![]() Add a ringThe cap will be a slightly loose fit. That will leave a 2mm thick base, which will both be enough to print on and enough to make a solid lid for the finished cap.8. But if we drag the arrowdown rather thanup, were able to sink it into the cylinder, so creating a void inside.We made the cap 15mm high, so lets set the depth of this hole to 13mm. Drag the extrusionAfter choosing to extrude the shape, an arrow appears on the object which we drag to set the depth of the extrusion.Wed normally think of extrusion as a process by which a shape is given extra height, and thats certainly a common use for it. The third one along is Extrude, so select this to begin the extrusion process:ħ. Clicking on this gear pops out a range of tools that can be applied to the object. Choose to extrudeWhen you select any object by clicking on it, a tiny gear appears next to it. Set the sizeThe size of the bottle itself is 35.5mm, so lets make the opening 36mm in order to give it enough clearance to slip on and off easily.Adiameter of 36mm means aradius of 18mm, so we can set that numerically just by typing the figure into the box.6. The second batch of toolbar icons is theSketch set, so use this to select the Circle tool:ĥ. Make the openingTo make the lid hollow, we need to use a different tool. That means aradius of 20mm, so type in that figure.As for the height, thats really a matter of comfort I reckoned 15mm a little over half an inch would be deep enough to provide enough of a surface to be able to twist it on and off easily.4. You can also type numbers in here to set precise measurements, which is more accurate than simply dragging the cylinder.Our milk bottle has an outside diameter of 35.5mm, so lets give the cap a diameter of 40mm to allow for the thickness of the filament. As you do so, youll see a pop-up showing the radius and height. Draw the cylinderClick the tool on the ground plane in the artwork window, and drag to set the size. Click on this, then choose the Cylinder from the pop-up choice beneath:ģ. The first icon is for so-called Primitives cubes, spheres, and so on. Choose your toolsThe toolbar at the top contains all the tools youll need to get designing. Its more accurate, and more compatible with design and measurement software.2. The first step was to measure the bottle top, which showed it to have an external diameter of 35.5mm and an internal opening of 27mm.Even if youre used to working in inches, you should consider switching to metric for 3D printing. ![]() So I decided to design a 3D-printed replacement lid. ![]() The glass bottles are capped with a foil lid, but once opened the lid no longer seals the bottle especially in transit. Take your measurementsHere in London I still get milk delivered by a real milkman (and yes, he even whistles a jolly tune). It doesnt run as a standard app on any platform, but that means it looks the same on a Mac or a PC.1. Were going to build a simple project to demonstrate the basics of the softwares tool set.Once youve downloaded the software, open it up and youll see a floating window with all the tool and menu elements incorporated within it. Autodesks123D Design changes all that, with a desktop application thats fast, easy to learn and free. Getting started with 123D DesignDownload 123D DesignCAD programs have a reputation for being expensive, clumsy and hard to learn.
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