On Tuesday the 7th we went to metaallokaal, a metal workshop, to play around with some MIG welders and to get additional information on the welding process. Jeroen, the owner of metaallokaal, gave us some advice on which settings to use. During the instruction our group had a collective eureka moment when Jeroen demonstrated a “wrong” setting for the MIG welder. The feed rate and the power setting were both too low to weld on to the thick plate.
Today we’re going to tell you about our decision for our 3D printer system. The printer built by the Michigan University used a delta system, quite a well-known system for polymer 3D printers. We however, argue that a Cartesian system would be much better suited for our metal printing application. The reason for this is that the main advantages of a delta system, less materials required and a lower weight, implicate a major disadvantage for any MIG welder based metal 3D printer.
We’ve been looking at one of the core components of our metal 3D printer, the MIG welding machine. In our case, the welding machine is a Kemppi 2500 MIG welder. Since we want to be able to control power and feed rate, we needed to know if and how we could digitally control the main settings of the welding machine. As it turns out, the feed rate can easily be digitally controlled, but the power requires a small servo on the current switch, since this would be easier and require less alterations to the existing welding machine. Tomorrow we will not only continue our work on the welding machine, we will also tie the knot on the open-source 3D polymer printer we’ll base our design upon. We will keep you posted!
Hello dear followers,
We’ve started a 3D metal printer project, and we hope you will be as enthusiastic as we are! In the upcoming 5 weeks we will guide you through the process of designing, building and developing an open source metal 3D printer. We aim for a printer that is accessible to a wide amount of people, while still producing good prints. The project started out by analysing our source of inspiration, the Open-source metal 3-D printer by the Michigan Technological University. Throughout the project we will publish our results wrapping things up with a post on recommendations to guide others.