Wire Soldering Issue

[jimmykk]

Hi
I encountered a soldering problem while soldering 2 wires to my PCB.
The hole on the top is for GND and the below one is for Power.

The wire is not getting properly soldered in the Ground Hole, while not much of a problem on the Power Hole.
The heat from the ground hole is getting spread over whole board and also, wire's insulation is melting.
To be honest, i was expecting the opposite. As the Ground hole has orthogonal connection which i assumed is
better for such type of soldering. Rather than Full Contact of Hole with surrounding Copper as in Power Hole.

 

[barry]

Use flux. Use a hotter iron.

 

[PCBFAE]

Hi
I encountered a soldering problem while soldering 2 wires to my PCB.
The hole on the top is for GND and the below one is for Power.
View attachment 182970
The wire is not getting properly soldered in the Ground Hole, while not much of a problem on the Power Hole.
The heat from the ground hole is getting spread over whole board and also, wire's insulation is melting.
To be honest, i was expecting the opposite. As the Ground hole has orthogonal connection which i assumed is
better for such type of soldering. Rather than Full Contact of Hole with surrounding Copper as in Power Hole.

Hi，
it can be a problem in the Plated through holes .
the holes can be polluted or covered by solder resist partially during PCB production, which will cause poor solderability and connection with the wire after soldering.


Louis

 

[D.A.(Tony)Stewart]

That's a simple Thermodynamics issue with a larger ground plane to heat up.

- more Flux and heat with a properly cleaned tip. The PCB must not be oxidized from daily exposure. If so light pre-cleaning with abrasive pads. If still stubborn, pre-tin the pads with solder. If still a problem , show us a photo of your soldering tip.