TOP 5 Pitfalls with FreeCAD and How To Win (Especially for beginners)

if you follow tutorials on YouTube or an alpha platform for freecad then you may have come across problems that you've experienced but the author hasn't this video to help you overcome those problems and I've put together the five top reasons that I've found through the comments where people are full of my tutorials where things have gone wrong and the reasons why so I hope this video helps everybody out there following these tutorials let's have a look at where things can go wrong and how to solve them if you like what you've seen you want to donate to the channel then you can do so via Kofi or coffee at Ko hyphen.com forward slash m-a-n-g-0 or via Paypal at paypal.com forward slash PayPal me four slash Darren b e Stone I also run a patron where you can get Early Access and additional content and that's at patreon.com forward slash mango jelly Solutions links can be found in the channel header on the about page or in the descriptions of these videos so this problem normally happens in the part design and that's when we map a sketch to the face it's important to remember to select a face rather than double click interface if we double click we select the whole pad if I select the face and add a sketch it's mapped correctly and if I add some geometry in here say a circle we can see when we close that's matte on top of that face you can see on the left hand side we have the support and the map mode and you can see it's the face that we selected phase six of the pad that's delete that sketch and see what happens when we double click on the pad so a single click will select face if we double click it slaps the whole object and if we click once and then click again it will select the whole object again if we try and create a sketch upon that face it's going to ask us for the plane to place upon and this is where problems start occurring if you come across this in the tutorials it's asking to select a face to place upon and you get these planes and for instance I select the X Y plane there it's going to place it upon the X Plus plane on the bottom of your pad so when we add a sketch in here well we won't be able to see it it's on the bottom and we have to use our sketch and view section so you see on the bottom there so when we close well it's actually on the X Y plane it's not actually attached to the pad and you can see that the support for this sketch is X Y plane flat face how to resolve that don't change the placement we can get into double troubles there we start changing the placement then you create an offset it's simple as taking the support clicking on the button on the end where's the X Y plane we hit clear that's important to clear out our selection and then we select the face that we want as you can see we've got PAD facex as selected there don't double click otherwise we select the pad again so just single click we go face six hit okay and our sketch is now mapped to that face and we can do what we want with our sketch so I'm in the part design for this one and that's say I create a sketch upon this face here create a sketch and we pull into geometry let's pull in this top and I want to create a feature upon here that follows this face because I pulled in the geometry I should be able to do that by creating some kind of feature that's great let's just keep it simple and great a square on here and hit close now if I pad that you can see that it's disappeared now first thing to make sure is that we click on the fit all onto screen just in case it's disappeared off screen as you can see it hasn't so it must be some kind of other issue the other thing to check is we click reverse so what's happened here is that instead of padding along the Y in this direction I actually padded out this way and it's created something called a multi-body object so if I change this to reverse again you can see well nothing's happened but if I hit okay it says pad results has multiple solids this is not spoiling this time and that's because well this has painted out this way and we can't have that we also get that if I cancel that and come into that sketch when we have the geometry that we want to pad or pocket floating above the material so let me just delete that point on object constraint and have this just flowing above so actually if I zoom right in you can see like if I do this then that's actually flown above there and if I zoom out it looks like it's connected but if I close and take that sketch and pad that to that reverse you can see well it's not having it we've still got that result as multiple solids and this can be a bit of a Time scene trying to figure out what you have done so it's normally because you have it not connected correctly to this face so we need to make sure it's on this line or over the light line so and then we pad that and hit OK this time it's taken because it's actually over this line before it was on this Edge which it won't allow or the other way is to make sure that it's connected to the geometry underneath and it's sitting on that line so you can see recompute failed and it's in error result has multiple solids and that's because we need to pad forwards rather than this way this is not connected on that line so that's coming as the pad Go reverse and you can see it's right on that line there very common error is y not closed so I'm in the body in the part design and I create a new sketch long let's say the X Y plane and hit OK so we're here at the moment so if I create say a rectangle this will actually pad so I'll take that sketch and Pat it pads absolutely fine let's cancel that let's break the geometry and I click on this point here and hit delete and just move this slightly and what I'm going to do is zoom right in and bring these close together so this is a usual problem that you may see that it all looks fine so this looks absolutely fine I'll close that and try to pad that it's going to fail you can see that there I hit okay saying why not closed and that's because it's open but as we can see this is the hard to find which part of this is not closed so there is a tool come over to the Sketcher and we're going to validate that sketch click on the sketch come out to sketch validate sketch we get a number of options and we'll get this one here highlight Troublesome vertices if I click that you can see we've got a yellow cross that shows you the exact problem and it's worth changing these tolerances here to allow that to find any missing coincidences at a much smaller scale so because these aren't coincident to each other then that's causing a problem let's close that and double click on the sketch now to make this coincident we can select both of them and use the coincident constraint but if this was sitting on top of here like so and hit close to come back to the part design and hit pad then this will pad although they are not connected together they are coincidence to each other therefore they're on top of each other therefore this is absolutely fine let's have a look at the Sketcher sorry to the model and click on the sketch inside here press the spacebar to show the sketch I'm going to hide this pad if I go into the sketch menu and let's make sure it selected select sketch part sketch menu come down to validate sketch highlight Troublesome vertices you can see it's absolutely fine so we just have to watch out for this because anytime we move the sketch and if we move this just a small fraction of a millimeter then this could cause an error when we go into our pads so you can see our pad there if we hover over it it says wire not closed so this problem is related to the part workbench from broad surfaces and it's when we get a bow tie and rolled surface so if I create a sketch on the YZ plane hit OK and create say a b spline in here and we're going to create something like this Escape close that and I'm just going to create a copy of that so I'm going to control C or come up to edit UK selection I've created another sketch and I'm going to move it along the X plane to come into the placement we look at the position and then we look at the ex and we give this some distance say 80. we've got this one here I can modify that sketch a bit if I want let's create something a bit different close and I'm going to create a ruled surface over in the part workbench between these two sketches so I'll select one side one single edge control select the other and make a broad surface now we get our rule surface if we end up with a bow tie in this then that can be easy resolved the ruled surface has an orientation so when we end up with a bow tie we get something like this so if you've seen this then we can just come into the ruled surface and change the orientation to either reverse or forward and that will fix the bow tie it will be one or the other the default is automatic sometimes when you're stretching out edges from your resistant geometry or your system model and you create two edges any crate a surface across those if we get our bow tie then we just come in to this orientation and change whichever orientation will cause the surface to reform to what we actually want so this problem has been both the part and part design and it can be caused by a number of issues so I think I'm going to create another video at some point regarding how fillets fail but these are the main issues that's come over to the part design and create something in here for everybody create a sketch along the X Y plane and again we're going to use a simple rectangle sketch in here the most common failure of fill it we pad this we have a 10 millimeter pad important to note the length if I fill it an edge so this edge here and add a fill it and set this to 10 millimeters then it's going to fail as you can see the fillet has failed because we feel this is right down to the bottom we can't do that we can't fill it all the way up to 10 millimeters we can do this by going 9.99 and we're going to fill it basically all the way down but this is most common when we fill it in both sides so if I double click this fillet and that's so this to one so we've got to fill it there and we want to add another Edge so we're going to add this edge here and we get a one for that let's go for two so it updates you can see the two foot there and one will be fine now notice the fill it in and they go into the midpoint so we've got a 10 millimeter thickness here if I place this to five then it's going to fail because our 10 millimeters has been fulfilled by five millimeter fill it one way and a five millimeter fill it the other way from one Edge to the other so we do the same we go four point nine nine so they don't share an edge and you can see if we Zoom right in we've got a very very small face there that's bulleted that around there like so another problem if I cancel that and delete the fill it is when an edge is shared so that's create something along this face here so I'm going to create a SketchUp on there select that face create a sketch I'm going to pull in the geometry and I'm going to create something along here so I'm going to create another rectangle like so let's close that and I'm going to pad this this way or about 20 mil so I want to create a fillet between these two edges here let's do that so selected those edges by control selecting them and create a filler and you can see recompute has failed straight away even with a one millimeter fill it so far to create fill it the reason is is because we've got this feature here and this feature here and they are planar to each other so we've got a plane going across this way laying on across this way and really we can find this shape with a single sketch we don't have to we click on the pad click on the data tab and come down and find the refine and set that to true this will remove faces along the same plane as each other if I click off you can see we've got this now that's triangle for that again select one Edge control select the other and use the fillet now affiliate has taken there are problems where fillets converge and we create a problem where we have different size fits that are needed but we're getting to that in another video so I hope this helped with some of the common problems that you've encountered out in the free head world I'm going to do a follow-up video look at more complex problems and how to fix them hope you enjoying these videos and I hope to see you again soon if you like what you've seen you want to donate to the channel then you can do so via Kofi or coffee at Ko hyphen fi.com forward slash m-a-n-g-0 or via Paypal at paypal.com forward slash PayPal me forward slash Darren b e Stone I also run a patreon where you can get Early Access and additional content and that's at patreon.com forward slash mango jelly Solutions links can be found in the channel header on the about page or in the descriptions of these videos I thank everybody that's donated so far it really helps to keep the lights on so I can produce more content and also expand the channel thank you for liking commenting and subscribing to these videos and I hope to see you again in the next one

Channel: MangoJelly Solutions for FreeCAD

Views: 14,843

Keywords: CAD, three, 3D, CNC, Printing, solidworks, autoCAD, freecad 0.19, freecad 19, freecad basics, basic course, fundamentals, learn freecad, freecad beginners, freeCAD 0.20

Id: g8EhDY9cqe8

Length: 17min 41sec (1061 seconds)

Published: Thu Jul 13 2023