Printed Circuit Board Assembly & PCB Design SMT Electronics Assembly Manufacturing Forum

Printed Circuit Board Assembly & PCB Design Forum

SMT electronics assembly manufacturing forum.


Soldering stranded wires to FR4 pcb

Howard Eccles

#13784

Soldering stranded wires to FR4 pcb | 16 October, 1998

With current soldering of stranded wires to pcb assy's the wire tends to be very brittle and can break with very little movement of the wire. We use a low residue cored wire. Anybody with advice or who has seen a similar problem/knows how to overcome this - please respond.

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Jeff Sanchez

#13785

Re: Soldering stranded wires to FR4 pcb | 16 October, 1998

| With current soldering of stranded wires to pcb assy's the wire tends to be very brittle and can break with very little movement of the wire. We use a low residue cored wire. Anybody with advice or who has seen a similar problem/knows how to overcome this - please respond. | Howard, Can you give us more info on what your process is and exactly what type of wire you are using? Are you thermal striping or using blade strippers? Are you pre tinning the wire? Are you fluxing the wire before you put it in the board? Are you using pre tinned copper wire from the manufacturer or just bare copper ? Last but not least, How many strands to the gauge is your wire? These are a few small factors that lead up to big problems that we have all faced at one time. Fear not, It's an easy fix! See ya in a few..........Jeff Sanchez

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Scott McKee

#13786

Re: Soldering stranded wires to FR4 pcb | 16 October, 1998

| | With current soldering of stranded wires to pcb assy's the wire tends to be very brittle and can break with very little movement of the wire. We use a low residue cored wire. Anybody with advice or who has seen a similar problem/knows how to overcome this - please respond. | | | Howard, | Can you give us more info on what your process is and exactly what type of wire you are using? Are you thermal striping or using blade strippers? Are you pre tinning the wire? Are you fluxing the wire before you put it in the board? Are you using pre tinned copper wire from the manufacturer or just bare copper ? Last but not least, How many strands to the gauge is your wire? | These are a few small factors that lead up to big problems that we have all faced at one time. Fear not, It's an easy fix! See ya in a few..........Jeff Sanchez | And what process are you using to do the soldering? I have a customer who's main business is soldering wire to pcbs (which I build). They scrapped the hot bar method and moved to selective flow soldering with great success...

Keep us posted.... Scott

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