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Neck Gluing Question

#2
Big cauls and plenty of strong clamps. Relating from personal experience, on my first build I ended up with some hairline gaps in parts of the neck. Back then I didn't have a jointer, my clamps were weak, and I had a horrible clamping strategy, so my glue joints weren't perfect. =/ A jointer, some hefty parallel clamps, some cauls, and a better approach to clamp placement fixed that.
 
#3
In place of a jointer I use a 33" bar sander and some 80 grit stick-on paper.

I can pull off some pretty tight joints that way. Here is a pic of a 4 piece neck(cuban mah., purpleheart,purpleheart, cuban mah.)

4341170589_ffc3786a3a.jpg
 
#4
my build instructor stresses getting perfectly flat smooth gluing surfaces.

Even the best joiners/planers can leave small grooves/spaces in the wood surfaces depending on the wood type and grain orientaion. And mechanical sanders can cause small waves in the surface that will pervent perfect surface to surface contact

To assure perfect gluing surface he has taught me to put in time and elbow grease sanding the gluing surfaces to 120 grit using perfectly flat sanding blocks/surfaces. .

Cut your sanding blocks just a little wider then the surface you sill sand, and then run the block over the joiner to assure that it is flat.

You can also use adhesive spray (or buy sticky backed sandpaper) and put the paper down on a perfectly flat surface such as a metal table saw or joiner top. (you can use acetone or other cleaner to clean the glue of of your nice metal surface.)

I glue sand paper to a piece of marble when I want to sand my laminate pieces.

If you can feel grooves, pits, or other deviations from the flat guing surface then no mater how well you clamp the peices, glue will get trapped inside the lam to be revealed when you cut into it.

You do not want to squeeze all of the glue out of the joint, but you do want good fiber to fiber contact throught the entier joint.
 
#9
mikeyswood said:
I think that could be pretty cool if Cy is taking classes. His opinion could offer a new perspective.
Click to expand...

yes, a friend of mine teaches guitar building at the local comunity colege, and 'build instructor' is a little easier to type out then "guitar build teacher"...

I've also been helping out in his classes since some of the students don't even have wood working experience, so I help answer easy questions while he is busy.

I am not quite sure what perspective that gives you, but if it helps.
 

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