Table 6

Overview of design guidelines for the different constituent parts derived from experiments

Constituent partDesign guidelines
Integration of elements into polymer matrixRecess diameter is 0.4 mm wider tHan tde element
Undercut in design to conceal interfering z-seam
Recess depth is one layer height smaller than the element height
Lands for fixating an element should be narrow to avoid warping effects. Suitable for 1/2” elements are 1.5 mm and 2.5 mm for 1” elements
To ensure stable adhesion, printing of the lands should begin on the surrounding polymer instead of the inserted element
The imprinting of elements requires a flat surface, or suitable adapters should be used
Printed threadThread is orientated perpendicular to the printing direction
Including a 45° x 0.5 mm chamfer at the beginning of the thread enhances the insertion of the screw
Larger nozzle diameter requires for larger core hole diameter
Suitable core hole diameters for different thread dimensions are given in Tables 3 and 4 
Printed ball jointRecommended gap between ball and socket is 250 µm to prevent them from sticking together
Wider gaps increase the ball play in the socket

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