Iintroduction

We have observed in the build of GVCS machines that a 3D scale model can assist one greatly in terms of prototyping. The reasons are 3-fold.

A scale model allows for several features to be tested which are not possible to see in a 3D model:

Interference - while a 3D model can be drawn successfully, it may to always be possible to build it in real life because of unforeseen parts interferences. This may occur with respect to structural members or smaller parts, such as insertability of bolts. Ex. Interference prior to assembly - a bolt can fit in its final position, but you can't tell if it is insertable, or a nut is insertable, in the first place.
Tooling Fit - CAD will not reveal whether it is possible to fit a wrench or other tool to access a specific fabrication operation. Example: you can't get a wrench in to tighten a bolt.
Asssembly Order - CAD programs can't suggest an assembly order - as CAD will allow you to assemble something without it being possible in physical reality. Example: a 2-piece barbell with shaft through a hole can be assembled only if the 2 halves are put through the hole and then connected
Motion - If there are joints, one requires a physics engine to determine motion. This motion can be tested in a scale model.

A scale model assembly can be used to generate instructional videos that can be applied towards a real build.

These models may be obtained by 3D printing or laser cutting. See Laser Cut Scale Model of Brick Press Frame:

OSE Rapid Prototyping