Adding Structure - Printing in Plastic: Build Your Own 3D Printer - page 205

Figure 12-15. Parts A and B have their Table Bearing Supports secured.
Attach Lower Structural Sides
Now it's time to attach Parts A and B to the larger sub-assembly that you put together in Chapter 11.
Figure 12-16 shows Part A (or B; you want the Table Bearing Support facing inwards) placed against the
Upper Structural Side and four machine screws ready to be inserted. (Note the orientation of the Z-Axis
rail; it's on top and the “arms” of the Lower Structural Sides are pointing down towards the tabletop.)