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Shaping the small metal plate I use in this introduction to FreeCAD worked well on the RPi2. Now it is time to call FreeCAD from the application menu under Graphics. After a reboot, FreeCAD should work fluidly.įigure 2: Activating hardware acceleration in raspi-config. Consequently, you need to specify something like 192, for 192MB of graphics memory, under Advanced Options | Memory Split. This small amount of graphics memory results in image artifacts when the FreeCAD zoom function is used. In the standard settings, the chip has just 64MB. As is known from official announcements, it is not possible to overclock the RPi3.Ĭoncurrently, you should increase the working memory allocated to the graphics chip.
When I later enabled overclocking on my RPi2, it resulted in a black display screen. The corresponding sections in the /boot/config.txt are automatically commented out by the routine. The system proceeds cautiously when activating OpenGL support, turning off existing settings for overclocking. Moreover, if you activate this setting on a Pi2 or Pi3 and then insert the SD card into a first-generation Rasp Pi or even a Pi Zero, the computer will refuse to start. These are the only two versions of the computer possessing the necessary space. When performing this operation, you should note that the function only works with the Raspberry Pi 2 or 3 (RPi2/RPi3).
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Hardware acceleration is activated in the computer settings, so you should invoke sudo raspi-config and turn on the GL Driver option in Advanced Options ( Figure 2).
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$ sudo apt-get install freecad freecad-docįreeCAD does not run smoothly on the Rasp Pi, even after installation of the OpenGL drivers, because additional configuration is needed.
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If possible, FreeCAD should be installed simultaneously with the OpenGL drivers on Raspbian (see also the "Activating OpenGL" box): $ sudo apt-get install xcompmgr libgl1-mesa-dri However, you can skip this step when starting out on a freshly installed Raspbian without any special settings. If necessary, you should make an image of the current installation. The Raspberry Pi Foundation recommends securing the current system on the Rasp Pi before installing the OpenGL drivers since these are still experimental.
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To perform your own tests, you should therefore bring the system installed on your Rasp Pi up to date and then reboot: $ sudo apt-get update
However, the OpenGL support recently introduced in Raspbian lets FreeCAD work sufficiently fast to complete smaller projects on the Rasp Pi. Putting a CAD program on the Rasp Pi might seem like a futile endeavor because of the unexciting computing power of the Raspberry Pi CPU and GPU. If you don't have a standard-sized computer, you can perform CAD tasks by equipping the Raspberry Pi with FreeCAD. The documentation is very detailed, and it comes with illustrations, so after about 15 minutes, you should be able to complete your first project from a simple metal plate ( Figure 1).įigure 1: Starting out in FreeCAD with a small metal plate. A number of video tutorials on YouTube can help you familiarize yourself with FreeCAD, and the FreeCAD website directs you to a number of offsite tutorial providers.
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This program runs on Linux, Mac OS X, and Windows, and a portable release even works on a Windows system with restricted rights. When it came time to test FreeCAD, things clicked right away. During the course of my research, I tested a number of CAD applications on various systems, including AutoSketch, Blender, 3DScratch, Tinkercad, and others however, I couldn't get excited about any of these programs. For the practice test described in this article, I developed a case for the Raspberry Pi with a display, and I had a 3D printing provider print the design.īefore embarking on the test, I had professional experience with 2D CAD programs and only rudimentary exposure to 3D CAD, dating back to my days as a mechanical engineering student in the early 1990s. In today's world, a Raspberry Pi and the open source software FreeCAD are all you need. In the not-too-distant past, 3D modeling applications required powerful workstations and expensive programs.
To model and produce 3D objects, you need a 3D printer and, most importantly, a 3D CAD (computer-aided design) program, which lets you construct an object down to the last detail.
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