Librecad

Creation, Preparation and Selection of the Geometry

1. In the first step, the polylines are created which represent the geometry that has to be cut:
2. All contours must have a suitable start point. This must be a start point at which the contour can be approached using a lead in. For our example, this is not the case for the inner contour (the red reference point is the start point of the selected polyline):By right-clicking on the contour, the start point can be set to another position:Click on the new position of the start point. This can be an existing node, or any other point on the polyline. Here the center of the lower segment is selected:All contours are now ready for processing. With the function Select > Select All all start points of all contours can be highlighted (red):The circle is not a polyline, and may have its start point at any point.
3. Select all the contours that are to be processed with the same machining parameters and the same tool. In this example, these are all the contours in the drawing.

License

• I use more than one computer / operating systems — how many licenses do I have to purchase?Licenses are per user, not per installation or system. With one single user license, you may install and use QCAD on multiple computers and multiple operating systems as long as you are the only user. All of our QCAD products give you access to QCAD packages for all supported platforms either through a download area or on DVD.
• For how long is my QCAD license valid? QCAD licenses are not time limited. You can buy QCAD now and continue using it without any limitations for as long as you like. During one year after your purchase, you can download free updates of new versions of QCAD. After one year, you can choose to renew your license at a 30% update discount and continue receiving updates or you can keep using the version you currently have. An update discount coupon code is sent to you via e-mail before your free access to updates expires.
• Is QCAD Open Source Software?Yes, starting with version 3.1, the QCAD software is distributed under the GPLv3 with exceptions. In accordance with these exceptions, add-ons and plugins may be released under their respective licenses. For example the QCAD Pro add-on or the QCAD/CAM add-on are proprietary plugins. 
• What is a Site License and when do I need one?If you are an individual who likes to purchase QCAD, you don’t need to worry about this. Simply purchase a single user license. A site license is a type of software license used by companies, universities and other organizations with 10 to 20 QCAD users. A QCAD site license allows an organization to install QCAD on up to 20 computers.Note that the software itself is identical. If you represent an organization and there are more than 10 people on your site (campus) who use QCAD, you will need at least one site license. If less than 10 people use the software, it is more cost effective to purchase individual single user licenses.
• Do you offer educational licenses / educational site licenses?We offer educational site licenses which are valid for an unlimited number of users at one location (campus).For single users, we occasionally offer educational discounts. Please contact us for details.
• What types of packages / licenses do exist for QCAD?There are three different types of packages for the QCAD software:
  • QCAD Professional is the latest version of QCAD with add-ons for advanced DXF support, DWG support and many extra tools and features. It can be purchased from our online shop.
  • The QCAD Trial packages contain a trial version of QCAD Professional, intended to try the software before you buy it. You can download trial packages from our web site.
  • The QCAD Community Edition is the basic QCAD system, released under an Open Source license. Some Linux distributions contain packages of this QCAD version.

  To compare the features of the QCAD Community Edition against the features of QCAD Professional, please refer to our feature list.

Actions, Tools and Commands

Draw

View

Dimension

Modify

Snap

Info

QCAD Community Edition code source

Le code source de QCAD version 3.25.1 est publié sous les termes de la GNU General Public License version 3 (GPLv3). Veuillez noter que la GPLv3 s’applique uniquement au code source de QCAD 3.25.1, pas au code source des bibliothèques tierces ou d’autres ressources contenues dans le paquet (manuel utilisateur, polices, patrons, etc.). Pour une liste complète des licences, veuillez vous référer au fichier LICENSE.txt contenu dans le paquet.

Pour obtenir de l’aide et du soutien, veuillez consulter notre forum d’utilisateurs ou postez vos questions ici.

• QCAD code source : v3.25.1.0.zip
• License : GPLv3
• Version : 3.25.1
• git : https://github.com/qcad/qcad
• Exigences : Qt édition développeur (4.7, 4.8, 5.4, 5.5, 5.6, 5.7, 5.10, 5.11), C++ compilateur.

Ceci est code source destiné aux développeurs avertis en informatique. Le code source doit être compilé à l’aide d’un compilateur C++.
Ce n’est pas un installateur. Les installateurs sont disponibles en haut de cette page.

QCAD/CAM

The following features are available in QCAD/CAM only (in addition to all the QCAD Professional features above):

• Nesting:
  • Automatic nesting of selected parts into chosen sheets
  • Support for islands in parts and sheets
  • Support for polylines, loose entities, splines, text entities
  • Part-in-part placement
  • Align part angle to X/Y axis
  • Mutithreading
  • Quantity:
    • Define quantity for each part
    • Define quantity multiplier when nesting
• GERBER import
• Tool management:
  • Tool list
  • Add tools
  • Edit tools
  • Remove tools
• Toolpath management:
  • Toolpath list
  • Edit toolpath parameters
  • Remove toolpaths
  • Regenerate toolpaths from selection
• Creating toolpaths from selected entities:
  • Drill toolpath:
    • Cutting Depths:
      • Safe Z
      • Start Z
      • Cut Z 
    • Passes:
      • Single pass
      • Multiple passes
  • Profile toolpath:
    • Cutting Depths:
      • Safe Z
      • Start Z
      • Cut Z 
    • Passes:
      • Single pass
      • Multiple passes
    • Cutter radius compensation:
      • Side:
        • On
        • Outside
        • Inside
      • Direction:
        • Climbing (left)
        • Conventional (right) 
    • Lead in / lead out
      • None
      • Normal
      • Extension
      • Half circle (calculated offset only)
      • Quarter circle (calculated offset only)
      • Eighth circle (calculated offset only)
      • Half circle (calculated offset or G41/G42)
      • Quarter circle  (calculated offset or G41/G42)
      • Eighth circle  (calculated offset or G41/G42)
    • Overcut
    • Add tabs to hold cut out pieces in place
• CAM Export:
  • Tool radius compensation:
    • as G41/G42
    • computed coordinates
  • Entity conversion:
    • Splines as tangentially connected arcs
    • Ellipses as arc segments
    • Arcs as line segments (optional)
    • Other complex entities as lines and arcs
  • Postprocessors:
    • G-Code (generic)
    • DXF (output toolpaths in correct order to DXF)
      • output splines as splines or arcs
      • output ellipses as ellipses or arcs
      • optionally flatten output
      • optionally open output after conversion
      • configure DXF version 
    • EMC2
    • LinuxCNC
    • Mach3
    • TNC145
    • TNC430
    • HP-GL (PLT)
    • … (more can be added)

Extending QCAD

Extending QCAD involves creating an ECMAScript file which adds a user interface component when QCAD is loaded. For example, if the extension is a new tool, the script might add a menu, tool bar button, command or keycode to launch that tool.

When the tool is launched, the same script starts to handle all user interaction to ‘do something’. It might for example show a dialog, ask for some user input, allow the user to specify a position in the drawing, etc. Based on those inputs the script might for example add or modify the contents of a drawing.

Typical use cases for extending QCAD through its script interface are:

• A tool that automatically generates a reusable component from some user given parameters and optionally lets the user position the component in the current drawing.
• A user interface component that displays an interactive drawing or shows information about the current drawing or selection in the drawing.
• A tool that generates a new drawing, based on the currently viewed drawing.
• Importers and exporters for new file formats.
• …

Examples of existing QCAD extensions are:

Almost all tools and user interface components of the QCAD application are implemented as script add-ons. Some tools implement most of their functionality in ECMAScript (e.g. SVG exporter, property editor, drawing tools, modification tools, …) and other tools are mainly implemented in C++ but called through ECMAScript (e.g. DWG importer / exporter based on Teigha).

QCAD C++ Plugins

There are situations in which extending QCAD through scripts alone is not possible. This is mostly the case, if your extension is based on an existing C or C++ library. In that case, you can create a QCAD C++ plugin that wraps your library and adds the necessary hooks to access library functionality through the script interface. Such a plugin can be automatically loaded by QCAD on start up to add functions and classes to the script interface of QCAD. These script extensions can then be used by your script add-ons to make that functionality available as part of the application interface.

A plugin might for example offer export to a file format through an existing library for that format. The plugin registers itself as file exporter and becomes available as a format choice in the File — Save As dialog. Alternatively, it could register a script function to export a document (e.g. exportDocument(document, fileName)). This function could be called by a script add-on which is available through a new menu entry File — Export XY.

Circle

Centre, Point {DrawCircle}: Draw a circle with a given radius by assigning a centre point and a point on the circumference.

Centre, Radius {DrawCircleCR}: Draw a circle with a given radius centred at an assigned point.

2 Points {DrawCircle2P}: Draw a circle with a given diameter by assigning two opposite points on the circumference.

2 Points, Radius {DrawCircle2PR}: Draw a circle with two points on the circumference and with an assigned radius.

3 Points {DrawCircle3P}: Draw a circle assigning three points on the circumference.

Concentric {DrawCircleParallel}: Draw a circle concentric, with the same centre point, to an existing circle.

Circle Inscribed {DrawCircleInscribe}: Draw a circle inside an existing polygon of four sides or more.

Tangential 2 Circles, Radius {DrawCircleTan2}: Draw a circle tangential to two circles with a given radius.

Tangential, 2 Circles, 1 Point {DrawCircleTan2_1P}: Draw a circle tangential to two existing circles and assigning a centre point to establish the radius.

Tangential, 2 Points {DrawCircleTan2}: Draw a circle tangential to an existing circle and define the diameter and placement by assigning two points on the circumference.

Tangential, 2 Circles, Radius {DrawCircleTan2}: Draw a circle tangential to two existing circles with a given radius.

Tangential, 3 Circles {DrawCircleTan3}: Draw a circle tangential to three existing circles and/or lines.

Misc

MText {DrawMText}: Insert multi-line text into drawing at a specified base point. Optionally define font, text height, angle, width factor, alignment, angle, special symbols and character set.

Text {DrawText}: Insert single-line text into drawing at a specified base point. Optionally define font, text height, alignment, angle, special symbols and character set.

Hatch {DrawHatch}: Fill a closed entity (polygon, circle, polyline, etc) with a defined pattern or a solid fill. Optionally define scale and angle.

Insert Image {DrawImage}: Insert an image, bitmapped or vector, at a specified point. Optionally define angle, scale factor and DPI.

Points {DrawPoint}: Draw a point at the assigned coordinates.

QCAD Community Edition code source

Le code source de QCAD version 3.25.1 est publié sous les termes de la GNU General Public License version 3 (GPLv3). Veuillez noter que la GPLv3 s’applique uniquement au code source de QCAD 3.25.1, pas au code source des bibliothèques tierces ou d’autres ressources contenues dans le paquet (manuel utilisateur, polices, patrons, etc.). Pour une liste complète des licences, veuillez vous référer au fichier LICENSE.txt contenu dans le paquet.

Pour obtenir de l’aide et du soutien, veuillez consulter notre forum d’utilisateurs ou postez vos questions ici.

• QCAD code source : v3.25.1.0.zip
• License : GPLv3
• Version : 3.25.1
• git : https://github.com/qcad/qcad
• Exigences : Qt édition développeur (4.7, 4.8, 5.4, 5.5, 5.6, 5.7, 5.10, 5.11), C++ compilateur.

Ceci est code source destiné aux développeurs avertis en informatique. Le code source doit être compilé à l’aide d’un compilateur C++.
Ce n’est pas un installateur. Les installateurs sont disponibles en haut de cette page.

QCAD Community Edition Source Code

Il source code della versione QCAD 3.25.1 è rilasciato sotto i termini della versione 3 della GNU Licenza Pubblica Generale (GPLv3). Notare che la GPLv3 si applica solamente al source code di QCAD, e non al source code di librerie di terze parti o altre risorse contenute nel pacchetto (manuale utenti, font, modelli, etc.). Per una completa lista delle licenze, ci si può riferire al file LICENSE.txt contenuto nel pacchetto.

Per aiuto e supporto, vai sul nostro forum utenti o scrivi lì le tue domande.

• QCAD Source: v3.25.1.0.zip
• Licenza: GPLv3
• Versione: 3.25.1
• git: https://github.com/qcad/qcad
• Requisiti: Qt developer edition (4.7, 4.8, 5.4, 5.5, 5.6, 5.7, 5.10, 5.11), compilatore C++.

Questo è source code per programmatori esperti. Il source code deve essere elaborato usando un compilatore C++. Questo NON è un installatore. Gli installatori sono disponibili a inizio pagina.

QCAD Community Edition Source Code

The source code of QCAD version 3.25.1 is released under the terms of the GNU General Public License version 3 (GPLv3). Please note that the GPLv3 applies to the source code of QCAD 3.25.1 only, not to source code of 3rd party libraries or other resources contained in the package (user manual, fonts, patterns, etc.). For a complete list of licenses, please refer to the file LICENSE.txt contained in the package.

For help and support, please browse our user forum or post your questions there.

• QCAD Source: v3.25.1.0.zip
• License: GPLv3
• Version: 3.25.1
• git: https://github.com/qcad/qcad
• Requirements: Qt developer edition (4.7, 4.8, 5.4, 5.5, 5.6, 5.7, 5.10, 5.11), C++ compiler.

This is source code intended for computer savvy developers. Source code needs to be compiled using a C++ compiler. This is NOT an installer. Installers are available at the top of this page.

QCAD Professional version d’essai

Ces paquets contiennent QCAD, livré avec une version d’essai gratuite de QCAD Professional. L’essai dure 15 minutes à la fois et peut ensuite être redémarré. Vous pouvez commander QCAD Professional à partir de notre Boutique en ligne et télécharger la version complète immédiatement. Alternativement, vous pouvez choisir de supprimer la version d’évaluation et d’utiliser l’édition communautaire QCAD gratuite à la place.

Windows

macOS

Linux

Versione prova QCAD Professional

Questi pacchetti contengono QCAD, in bundle con una versione prova gratuita di QCAD Professional. La prova funziona 15 minuti alla volta e può essere in seguito riattivata. Puoi ordinare QCAD professional dal nostro Shop Online e scaricare la versione completa subito. Altrimenti, puoi rimuovere la versione prova e usare invece quella ridotta gratuita «QCAD Community Edition».

Windows

macOS

История

LibreCAD является форком свободной версии проекта QCad, разработчик которого уделяет внимание, в основном, собственническому варианту продукта. Разработка LibreCAD началась в 2010 году, как работа по созданию CAM для маршрутизатора ЧПУ, на основе QCad CE — свободной версии QCad, которая распространяется под лицензией

Но из-за того, что QCad CE использовал библиотеки Qt3 — устаревшую версию Qt, возникла настоятельная необходимость переноса на Qt4, что и было в первую очередь сделано. Затем планы расширились, и LibreCAD теперь имеет несколько особенностей, которые качественно отличают его от QCad, например лучшая поддержка кириллицы.

Первоначально проект назывался CADuntu, но это название многим не нравилось (в частности из-за того, что была похожа на название Ubuntu, к которому эта САПР не имеет никакого отношения, и звучало так, словно это специальный дистрибутив Linux для инженеров, на основе Ubuntu Linux). Поэтому в декабре 2010 CADuntu был переименован в LibreCAD.

Основными целями разработки LibreCAD был перевод программного кода QCad с устаревшей библиотеки Qt 3 на её современный вариант — Qt 4 и интеграции средств для экспорта данных в систему EMC2. В результате была проведена общая реструктуризация программного кода, выполнено портирование на Qt 4 и решено множество других проблем, неисправленных в QCad.

Первая стабильная версия LibreCAD вышла в декабре 2011. По заявлениям разработчиков, за счёт изменений в коде, скорость выполнения математических операций значительно увеличилась, также был сокращён и оптимизирован объём обрабатываемых данных. Реализована экспериментальная поддержка формата DWG. Добавлена поддержка автосохранения, улучшен интерфейс.

Создан программный интерфейс плагинов, через которые можно расширять функциональность LibreCAD. Разработана новая библиотека для работы с форматом DXF. Добавлена локализация интерфейса для 24 языков, появилась возможность использования utf-8 для слоев и имён блоков. Создан собственный формат шрифтов LFF, поскольку документация в QCad и используемые CXF-шрифты являются интеллектуальной собственностью компании, контролирующей разработку QCad. Создаётся документация.

Существуют пакеты для — и 64-разрядных ОС Linux (Ubuntu, Debian, Fedora, Mandriva, openSUSE), Haiku, Windows и Mac OS X.

Step 2: Print Preview

Choose File > Print Preview to switch to the print preview mode.

Adjusting the Scale

1. If the desired scale for printing is known (e.g. 1:2, 1:10, 2:1, 200:1, etc.), adjust the scale to the accurate, desired scale (2:1 in this example) .If the desired scale of your drawing is not known or irrelevant, click the button to adjust the drawing scale to the chosen paper .
2. Optionally, adjust the paper position using the tool Move Paper Position or use the button to center the drawing on the chosen paper(s) .
3. To print in black / white or gray scale, click the appropriate icon in the options toolbar:
4. Your drawing should be shown on a white paper as shown here:If your drawing is shown on a gray background, please check your paper and scaling settings again.If the purple rectangle crosses your drawing, please check the glue margins in the drawing preferences.
5. If you have chosen to print to multiple pages, the pages are shown beside / below each other:

Блоки

Блоком называют группу примитивов. Блоки можно размещать на чертеже произвольное количество раз с произвольными характеристиками — размер, цвет, местоположение, угол.

A Block is a group of entities. Blocks can be inserted into the same drawing more than once with different Attributes and at different locations and at a different scale and rotation angle (see image below) . Such an instance of a block is usually called an Insert. Inserts have attributes just like entities and layers. An Entity that is part of an Insert can have its own attributes or share the attributes of the Insert. Once created, Inserts are still linked to the Block they instantiate. The power of inserts is, that you can modify the Block once and all Inserts will be updated accordingly.

Помните:

Блок становится частью файла с чертежом в котором был создан и был сохранён.

Создание и сохранение блоков — удобный способ многократного использования обозначений, например окон и дверей на чертеже плана помещения.

Блоками можно оформлять полезную текстовую, табличную и справочную информацию.

Пример вставки блока

A — оригинальный блокB — блок повёрнут на 270o (по умолчанию поворачиваем против часовой стрелки), изменены толщина и цвет линийC — Блок уменьшен

Requirements

Any QCAD user can start developing new tools and features for QCAD immediately.

All that is needed is a text editor and basic ECMAScript (JavaScript) skills.

A Teigha license is not required. Teigha provides DXF / DWG file format export and import and is included with every regular QCAD Professional user license. If your script add-on or application relies on DXF / DWG format support through Teigha, the user(s) of your add-on will require a QCAD Professional single user, site or server license.

A Qt license is not required. The Qt libraries and the ECMAScript interface to the Qt libraries are included with every regular QCAD installation.

QCAD Community Edition Source Code

Il source code della versione QCAD 3.25.1 è rilasciato sotto i termini della versione 3 della GNU Licenza Pubblica Generale (GPLv3). Notare che la GPLv3 si applica solamente al source code di QCAD, e non al source code di librerie di terze parti o altre risorse contenute nel pacchetto (manuale utenti, font, modelli, etc.). Per una completa lista delle licenze, ci si può riferire al file LICENSE.txt contenuto nel pacchetto.

Per aiuto e supporto, vai sul nostro forum utenti o scrivi lì le tue domande.

• QCAD Source: v3.25.1.0.zip
• Licenza: GPLv3
• Versione: 3.25.1
• git: https://github.com/qcad/qcad
• Requisiti: Qt developer edition (4.7, 4.8, 5.4, 5.5, 5.6, 5.7, 5.10, 5.11), compilatore C++.

Questo è source code per programmatori esperti. Il source code deve essere elaborato usando un compilatore C++. Questo NON è un installatore. Gli installatori sono disponibili a inizio pagina.

Ordering and Updates

• How can I know if there is a new version of QCAD? Updates are announced in our forum at: QCAD User Forum You can check what version of QCAD you are currently using under menu Help > About QCAD (Windows, Linux) or QCAD Professional > About QCAD Professional (macOS). You can also check for updates using menu Help > Check for Updates…Update are alwo announced on and .
• How can I update to the latest QCAD release? / How can I download QCAD again if I lost the downloaded file? Please refer to our detailed instructions for downloading software and e-books from our web site.
• What is the difference between the QCAD User Reference Manual and the book «QCAD — An Introduction to Computer-Aided Design»? There are two primary sources of documentation for QCAD:
  • The QCAD User Reference Manual which is included with every installation of QCAD.
  • The book / e-book «QCAD — An Introduction to Computer-Aided Design».

  The user reference manual lists all available tools with brief usage instructions. The book / e-book is a complete introduction to QCAD and 2D CAD in general with many examples and step by step instructions, independent of the QCAD User Reference Manual. You can see a preview of the book on our web site.The book is available as printed book or e-book in PDF format in English, German, French and Italian.

• How does the EU tax system apply when purchasing from RibbonSoft? RibbonSoft GmbH is a Swiss company registered in the EU under the EU’s MOSS (Mini One Stop Shop) scheme. MOSS allows us to account for VAT (normally due in multiple EU countries) in just one EU country, in our case the Netherlands.For all purchases from outside the EU (e.g. US, Canada, Asia, Africa, Switzerland, Norway, etc.), no taxes are collected from our side. If your country charges taxes over such purchases, you are responsible for handling these. For purchases from companies with a valid EU VAT number who are located in EU countries other than the Netherlands, the EU VAT reverse-charge mechanism applies. We do not collect taxes on such purchases but have to report them to the tax administration as Intra-Community transactions (ICP). For purchases from private customers and companies without a valid VAT number, who are located in any EU country, the VAT rate of the country in which the customer is located is charged.For purchases from companies with a valid VAT number who are located in the Netherlands, the Dutch VAT is charged.