Flsun QQ

The Flsun QQ is an FDM 3D printer from Flsun with a 260 x 260 x 370 mm build volume.

Calibration

• Start with a full mechanical inspection before any software tuning.

Action: Power off the printer, then inspect the three delta towers, carriages, belts, effector arm joints, hotend wiring, fan shrouds, and the bed surface. Check that each belt is equally tensioned by plucking lightly and listening for roughly similar pitch across all three towers. Move the effector by hand only with the machine unpowered and verify there is no grinding, binding, or asymmetric drag.

Common defects

• Potential uncertainty around model-family documentation: The supplied sources are stronger for the QQ-S and QQ-S Pro than for the exact original Flsun QQ variant, so some specifications must be inferred from the QQ family rather than asserted as model-unique facts .

Symptoms: Confusion about exact build volume, probe design, or electronics revisions; conflicting community posts and reseller listings.