Bridging in 3D Printing: Settings That Help

Bridging is when the printer lays plastic across empty space with nothing underneath. Done well, it saves you from using supports.

Why bridges sag

Plastic leaves the nozzle hot and soft. Over a gap, it can droop before it cools, especially on long spans.

Settings that help

• Run the part cooling fan at full speed on bridges.
• Slow the bridge speed so the plastic stretches less.
• Lower the nozzle temperature a little.
• Reduce the bridge flow slightly if lines look overfilled.
• Use a thicker bridge layer if your slicer offers one.

Design tips

Keep bridges short, add a small support under long spans, or change the orientation so the span is shorter.

Test it

Print a bridging test model and change one setting at a time.

This is general guidance. Always follow your printer manufacturer's instructions.

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