3D Printer Technology designed the DAF3D to be adaptable both in function and form. We have used several disposable sub-assemblies that effectively make the DAF3D a modular device that can be upgraded to improve functionality and capacity.
Most machines here on Earth can be serviced reasonably easily but, with the mission critical nature of the DAF3D, there is simply no room for temperamental componentry. The device must remain in full, reliable service for the entire duration of the mission in which it is deployed.
The DAF3D aboard the ISS has continued to operate at full capacity without incident for 3 years.