

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So if we want to use a small lead out, we have to make it even smaller.

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So we're going to do .01 which will at least get the tool a little bit away from the edge.

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But you can see that it's still having problems with that lead out.

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The way that we could fix this is by going in with a smaller tools such as the eighth inch end mill that we're going to be using in the bore step.

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But I'm going to leave this because fusion 360 is essentially dropping that lead out because it can't handle it.

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So we're going to leave that warning as a reminder as something that we might need to go back and fix.

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Before I simulate this, let's go ahead and save it.

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And then I'm going to select both setups by simply selecting the setup folder and then we're going to go to simulate.

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I'm going to skip ahead of all the operations on the bottom side.

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Keeping in mind that they will not do any collision checking with our fixture because it wasn't included in that first set up.

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When I get to the other side, we face the part and anything that we see in green is the final size of the part.

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The next step is the adaptive which is leaving .05 on the outside.

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Then we're coming in with a spot drill for the holes.

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Were doing some pocketing operations, we're removing all the material,

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you can see that there is a small amount left on the outside so we might need to go back and change the bottom depth of that 2D contour.

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Also note that in the inside of this part we are leaving a small amount of material there as well.

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Everything else looks pretty good except for that small amount of material we left on there.

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So we're going to go back and we're going to fix that.

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Now, we have a 2D contour for the inside of this boar and we're going to modify this.

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We need to go to our heights section and the selected contour, we're going to use a negative value to go down an additional .05.

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For the outside contour which is our second to last operation. We're going to do the same thing in the heights.

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We're going to go down an additional -.05.

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Once that's been updated, let's go ahead and select the setups folder and simulate this one more time.

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This time I'm going to jump all the way to the end and I'm going to make sure that everything has been machine.

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You'll note that there is a small amount left in the bottom of this whole.

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That is something else that we will need to address and you'll notice that it looks like there's some material in here.

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These are based on tolerance values depending on the tolerance values that were used in the toolpath.

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If we modify the tolerance values inside of stock compare,

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you can see exactly what material is left behind and what's remove that wasn't supposed to be.

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You can see a small amount of red here and a small amount of blue here.

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These can be adjusted by modifying the tolerances and the toolpaths, adding additional finishing passes or smaller steps.

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But let's go ahead and take a look at that last operation that bore.

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We're going to go to its heights and instead of the whole bottom again, we'll do that -.05 allowing the tool to go all the way down.

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Once again, select the entire setup.

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We're gonna jump all the way to the end and then we're gonna take a look at the final result.

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Now everything's been cleared out on that hole.

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All the geometry has been cut. All the boards have been cut. Everything looks pretty good.

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The stock comparison is right on part.

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We can adjust the stock accuracy which is going to increase the resolution of the underlying mesh,

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and this will get us a little bit closer to a final shape.

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You can see that that does change. We've got some red in the inside of the part and we have to remember that that red is actually part of our model.

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That model is anodized red.

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So when we zoom in and zoom out, we want to make sure that we note that the red is not an issue,

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where we have gouged the material but it's an issue where we're seeing the underlying part.

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We can show the model once more.

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We can close out of this and now that I'm happy with all of these results, I want to save this one more time.

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Then I'm going to go back into my 2D contour.

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Going to go back to my linking parameters and notice that we have a horizontal lead in radius.

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I'm going to reduce this to .01.

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We have a lead in sweep angle instead of 90°. I'm going to change this to 30°. We have our linear lead out distance.

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At linear lead out distance, I'm going to change to is .01.

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Let's see if these relatively small numbers are able to get as close enough.

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So that way we don't have the warning in our toolpath so you can see they were able to get as close enough.

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We still have a small amount of lead in and lead out that happens, but we no longer have the warning.

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So now I'm happy with all these results. I'm going to go back to my part up to ISO view.

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Save it one more time and then we can move on to the next step.