Category Archives: CAD

New robot project

This is a new long-term robot project I have been working on for the past couple of months. It is a general purpose indoor robot, that will work as a platform for experimentation. When designing this robot, I have tried to think about and improve everything I have learned from previous robot projects I have made. But this robot will also feature some new stuff I have not tried before. Some of the key features if the robot includes:

  • Stepper motor based four-wheel-drive skid-steering drive system
  • Big Li-Ion battery
  • A lot of custom 3D printed parts
  • Heavy duty bumpers, large ground clearance and large foam wheels
  • Raspberry Pi main computer
  • Arduino Due for controlling low-level peripherals
  • Scanning Lidar sensor
  • Probably a Raspberry Pi camera module mounted on a pan/tilt system

So far, only the majority of the mechanical work is done. Here are a few images, click on them to make them larger:

DIY 3D printer detailed overview

This video is a detailed overview of my DIY coreXY 3D printer. It is just over a year since I built it. Some things have changed since then, but most of the machine it the same. This is my first and only 3D printer, I use a few times a week, sometimes more often than that. The printer works very well, it produces high-quality parts while requiring very little maintenance.

Link to 3D printer page: DIY 3D printer

3D printing a fidget spinner

This video shows the process of 3D printing and assembling a fidget spinner. I have designed the spinner using Autodesk Inventor. The spinner is slightly asymmetric, making it easy and comfortable to start it. I use a ceramic ball bearing in the centre and normal bearings as weights. I always use Cura to slice my parts before 3D printing. To print in different colors, I manually edit the generated G-code file using Notepad++. Cura automaticly puts a comment in the G-code file at the start of each new layer. I use the search function to find a specific layer and insert a couple commands to lower the printbed and pause the machine so I can change the filament.

The STL files for the spinner is available on Thingiverse here.

DIY FPV goggles

When I wanted to get into FPV a couple of moths ago I bought the Eachine EV800 FPV goggles with built in VTX and battery. I liked the idea that they could be used as goggles, and also as a screen. However, when that arrived I realised that they were very uncomfortable to wear, and I was not able to wear my normal glasses under them as I had intended. Therefore I only used the screen to start with.

I was not completely happy with the screen experience, I still wanted to have googles. Therefore I started to design my own goggle-part. I started with making a four part assembly in SketchUp to snap into the existing mount on the EV800, and also to hold the fresnel-lense in place. I 3D printed the parts, glued them together, and they fit perfectly. Since the shape of the rest of the goggles is very complicated, I thought it would be very time-consuming to design and 3D print everything. Therefore I built the rest of the goggles using cardboard, paper and hot glue. To make it look better and be more comfortable to wear I covered the entire thing in fabric, using more hot glue. I kept the part touching the face as large as possible to make them fit over my glasses. I finished off the design with some 3D printed parts to mount the original head strap from the EV800. I am pretty satisfied with the result. Now the goggles are comfortable, fits over my glasses, and is comfortable to wear. And I can still remove the screen from the goggles is I want.

All STL files for 3D printing are available for download here: DIY_FPV_goggles.zip

1200_DSC_7036

Click “Continue reading” for more images.

Continue reading

3D printed quadcopter and hexacopter avalible for download

I have continued to work on my 3D printed quadcopter. Now I have also created a new baseplate for a hexacopter. It is still using the same wooden arms, motor mounts and landing gears. I have also created a few extra pieces that I needed, mostly mounts for different antennas.

I will probably add more pieces in the future. Please comment if you have any ideas for what I should add or change.

Click the link below to download the STL files for all the pieces I have made so far.

Download modular 3D printed quadcopter/hexacopter

1200quadAndHex

3D printed quadcopter

This is a 3D printed quadcopter that I have made. The design is not entirely 3D printed, it uses 15×15 mm wooden spars as motor booms. My idea was to create a modular system to build quadcopters (and maybe other multirotors) using 3D printed parts. I want multicopters that are fast and easy to assemble, modify and upgrade. I also want them to be cheep in material cost, therefore I have tried to keep the weight as low as possible. Right now, one quadcopter frame is slightly below 100grams of plastic.

Right now I have 3D printed motor mounts, landing gears and a center piece as well as a top plate for mounting the battery and all the necessary spacers. The size of the quadcopter is determined by the length of the wood pieces. The quad in the images is a 250 size. I am using wood instead of 3D printed arms it to keep the weight down, I also think it is stronger.

I will continue to experiment with this 3D printed multirotor building system, and hopefully make all the STL-files available for download in the future.

1200_DSC_6759

1200_DSC_6766

1200_DSC_6769