The ultra simple and affordable RepStrap in any dimensions. When I decided to build myself a RepRap early in 2013 I wanted to purchase just the electronics and bearings from the internet, while sourcing all other parts from local stores. 3D-printed RepRap components don’t belong to this category and I wanted to avoid the experience of purchasing parts with poor quality. Eventually I came up with a design that had me wondering if printing parts for a RepRap is ever interesting, except maybe to help someone who needs spare parts for his existing 3D printer. QuadRap requires only the following skills to construct: cutting with a saw and drilling! This opens up the potential for many more people to get into 3D printing and learn to solve problems they’ve never encountered. Schools can raise the level of education as students start dealing with the electronics, firmware, and using 3D design software.
The frame is made from standard aluminium square tubes. This is where the “Quad” part of the name comes from. These tubes are sold in various lengths, and their length is the only limit to the size of printer you can build. Most aluminum tubes are one meter long. In my testing, I found the 20x20mm size sufficiently rigid for this length. For a portable printer that can fit through a door it’s most economical to make it a half meter in each dimension. For a desktop version, 33cm in each direction is most economical.
A QuadRap with a printable area of 32x32cm can be built today for about 250€ (US$340). Let us see how the QuadRap accomplishes its simplicity and reliability.
You can find a detailed history of QuadRap’s evolution at quadrap-3d-printer.blogspot.de