Supports

Theory

Supports are generated by the slicer to print geometry that would otherwise collapse. They contact the model at a small interface distance (typically 0.2-0.3 mm). Types include normal supports (buildplate-only or everywhere), tree supports (branching structures minimising contact), and soluble interface materials (PVA, BVOH) for dual-extrusion printers.

Application

Use tree supports for organic shapes: minimal contact, easy removal. Set 2-3 support interface layers with reduced density. Soluble supports produce the best undersurface quality. Manually place supports using slicer paint-on-support tools. Orient parts to minimise support volume as the first design priority.

Common mistakes

Supports touching vertical walls leave witness marks. Default grid supports are notoriously difficult to remove from interior cavities: prefer tree supports. Excessive support settings inflate print time and cost. Removing supports from brittle resin prints in deep holes can crack the part: design self-supporting features instead.

Related terms: Overhang, Bridging, Resin Layer Cure