The poor quality of bridging is because the extruded filament is not smoothly bridged. The common causes and corresponding solutions are as follows:
1. The bridge distance is too long - Enable support.
2. The bridge speed is too high and the bridge flow is too low, causing the bridge to be pulled off - adjust the bridge speed down appropriately or (and) enable the ‘Thick bridges’.
3. The bridge speed is low and the bridge flow is high, causing the bridge to sag - appropriately increase the bridge speed or (and) reduce the bridge flow.
4. Insufficient cooling of the bridging filament - properly reduces the nozzle temperature and increases the speed percentage of the Auxiliary Part Cooling Fan and Cooling Fan for Hotend to accelerate cooling.