To reduce the build volume, the chassis-boiler-cabin section will collapse in on itself in a telescoping fashion and the roof will be on a slider so it can fully extend after printing. This requires a significant amount of CAD modifications.
This complex design requires careful consideration with respect to tolerances so that all parts can move freely during assembly while maintaining strength after assembly. Several test prints are required to realize the capabilities of the printer and validate the design. A copy of the finished CAD model is created to be cut up for testing. The tests will be printed using the final print settings as listed in table 1.