Saturday, May 9, 2009

Top is on, Moving forward


Qestion to all - for some reason, when I upload pictures, on some of them you can click and it will zoom in, and on others it doesn't work.  Obviously this is some sort of software quirk but if anyone knows how to avoid it, please let me know.

No, it's not that I haven't been building, it's that I haven't been writing.  I have been a bit busier at work lately so that has slowed things down.   If all goes well, this instrument should be ready in about a month.

The Top is on and is holding it's dome wonderfully !! 



You can see in the picture above, I've got a 25' radius template in front of a steel ruler.  The top is holding the dome very well and I'm hoping that this will fix the issues I've had with the tops collapsing on to the internal bracing - I guess we'll see.

In the picture below, you can see the trim piece that sits below the пів тони or half tone (the black keys).  The thing I didn't think of when I was designing this is that with the top domed, the "nut" end of the strings (the top) would be sitting on a spherical surface, not a flat one.  To fix this, I sanded the domed profile into this trim piece to bring the half tone strings back into level.  The 25' sanding dome worked perfectly for this.  If you look carefully you can see how the trim piece gets thinner at the center and thicker at the ends.  The wood is East Indian Rosewood although it looks much redder than typical EIR.  I bought it off of E-bay so who knows?



In this next picture you can see a test piece I made to check out the bridge fit to the top.  The test piece isn't perfect but I've made changes that will fix that and should yield a perfect fit.



Now here's a pic of the actual bridge blank of EIR pre shaping - notice the gaps.  The final height will be much lower but I wanted extra material in case I made mistakes EIR is rather expensive.



Well, that's all for today folks.  I promise to write more often in the future