Intuitive and versatile, including Website Generator, spellchecker, thesaurus, attachments, search engine, recycle bin, and much more! A 2D & 3D parametric CAD version of their commercial product, includes an FE solver and dynamics simulator. The U.S army has released a CAD system to open source, which is now being enhanced by the open source community. Free open source software for drawing circuit diagrams, comes with a library of standard symbols.
Free light version of their commerical PCB design product, this one does save to production file formats (Gerber etc). Free software to analyze the resistance and power for a ship and other hydrodynamic calculations for vessels and underwater vehicles. Open source cad program that lets you use drag and drop to lay-out rooms, houses and apartments in 2d. Free 2D general diagramming software which can be used for garden design, building & room plans as well as mechanical & electronic drawings.
Simple creation of floor plans, 3D models, and interior design concepts, it uses real world objects such as walls, doors, windows and stairs. Designed for land surveyors, processes and adjusts raw field survey data, computes and adjusts map traverse data, performs map or deed checks, calculates areas and perimeters, performs coordinate transformations. Freeware program to convert between the following formats ACIS SAT, IGES, STEP, STL, VRML and Open CASCADE BRep. July 10, 2012 Evan Yares : 3 CommentsSometimes really good tools don’t have to break the bank. IronCAD COMPOSE lets you build up assemblies by dragging and dropping individual parts from catalog files.
Once files are imported into IronCAD COMPOSE, you can add attachment points on them (to allow smart snapping between parts), and, if you like, save them in a catalog, for later reuse.
A good example of a company that uses IronCAD catalogs is Skyline Displays, a well known supplier of trade show exhibit furniture. IronCAD did, however, put enough capabilities into COMPOSE that it’s a useful and flexible tool for a lot of ancillary jobs that typical CAD systems aren’t really appropriate for. As you might imagine, IronCAD is hoping that a lot of people will use COMPOSE for interesting projects, and will start liking its drag-and-drop method of operation. Inventor Fusion is a “technology preview.” It’s Autodesk’s attempt to grab not just the attention of their existing users, but those of their competitors as well.
While Inventor Fusion is designed to work in conjunction with Autodesk Inventor (the non-fusion version), it stands on its own merits, in three particular areas. Second, Inventor Fusion has capable tools for modeling and editing both solid and surface models.
And, third, Inventor Fusion includes a couple of tools that make it really interesting for preparing models for CAE. When Autodesk gets around to charging for Inventor Fusion, they may include more with the software, or, more likely, bundle it with some of their other products. The good 3D MCAD systems all support the semi-automatic creation of drawing views from 3D models, as well as model-to-drawing associativity of dimensions. One nice bonus is support for drag-and-drop diagramming for elecrical schematics and P&ID diagrams.

Browse the most current issue of Design World and back issues in an easy to use high quality format. Solar Power World reaches executives, managers, engineers, installers and technical professionals involved in the design, manufacturing, development, and installation of solar power projects. EE World Network of sites feature industry experts covering product news and reviews, EE video, “how-to” articles, best practices in electronics design and electronic datasheet resources. Rigid and flexible bodies, various connectors in penalty and Lagrange formulation, rotordynamics, IOBlocks to simulate controllers, parameter variation and optimization, possibility of coupling with other simulation software (e.g. It is set up to be used with Simulink which is not free and you need to use MathLab to run it. Models can include springs, dampers, actuators, propulsion engines,gears, cables, links, fixed points, Gravitation fields, perturbations, programmable control systems, sensors & friction.
Download free 30 days trial VariCAD 2011 mechanical engineering software for Windows and Linux.
It does not use history based modeling, instead click directly anywhere on the model to add or adjust features.
They also have a paid version called nanoCAD Plus, but you will not miss any of those additional features while using the free version.
Files created by the student edition cannot be opened by any other software including their own commercial version. As this is a free version of their commerical product, only one layer can be created for 2D modeling and the model size is limited to 200kB. It allows you to generate all the files required to take your project from circuit diagram to layout schematic to a circuit board built project. Light version of their commerical product so expect limitations on the number of pins, parts and PCB size. Heres’s how it works: You open up a blank scene file in IronCAD COMPOSE, and then drag and drop models and assemblies from other CAD systems into that scene. If that happens, a certain number of people are going to take a look at IronCAD, and realize that it’s a pretty interesting tool—even working along side other CAD systems. Autodesk won’t be giving away Inventor Fusion forever, but for at least until next April, you can download a copy from Autodesk Labs, and enjoy using without going out of pocket even a single cent. While, in my experience working with Inventor Fusion, I found some files that I was unable to edit as I wished, my sense was it was more a matter of my lack of experience than Inventor Fusion’s limitation.
It has a model simplification wizard, to remove small features, and has a wizard to create fluid volumes from assemblies, for CFD. For now, as a standalone product (and one that’s free as well), it has a prominent place in my collection of tools. Another is Goal Seek, a function that combines free-body diagrams with a 2D parametric sketch solver. You may be able to use it without Simulink if you make the effort using some free visualization tool. Gerbers (Extended RS-274-X), Excellons, BOMs, component lists and positions are possible along with DXF (import and export) and IDF for interfacing to mechanical CAD software.
But there are far fewer free programs in the CAD realm—if only because CAD software is incredibly difficult to create. These vendors, of course, hope that you’ll love the software they’re giving away, and will buy their commercial software—but they’re not playing the “let’s give away useless software” game.

You then move those models and assemblies as you like, until you get an arrangement you like.
Your sales people can use it to create customer presentations of configure-to-order products.
It works with existing parts and assemblies, and lets you compose what are essentially digital mock-ups. Using IronCAD COMPOSE and those catalogs, almost anyone could snap-together a custom Skyline trade show booth in no time flat. First, because COMPOSE only came out in May of this year, and second, because IronCAD wouldn’t be nuts enough to put everything Skyline needed (for example, a quotation system and an interface to ERP) into a program that they were giving away for free.
There’s quite a bit of interest among CAE people in using direct modeling CAD systems for model preparation. It is certainly good general purpose CAD software, but it’s never been the best mechanical drafting software you could get. You can lay out your office, or your assembly line, or most any other space you’d like, in full 3D. To lay out a conveyor, for example, you just open the conveyor catalog, and start dropping parts and sub-assemblies into the scene. Rather, it lets you edit most any 3D CAD files—solid or surface—without the need to understand how they were built, or even what CAD system created it. Its selection tools are nicely done, and its sketching and modeling tools are context aware. Autodesk has bought several CAE companies over the last several years, so it makes sense that they would include these tools in Inventor Fusion. For really good 2D drafting software, you need to look for a CAD product with a heritage that can be traced back to the days of the Apollo space program, when Huntsville, Alabama was the epicenter of rocket research in the United States. It’s a true design engineering tool, and its results can be used to drive parameters in your 3D CAD system.
You're invited to qualify for the fastest growing design engineering publication on the market today. You usually import a PADS netlist generated from a schematic capture program (TinyCad) then you can run connectivity checks to validate your layout against the schematic. And other people in your organization can use the IronCAD viewer to explore those compositions.
No matter which CAD systems you’re using, you should be able to create one or more of these formats.
When you drop one part onto another part, they automatically snap together in the proper orientation, based on their attachment points. They’re rather have you using their 2D software for free than paying their competitor to use their 2D software. Or, if you prefer, you can save your compositions as animation files, rendered images, or 3D PDFs, and put them up on your website. If you prefer to work with live CAD files (as I do), for $195 IronCAD will sell you a translator (COMPOSE Trans) that’ll read native files from ACIS, PARASOLID, IGES, STEP, CATIA, Pro-E, Unigraphics, SolidWorks, and Inventor.

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