Was just searching for differences in stiffness for a CNC constructed with birch vs.

General CNC CNC Routers
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Was just searching for differences in stiffness for a CNC constructed with birch vs. one constructed with aluminium.

Found this on Wikipedia and there’s quite a difference actually.

Going to steel is a whole different ballgame of course.
http://www.google.dk/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0CCIQFjAA&url=http%3A%2F%2Fen.wikipedia.org%2Fwiki%2FSpecific_modulus&ei=hxa9U9yPFITqywOq8IHoAw&usg=AFQjCNF-r6gvsE8guqZWjaW1tVXU3dmnPw&sig2=2OwMMDFk9KfiGN560TVjuw&bvm=bv.70138588,d.bGQ&cad=rjt

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Hello i think about contruct in wood its more dangerous about have dilations with humity and weather changes, so i prefer build in steel or aluminium structural its more strong… There are many strude bars to choose! Regards from Spain Eugenio

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Any wooden part, witch is also a item of dimensional strict part of the CNC, should be ancapsulated in a damp tight layer, epoxy or alike.

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I agree with you! :slight_smile:

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Not much is gained from constructing in wood, except is much easier to do with normal tools. But then Again, cuttng and drillig alu is almost as easy as wood with the right cutters.

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@Peter_Fouche1 I wasn’t aware of the possibility of using a handheld router to slot aluminum, good info there, thanks.