Homebrew PCBs

This weekend I played around with my hot air welder again, trying 
to get better  practice. I bought three types or welding rod, and 
small and large triangle type and a 3 mm round, each type comes 
in 50 rods per pack. I found triangle is the best. For 4.5mm 
sheet I use the larger triangle, for 3 mm sheet I use the small 
triangle rods. Practice on lots of scrap pieces and then try and 
break the weld when cooled. A *really* good weld will not break 
at the weld, but rather the sheet its self will break. The trick 
is to get the right temperature setting and nozzle distance from 
the work piece. There is a fine line between burning the plastic 
and not heating it enough to properly fuse. If the temperature is 
too low then it takes too long to melt the plastic and so too 
much heat transfers to the bulk of the material, which makes 
everything deform and then you cannot push hard of the rod. If 
the heat is too hot then it very easy to burns the plastic which 
contaminates it with carbon and produces a weak weld.

Adam

roel_cnc wrote:
> Hi,
> 
> info to Adam and Markus :)
> Buy me new wire and sheet pvc today.!
> pitty is wire gose only per 2 kilo's
> 
> Its fantastic and strong (AWESOME)
>  
> 
> 
> 
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