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Scale Modeling Tutorials: 3D Modeling Basics for 3D Printing

In my last article, I discussed the use of 3D printing for scale model hobbyists. Hobbyists are discovering 3D printing to be a useful tool to make customized parts, or even create detailed models from scratch and shared a few of my own 3D printed models. 3D modeling may seem daunting to many 3D printing hobbyists, but the learning curve isn’t as steep as many think and there has never been a better time to start learning. It’s fun to browse sites like Thingiverse for free models, but there’s a certain satisfaction that comes from printing something you designed yourself. If you’re interested in making your own models, I’m here to help with everything you need to get started.

I will be sharing more hobby-related tutorials in the future, including more detailed modeling walkthroughs, the best settings for printed models and how to finish and paint your prints. For now though, let’s jump into the basics of CAD design.

CAD, or Computer Aided Design, is any computer software used to create, modify or optimize designs. It has a wide range of applications, from concept design, to machining and manufacturing and, of course, 3D printing! There are a number of CAD options available today, ranging in price from free to outrageously expensive. Fortunately, hobbyists today don’t have to compromise on quality and functionality when opting for free options. My personal favorite is Fusion 360 and this article will focus on teaching you everything you need to start making your own models with the software.

Autodesk’s Fusion 360 is a powerful, cloud-based CAD software that offers a number of features. It’s also free for non-commercial use! Non-commercial use, in this case, means anyone making less than $100,000 per year using the software. This makes Fusion 360 the perfect option for hobbyists looking to make their own models.

Getting Started

Fusion 360 can be downloaded from Autodesk’s website and choosing the non-commercial/personal download option and following the download instructions. After creating an Autodesk account and following the download instructions, Fusion 360 is yours to play around with!

Navigating Fusion 360:

When you first open Fusion 360m you’ll see an empty workspace with three planes highlighted on the X, Y and Z axes. This is where we’ll be drawing out sketches and creating objects (more on that later). Note: if you don’t see a grid when you first open the program, navigate to the “Grid and Snaps” settings at the bottom (the icon that looks like a grid), clicking the dropdown arrow and checking “Layout Grid”.

The first thing you need to know is how to move around in the workspace. Use your mouse wheel to zoom in and out. Pressing down on the mouse wheel and moving your mouse will allow you to pan back and forth. Holding shift and the mouse wheel and moving your mouse will allow you to orbit around the scene. You can also select different camera angles by clicking on different axes (X, Y and Z) or views (Back, Front, Top, etc.) in the top right.

Views and navigation in Fusion 360 can be customized in the selection box at the bottom. In the orbit settings, I prefer “Constrained Orbit”, which makes the environment easier to navigate. As mentioned before, I like to include the layout grid in the “Grid and Snaps” settings, but that can be unchecked if need be. I prefer the default settings for everything else.

Basic Overview of the Workspace

Now that you know how to move around in Fusion 360, let’s go over some of the basic functions and where to find them. Clicking the “Show Data Panel” box in the top left will bring up a list of your recent designs. If you’ve just opened Fusion 360 for the first time, this should be empty. Clicking the “File” dropdown right next to it will bring up the basic options you’d expect, like opening a new file, saving and exporting designs (as an STL, OBJ, etc.). There’s also a quick-save icon next to that.

Directly below those options you’ll find a Workspace dropdown, allowing you to select a design environment. You’ll find a number of environments, including Design, Render, Animation, Simulation, Manufacture and Drawing. The default should be set to Design, the workspace in which we will create our design using sketches and objects. I may dive into the other workspaces in future tutorials, but the Design environment is all you will need to start making your own models.

To the right of the Workspace dropdown you’ll find the main design ribbon, with four tabs (Solid, Surface, Sheet Metal and Tools). We will be focusing on the Solid tab, so click on that if it’s not already selected by default. This ribbon contains all the tools we need to start creating so let’s start with the most basic tools you’ll need to start off with.

The CAD Design Process

There are really only two things you need to know how to do to start modeling:

Create a two-dimensional sketch
Do something to it

“Do something” can mean a number of actions (extruding, revolving, lofting, etc.), but that’s the basic process and really the steps you’ll follow to start creating models. Before we jump into an actual example, though, let’s go over the basic components and functions of CAD design.

Point: a precise location on a plane, represented by a single dot

Edge/Line: The distance between two points

Face: A flat surface formed by the intersection of three or more lines

Plane: a flat surface formed by the intersection of two axes or lines

Sketch: a two-dimensional drawing

Object: a three-dimensional shape

Creating an Object

Now for the fun part! Let’s use that information and the basic functions in Fusion 360 to create a basic, three-dimensional object. Following our two basic steps, we’re going to: 1. Create a sketch, and 2. Do something to that sketch—in this case extrude it.

Creating a Sketch

To create a sketch, navigate to the ribbon at the top and click “Create Sketch”. Of course, the sketch needs to be created somewhere, either on a plane or a face, so click the XY plane at the center of the workspace (the yellow square formed at the intersection of the X and Y axes). The camera should now jump to a view directly above the plane you selected. You will also notice a new “Sketch” tab at the top and several new options to choose from. From the “Create” dropdown, select “Rectangle”, then “Two Point Rectangle”. This will allow us to draw a basic rectangle. Click anywhere on the workspace to place the first point of the rectangle. Next, move your mouse until your rectangle is the desired size. Now, just click and you’ll notice the rectangle turn blue. Congratulations! You’ve just created your first sketch!

A Quick Note on Hotkeys

Eventually, you will want to learn some of the basic hotkeys in Fusion 360. Instead of clicking the “Create Sketch” button and selecting Rectangle, typing the “R” key will automatically create a new sketch and allow you to start drawing a new rectangle. Similarly, typing “C” will create a new sketch and allow you to draw a circle.

Doing Something to Our Sketch

Now, it’s time to “do something” to our sketch. In this case, we will be extruding the sketch, which basically means turning a 2D sketch into a 3D object. First, click “Finish Sketch” in the top right. You should now see the “Solid” tab from before. Click the “Create” dropdown and select “Extrude” (or just type “E”). Now, click the sketch we just created, which will highlight the rectangle in a darker blue. In some cases, Fusion 360 will automatically select the last sketch you created. You’ll notice an arrow over your sketch. Click and hold the arrow, and drag it up. When you like the height of your extrusion, simply click “Ok” on the Extrude window. Congratulations! You’ve just created your first 3D object! Now, let’s repeat those steps and build on our object.

Taking it Further

Let’s keep making sketches and manipulating them to showcase some of Fusion 360’s other functions. Of course, a sketch can be created on a surface. So, let’s add a cylinder on top of our box. Create a circle by typing “C” (it’s never too early to learn the hotkeys) and click on the top face of the box. Now, click somewhere in the middle of the top face to place the circles center point. Then move your mouse to draw out your circle and click to create the sketch. Next type “E” to extrude. Click the circle and extrude the circle as we previously did with the rectangle. There are a few options available in the “Extrude” window before clicking ok. For now, focus on the “Operation” dropdown. Selecting “Join” will join the current object. Selecting “New Body” will create a new object that can be moved separately from the box below it. Let’s just join them for now and click ok.

Let’s draw another circle on the top of our cylinder. Type “C” and click the top of the Cylinder. Create a sketch as we did before. Type “E” to extrude and click the circle just as before. This time, however, drag the sketch down, instead of up. You will notice the new shape is now red and the “Operation” in the Extrude window is set to “Cut”. Instead of creating a new shape, we’re now cutting geometry out of the existing shape. Click “OK” in the Extrude window.

Stay tuned, because this is just the beginning. In the second half of this tutorial, we’ll be expanding on what we’ve learned so far to create a simple fuel canister for a spacecraft. If you enjoyed this tutorial and want to see some of my models, check out my Instagram, where I share pictures of my designs and prints as well as painting tips.

The post Scale Modeling Tutorials: 3D Modeling Basics for 3D Printing appeared first on 3DPrint.com | The Voice of 3D Printing / Additive Manufacturing.

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Handheld Bioprinter to Treat Skeletal Muscle Injuries

If having bioprinters offered to physicians and health center employees might have a substantial influence on their work, then simply envision what portable bioprinters would provide for the treatment of distressing injuries. These brand-new gadgets, a few of which we have actually experienced in the previous number of years, are not all that typical and generally extremely tailored, nevertheless, scientists have actually understood how crucial they might be for injury care. The concept behind portable bioprinters is that they might provide the innovation directly to the client, targeting the wanted surface area thanks to their movement. In the past, we have actually reported numerous tasks of portable bioprinters providing cells straight onto bone and cartilage throughout surgical treatment , in addition to to deal with corneal ulcer , and mainly for recovery burn injuries by means of cartilage and skin regrowth . The innovation has excellent possible, which is why, previously this year, a group of biomedical engineers from the University of Connecticut ‘‘ s School of Dental Medicine established a portable 3D bioprinter that might reinvent the method musculoskeletal surgeries are carried out.

The bioprinter makes it possible for cosmetic surgeons to deposit scaffold products to assist support cellular and tissue development straight into the flaw websites within weakened skeletal muscles. Established by Ali Tamayol, an associate teacher at the biomedical engineering department at the University of Connecticut, the innovation can 3D in situ printing of adhesive scaffolds. The professional even considers it a paradigm shift in the quick yet accurate filling of complicated skeletal muscle tissue flaws.

In situ bioprinting of cell-laden GelMA hydrogels for the treatment of VML injuries (Image: ACS Appl. Bio Mater. 2020, 3, 3, 1568-1579)

Tamayol’’ s research study was just recently released in the American Chemical Society journal , in a post entitled” In Situ Printing of Adhesive Hydrogel Scaffolds for the Treatment of Skeletal Muscle Injuries .” According to the private investigators, existing techniques for plastic surgery have actually been mainly insufficient in dealing with volumetric muscle loss( the surgical or distressing loss of skeletal muscle which leads to practical disability), contributing to the reality that the geometry of skeletal muscle flaws in this kind of injuries differs on a case-by-case basis. They think about that as an outcome, 3D printing innovation has actually become an up and coming service to assist rebuild muscle. They likewise declare that the time and centers required for imaging the problem website, processing to render computer system designs, and print an appropriate scaffold avoid instant reconstructive interventions post-traumatic injuries.

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To get rid of these obstacles, this brand-new research study proposes that gelatin-based hydrogels are printed straight into the problem location and cross-linked on website.

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“ The printer is robust and enables appropriate filling of the cavity with fibrillar scaffolds in which fibers look like the architecture of the native tissue, ” suggested Tamayol. “ This is a brand-new generation of 3D printers than allows clinicians to straight print the scaffold within the client ’ s body, and most importantly, this system does not need the existence of advanced imaging and printing systems. ”

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The portable, partly automated, bioprinter is an extrusion-based gadget efficient in continually extruding biomaterialsand consists of an integrated ultraviolet( UV) source of light for cross-linking of the extruded bioink efficient in situ printing of adhesive scaffolds in order to get rid of the difficulties related to the treatment of a volumetric muscle loss injury . The scientists declare that the platform can print photo-cross-linkable hydrogels such as gelatin methacryloyl (GelMA) for this kind of injuries right away. GelMA is a collagen-derived biomaterial that carefully simulates the extracellular matrix (ECM )of native skeletal muscles, in addition, GelMA sticks to body tissues and has actually been utilized as a bioadhesive, yet they suggested that they are the very first to examine the adhesion of GelMA hydrogels to skeletal muscle.

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The portable 3D bioprinter geared up with a UV light for in situ cross-linking of the printed scaffolds( Image: ACS Appl. Bio Mater. 2020, 3, 3, 1568-1579)

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The research study recommends that in situ printing of GelMA is anticipated to get rid of the requirement for extra surgical treatments and resolve the difficulties of hydrogel-based scaffold implantation, and the scaffolds from the bioprinter adhere exactly to the surrounding tissues of the injury and imitate the residential or commercial properties of the existing tissue, getting rid of the requirement for any suturing.

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Indranil Sinha, a co-author and cosmetic surgeon at Brigham and Women ’ s Hospital (a Harvard Medical School Teaching Hospital) with know-how in dealing with muscle injuries, stated: “ An excellent service presently does not exist for clients who suffer volumetric muscle loss. An adjustable, printed gel develops the structure for a brand-new treatment paradigm that can “enhance the care of our injury clients. ”

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It is clear from the released product that implanting the hydrogel-based scaffolds effectively needs a really particular biomaterial to be printed that will stick to the flaw website.And while bioprinted scaffolds simulating skeletal muscles have actually been developed in vitro, the scientists recommend that these have actually not been effectively utilized on a real topic, leaving the existing 3D bioprinting innovation with a couple of issues.

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Instead, Tamayol ’ s service repairs the issue, considering that the effectively printed gelatin-based hydrogel bioink efficiently followed problem websites when checked on mice with volumetric muscle loss injury. The mice’revealed a considerable boost in muscle hypertrophy following Tamayol ’ s treatment, that is, a boost and development of muscle cells.

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Surgical implantation of GelMA hydrogels through in situ printing into mice with a volumetric muscle loss injury( Image: ACS Appl. Bio Mater. 2020, 3, 3, 1568-1579 )

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The group of 15 professionals had the ability to show that this bioprinter works with different kinds of bioinks, consisting of polymeric options and photo-cross-linkable hydrogels traditionally utilized in tissue engineering and bioprinting, which the bioprinter allowed printing on nonflat surface areas, which can not be accomplished utilizing routine fixed bioprinters. They likewise checked the expediency of in situ printing of GelMA hydrogel for the treatment of muscle injuries and recognized that the printing pressure and used shear tension utilizing the portable bioprinter had no unfavorable influence on the practicality and expansion of myoblasts (the embryonic precursors of myocytes, likewise called muscle cells).

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The research study, moneyed by the National Institutes of Health and The Gillian Reny Stepping Strong Center for Trauma Innovation , showed that the portable printer will alter the fast yet accurate filling of intricate skeletal muscle tissue problems.

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Although the brand-new system remains in the early phases of screening, it might ultimately offer a method to deal with clients with severe injuries. Tamayol and Sinha have actually currently submitted a patent on this innovation for the treatment of musculoskeletal injuries. And as part of his extensive interest in the field, Tamayol likewise just recently established a clever plaster to assist medical take care of individuals with persistent injuries. It appears that the viability of the in situ printed bioink for the shipment of cells achieved success when straight printed into the flaw website of mice with volumetric muscular loss injury, let’s hope it can likewise operate in the future to promote skeletal muscle development in people with this type of distressing injuries.

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The post Handheld Bioprinter to Treat Skeletal Muscle Injuries appeared initially on 3DPrint. com|The Voice of 3D Printing/ Additive Manufacturing .

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