Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length.

[rich_morris]

Hi,


It's a bit late now, as I've already bonded frames, keel and s couple stringers, but...


How necessary is it to remove/sand back to clean wood the laser  cutcut edges of ply wood?






So far I've only given them a quick rub with glass paper to remove any loose dust, and rough spots where the parts remained attached to the blank.


Rich

[Martin (Admin)]

 
"a quick rub with glass paper"

Yeah, that's what I do.
You have to be careful, as the kits are cut exactly to size so and sanding will make for a sloppy fit. 

[Barry]

Try wiping/rubbing the blacken edges with  methylated spirits.

[JimG]

The amount of cleaning depends on whether they have used too much laser power or not. Good cutting leaves the edges a light brown colour needing only a light clean. Too much power leaves the edges blackened and needs more sanding to remove the charred wood. Leaving the char on reduces the strength of a glue join as the glue cannot soak into the wood so the bond is purely on the surface.
Jim

[rich_morris]

"a quick rub with glass paper"

Yeah, that's what I do.
You have to be careful, as the kits are cut exactly to size so and sanding will make for a sloppy fit. 

Thanks, I'll keep doing that then. Or at least my son will keep doing that!

[rich_morris]

Try wiping/rubbing the blacken edges with  methylated spirits.

Thanks, I'll give that a try.

[rich_morris]

The amount of cleaning depends on whether they have used too much laser power or not. Good cutting leaves the edges a light brown colour needing only a light clean. Too much power leaves the edges blackened and needs more sanding to remove the charred wood. Leaving the char on reduces the strength of a glue join as the glue cannot soak into the wood so the bond is purely on the surface.
Jim

The edges don't seem too badly burnt. Certainly the brown doesn't rub off easily, even with sandpaper.
Edges are brown rather than black.
I'll keep giving them a light clean, unless they look overly burnt.
Thanks
Rich