Fixing Fusion 360 CAM Toolpaths: 2D Adaptive and 3D Contour! FF56

hi folks let's take a look at how to fix this 2d adaptive why does it have these why is it missing this area right here what's wrong what do we need to change and let's take a look at how to machine this radius of this edge in this part welcome to the fusion Friday I think this is a great example this customer sent this in they said why I don't want it to be avoiding this geometry that's a feature that's happening on the surface below and I want to use an adaptive to rough out this big slot and they're absolutely right the adaptive is the right strategy to use so why are they getting this well there's three different tool paths we can get here this one they sent us this one which is what I would call correct and this one where you're totally avoiding these holes let's take a look at how to get these I'm going to fix theirs right now or to rather take a look right click Edit the second tab here geometry I can see so a whole bunch of stuff selected so I usually say just X this right here and just start over just easier in this example so click that this is a way a big no-no that we will see people often to which is they'll click the face and I would admit there's no reason why you what you should know that's a bad idea I'm telling you though don't click faces as a general rule for 2d ops because when I click that that's when it gives me this wonky tool path it is you know sign of a kind of looking at those holes at the level below the right thing to do go back and edit it click geometry delete that is to use 2d contours in the 2d strategies so in other words I'm going to click on this line here take a look what it does it selects everything from here on over all the way to the end of the part so see it's all the way extending back to the edge which is what we want because I want it limited to the slot so all I need to do now is come up here and pick this edge clicks it like so and now it's limited my blue or purple or whatever you want to call that color to the slot and if I click OK boom I get the toolpath I want every once in a while you'll see it flips an arrow to the wrong side so let's say we click it here and I'll click that now to flip it intentionally and you know sometimes usually with open pockets or open contours it may get confused and in that case you just click on the red arrow and it flips it back over to the right side you can see there big no-no see how I only selected the one edge it's ignoring the fact that there's geometry over here which is a great segue to explain the difference between the 2d menu here and all of these options and the 3d menu it's a little bit of a misnomer because fun fun fact there's operations like trace within the 2d that actually cut in three dimensions and likewise there's operations in the 3d like horizontal that actually only cut 2d or two axes at the same time so what's up with why are these things named that way so the reason is that the 2d is a dumb strategy it relies on the user to tell it where to do work why is it a good thing it's a good thing because it lets you drive the tool path it lets you kind of say okay here's the zone I want you to do work in in this case I contain it over here and I say over here and that's what creates just you're building up the tool path in other words there is no option if I click no nothing and just click OK it says hey I don't know what's it's a machine you need to tell me where to do work by the way they'll want to avoid those the correct way would be to click here and here click ok first I'm a big fan of building a tool path up taking baby steps so I want to avoid let's say those had already been drilled out it was a waste of time let's go around them edit geometry click here click here click okay boom now it's avoiding those if you're thinking waving here no John it's avoiding them too far no that's this control the blue represents the control point of the tool that's where the tool is being driven which is the center of the tool so if we take a look at a simulation and I click on one of these you can see it is kissing the edge that tool tangentially to the area we told it to ignore if you guys learn something there I know that some subtle differences there that really help but the biggest takeaway I think is to understand that 2d you're building up a tool path so let's take a look at this 3d part the customer actually did a great job and they they support our channel on patreon and they said John having a hell of a time with this radius and it's a really funny radius and in fact I hit the I key and I couldn't measure it and I don't remember did this work yeah so that just gives me a length and I'm like oh that's not what I want I don't want a length I want the radius so let me show you how I measured it cut back in the model and if there's a better way by all means let me know sketch project project and it's going to say what plane do you want to project it on to I don't really care here I just picked this front plane here so that's going to orient to me normal to what do I want to project well I want to project this so when I click that see how I get an arc so what is that arc it's the representation of that curve that in that cool now I can hit D for dimension click on it and I get point Oh 98 which i think is point 196 that might actually be a metric like dimension equivalent I don't really remember the top my head but it doesn't matter because even if it was a metric I don't have or stock metric ball end mil so I've got to use a fractional end mil to interpolate this so let's figure out how we do that I think the best way is going to be a 3d to her I was also playing with pencil which we can take a look at here in a minute 3d contour though if you read the pop-up-menu is the best strategy for finishing steep walls cool works for me so the three sixteenths ball end mil that came up by default is actually perfect because if that was about a point one nine six diameter then we're using a point one eight seven five tool we're very close which is going to minimize the scalloping or means we have to take fewer passes to get a good clean cut so here's the cool thing remember how I just said 2d toolpaths build up based on what you input 3d topaz are the exact opposite you could you tear them down you can strain them and limit them what do I mean by that I did watch I haven't clicked anything other than to create the 3d contour and to pick the tool click OK take a look now I'm sure some of you pros out there saying Oh John that's ridiculous you'd never do that it takes forever to compute blah blah blah look it is far easier to start with a successful tool path with something that shows the blue lines and narrow it in and dial it in than it is to get that stupid yellow or red exclamation point when you don't know what you did why and wrong let's edit let's narrow this thing in right click Edit geometry machining boundary this is where a lot of the Mojo happens I'm going to choose selection and I'm just going to click right here for now I pick this line and you'll notice tool Center on boundary let's see what happens okay so good news is we've definitely limited our toolpath bad news is it's all happening both along this edge where I want others radius but also all this area inside the center of the model we don't want that so let's quickly see if we can get rid of that right click Edit geometry we can click another chain right here confusion is going to no and there's no individual indicator here but it's going to know you want to do work between these two areas so click okay now take a look at our past fusion Friday's if you want to understand more on Tools containment option here tool Center or you can just look at this pop up graph which is quite helpful as well very helpful here you can see what's happening is we're starting down at the bottom and we're working our way up so let's see if this is actually what we want I'm going to switch first of all actually see how it's plunging in with the red I don't want to do that because by this point by the time I got here machine is part this all material would be gone so I don't want to do that helical ramp so edit linking plunge right here the ramp type plunge click okay cool cleans up my tool path a little too which is going to help here for what you're about to see I want to switch my model over down here with this little monitor visual style wireframe so now we've got a wireframe view of our part hop into simulation and I'm going to hover my mouse along this bottom edge here until I get a white dot okay so there was the first one make sure I'm not not on the green one here but rather on the white one okay right there so what that is is the first you know sort of node or end point from a g-code standpoint that I can pick on I kind of wish I could pick on any putt point along the blue but you can't you can only pick on points where the tool I think it's as far as going to issue some sort of a G code change so this is all one straight line that's what I want to pick up I want to pick up where this tool starts in a straight line right there and now I can hit the front button zoom in and you can see what I was talking about this is a Waze here 0.1875 tool and this is a point one nine six diameter basically we're cutting pretty darn well until about halfway up when the radius starts to open up a little bit more than our tool so we will need to come back up but if you take a look the way this way this model would run right now is your next Pat tool path up would be about here I think click on the front look it looked like it was going to be good but it isn't the point where we're touching is all the way up here so this sliver of material through here isn't actually getting cut away which is kind of a bummer so first way I would think to fix that would be edit our tool path passes and just increase the step-down say from 40,000 s now to point zero five okay awesome sort of the good news is we've got a bunch more tool path line so this probably is going to cut our part but if I take a look you know pretty quickly even already there I'm on like the third line up I'm getting to the point where I'm past what I need to do work in yo down here was good down here was good I'm not clicking an exact right point but you get the idea and the bottom one was good but look at that this is ridiculous why do I need to spend all this time cutting up here so again I've mentioned this like three or four straight weeks in a row but a card to rob Locke was video where I learned this next trick right click Edit geometry contact point boundary probably the most settings I've ever seen in cam software in my experience watch what's going to happen click check that click ok it's going to analyze where it needs to put code and nowhere else to get rid of the material look it's got rid of all those wasted air passes notice we didn't change any of our machining boundary and we didn't change our toolkit path containment we just said hey only do work where it's contacting this radius right here and it's pretty darn amazing take a look the first one is the bottom guy right here so that's kind of like our other first one where we're getting most of the work done until about halfway up and it starts to open up that area but the second one I can click on here the second guy look it basically takes the other half of that out so I probably some way you could do some math to figure out what scallop is left but it's barely anything and that's it the only reason you've got any other tool path at all is its adding a little bit to do some work where these two fill it's meet but otherwise what a clean tool path we're not cutting air we're going to get better part finish and edge quality tolerances surface finish just such a win if you guys want to see we'd be happy to can this whole part up for you guys or walk through some of these ops here on a future fusion Friday otherwise we appreciate the comments the likes and the thumbs up take care see you next Friday [Music]

Channel: NYC CNC

Views: 79,507

Keywords: fusion 360, how to, tutorial, machine shop, nyc cnc, DIY, machining, beginner, fusion 360 tutorial, tips and tricks, Fusion 360 CAM tutorial, computer aided machining, HSM Works, toolpath containment, 2d adaptive, 3d contour

Id: vjz4_cscrAE

Length: 14min 53sec (893 seconds)

Published: Thu Nov 24 2016