FreeCAD는 3D CAD/CAE parametric modeling application입니다. 이것은 주로 기계 설계를 위해 만들어졌지만, 모델링 이력을 정밀하게 제어할 수 있는 3D 개체를 모델링해야하는 다른 모든 용도에도 쓰입니다.
FreeCAD는 현재 개발 중에 있으며 많은 features 목록을 제공합니다. 기능은 아직 상업용 솔루션에 비해 모자라며 대부분의 프로덕션 환경에서 사용하기에는 부족할 수 있지만, 대부분의 애호가 및 많은 소규모 워크샵에는 충분히 강력합니다. FreeCAD 포럼에 참여하는 열정적인 사용자 커뮤니티가 급성장하고 있습니다. 많은 예제들이 FreeCAD로 개발된 품질 프로젝트입니다.
모든 오픈 소스 프로젝트와 마찬가지로 FreeCAD 프로젝트는 개발자가 제공하는 단방향 작업이 아닙니다. 커뮤니티 성장에 따라 기능을 늘리고 안정화됩니다 (버그 수정). FreeCAD를 사용할 때 이것을 잊지 마십시오. 원한다면 FreeCAD에 직접적인 영향을 미치고 FreeCAD 돕기 할 수 있습니다!
우선, FreeCAD를 내려받고 설치하세요. 현재 버전과 업데이트 정보는 Download 페이지를 보고, 설치 명령은 설치 페이지를 보세요. 윈도(.msi), 데비안 및 우분투(.deb), 오픈수세(.rpm) 및 맥 OSX에 사용할 수 있는 설치 패키지가 있습니다. FreeCAD는 다른 많은 Linux 배포판의 패키지 관리자로부터 구할 수 있습니다. 가장 최근의 64 비트 Linux 시스템에서 실행되는 독립 실행형 AppImage 실행 파일도 사용할 수 있습니다. FreeCAD는 오픈 소스이므로, 소스 코드를 가져 와서 직접 컴파일 할 수도 있습니다.
FreeCAD 인터페이스의 기본 개념은 workbenches로 분리된다는 것입니다. A workbench is a collection of tools suited for a specific task, such as working with meshes, or drawing 2D objects, or constrained sketches. You can switch the current workbench with the workbench selector (6). You can customize the tools included in each workbench, add tools from other workbenches or even self-created tools, that we call macros. Widely used starting points are the PartDesign Workbench and Part Workbench.
FreeCAD를 처음 시작하면, start center에 있습니다. 여기는 버전 0.16:
FreeCAD 0.17을 위한 start center 스크린샷
The Start Center allows you to quickly jump to one of the most common workbenches, open one of the recent files, or see the latest news from the FreeCAD world. You can change the default workbench in the preferences.
3D 공간 항해하기
FreeCAD has several different navigation modes available, that change the way you use your mouse to interact with the objects in the 3D view and the view itself. One of them is specifically made for touchpads, where the middle mouse button is not used. The following table describes the default mode, called CAD Navigation (You can quickly change the current navigation mode by right-clicking on an empty area of the 3D view):
|Press the left mouse button over an object you want to select.
Holding downallows the selection of multiple objects.
|Hold the middle mouse button, then move the pointer.||Use the mouse wheel to zoom in and out.
Clicking the middle mouse button re-centers the view on the location of the cursor.
|Hold the middle mouse button, then press and hold the left mouse button, then move the pointer.
The cursor location when the middle mouse button is pressed determines the center of rotation. Rotation works like spinning a ball which rotates around its center. If the buttons are released before you stop the mouse motion, the view continues spinning, if this is enabled.
A double click with the middle mouse button sets a new center of rotation.
|Hold the middle mouse button, then press and hold the right mouse button, then move the pointer.
With this method the middle mouse button may be released after the right mouse button is held pressed.
오른손으로 마우스를 쓰는 사람은 이 방법이 첫 번째 방법보다 쉬울 겁니다.
|Pan mode: hold the introduced in version 0.17key, press the right mouse button once, then move the pointer.||Zoom mode: hold the introduced in version 0.17and keys, press the right mouse button once, then move the pointer.||Rotate mode: hold the introduced in version 0.17key, press the right mouse button once, then move the pointer.|
You also have several view presets (top view, front view, etc) available in the View menu, on the View toolbar, and by numeric shortcuts ( , , etc...). By right-clicking on an object or on an empty area of the 3D view, you have quick access to some common operations, such as setting a particular view, or locating an object in the Tree view.
FreeCAD와 함께하는 첫 단계
FreeCAD's focus is to allow you to make high-precision 3D models, to keep tight control over those models (being able to go back into modelling history and change parameters), and eventually to build those models (via 3D printing, CNC machining or even construction worksite). It is therefore very different from some other 3D applications made for other purposes, such as animation film or gaming. Its learning curve can be steep, especially if this is your first contact with 3D modeling. If you are struck at some point, don't forget that the friendly community of users on the FreeCAD forum might be able to get you out in no time.
The workbench you will start using in FreeCAD depends on the type of job you need to do: If you are going to work on mechanical models, or more generally any small-scale objects, you'll probably want to try the PartDesign Workbench. If you will work in 2D, then switch to the Draft Workbench, or the Sketcher Workbench if you need constraints. If you want to do BIM, launch the Arch Workbench. If you are working with ship design, there is a special Ship Workbench for you. And if you come from the OpenSCAD world, try the OpenSCAD Workbench.
아무 때나 workbenches 전환할 수 있으며, and also customize your favorite workbench to add tools from other workbenches.
PartDesign 및 Sketcher workbenches와 함께 일하기
The PartDesign Workbench is made to build complex objects, starting from simple shapes, and adding or removing pieces (called "features"), until you get to your final object. All the features you applied during the modelling process are stored in a separate view called the tree view, which also contains the other objects in your document. You can think of a PartDesign object as a succession of operations, each one applied to the result of the preceding one, forming one big chain. In the tree view, you see your final object, but you can expand it and retrieve all preceding states, and change any of their parameter, which automatically updates the final object.
The PartDesign workbench makes heavy use of another workbench, the Sketcher Workbench. The sketcher allows you to draw 2D shapes, which are defined by applying Constraints to the 2D shape. For example, you might draw a rectangle and set the size of a side by applying a length constraint to one of the sides. That side then cannot be resized anymore (unless the constraint is changed).
Those 2D shapes made with the sketcher are used a lot in the PartDesign workbench, for example to create 3D volumes, or to draw areas on the faces of your object that will then be hollowed from its main volume. This is a typical PartDesign workflow:
- 새 sketch 만들기
- Draw a closed shape (make sure all points are joined)
- sketch 닫기
- Expand the sketch into a 3D solid by using the pad tool
- Select one face of the solid
- 두번째 sketch 만들기(this time it will be drawn on the selected face)
- 닫힘 shape 그리기
- sketch 닫기
- Create a pocket from the second sketch, on the first object
Which gives you an object like this:
At any moment, you can select the original sketches and modify them, or change the extrusion parameters of the pad or pocket operations, which will update the final object.
Working with the Draft and Arch workbenches
The Draft Workbench and Arch Workbench behave a bit differently than the other workbenches above, although they follow the same rules, which are common to all of FreeCAD. In short, while the Sketcher and PartDesign are made primarily to design single pieces, Draft and Arch are made to ease your work when working with several, simpler objects.
The Draft Workbench offers you 2D tools somewhat similar to what you can find in traditional 2D CAD applications such as AutoCAD. However, 2D drafting being far away from the scope of FreeCAD, don't expect to find there the full array of tools that these dedicated applications offer. Most of the Draft tools work not only in a 2D plane but also in the full 3D space, and benefit from special helper systems such as Work planes and object snapping.
The Arch Workbench adds BIM tools to FreeCAD, allowing you to build architectural models with parametric objects. The Arch workbench relies extensively on other modules such as Draft and Sketcher. All the Draft tools are also present in the Arch workbench, and most Arch tools make use of the Draft helper systems.
전형적 workflow 와 Arch 및 Draft workbenches 는:
- Draw a couple of lines with the Draft Line tool
- Select each line and press the Wall tool to build a wall on each of them
- Join the walls by selecting them and pressing the Arch Add tool
- Create a floor object, and move your walls in it from the Tree view
- Create a building object, and move your floor in it from the Tree view
- Create a window by clicking the Window tool, select a preset in its panel, then click on a face of a wall
- Add dimensions by first setting the working plane if necessary, then using the Draft Dimension tool
Which will give you this:
Tutorials 페이지 더.
Freecad, as an open source software, offers the possibility to supplement its workbenches with addons.
The Addon principle is based on the development of a workbench complement. Any user can develop a function that he or she deems to be missing for her/his own needs or, ultimately, for the community. With the forum, the user can request an opinion, help on the forum. It can share, or not, the object of its development according to copyright rules to define. Free to her/him. To develop, the user has available scripting functions.
There are two types of addons:
- Macros: short snippets of Python code that provide a new tool or functionality. Macros usually start as a way to simplify or automate the task of drawing or editing a particular object. If many of these macros are collected inside a directory, the entire directory may be distributed as a new workbench.
- External workbenches: collections of tools programmed in Python or C++ that extend FreeCAD in an important way. If a workbench is sufficiently developed and is well documented, it may be included as one of the base workbenches in FreeCAD. Under External workbenches, you'll find the principle and a list of existing library.
마지막으로, FreeCAD의 가장 강력한 기능 중 하나는 scripting 환경입니다. From the integrated python console (or from any other external Python script), you can gain access to almost any part of FreeCAD, create or modify geometry, modify the representation of those objects in the 3D scene or access and modify the FreeCAD interface. Python scripting can also be used in macros, which provide an easy method to create custom commands.
- 자세한 특징 목록은 release notes를 보세요.