There are several reasons for the bridges that appear to be bridged:
2.Short distance between adjacent wires or pads.
3.The base metal surface is not clean.
4.Solder alloy is not pure enough.
5.Flux activity and preheating temperature.
6.PCB electrical installation design is unreasonable.
8.Height of component pin protruding PCB
9.PCB clamping speed.
10.PCB clamping Angle.
Bridge and short circuit solutions:
1.Adjust the temperature appropriately.
2. Change wire or pad spacing design.
3.Clean metal welding surfaces.
4.Tinning, or adding pure tin, to improve the solder purity.
5.Replace active flux.
6.Change PCB electrical installation design, uniform surface heat capacity.
7.Adjust the peak depth.
8.The machining thickness of component pin is 1.5-3mm higher than that of PCB
9.Adjust clamping speed and clamping Angle.Pinch Angle.3 to 7 °