Abalone rosette measurements

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Richardl
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Joined: Sat Oct 27, 2007 4:09 pm
Location: NZ (Palmerston North)

Abalone rosette measurements

Post by Richardl » Sun Apr 05, 2020 3:27 pm

Hi Trevor - several pages are dedicated to abalone rosettes so thought I'd try that on the latest build. The rosette former seems a cunning way to assemble the rosette so I was just about to make one but don't really follow the measurements in the book (6.4.1.1). On a steel string with a 102 mm sound hole (in the plan), and 4 mm between soundhole, inner purfling then 4 mm to the inner shell rosette, I make it 121 mm diameter for the rosette former. I'm not sure how the the recommended 115 mm former (or 16-18 mm bigger than the soundhole diameter, elsewhere) will work unless the soundhole is a bit smaller or I use less than 4 mm between rings. Might be petty, but just checking I'm not doing something stupid by aiming for a 121 mm former.
Cheers
Richard

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Trevor Gore
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Re: Abalone rosette measurements

Post by Trevor Gore » Mon Apr 06, 2020 8:49 pm

Richardl wrote:
Sun Apr 05, 2020 3:27 pm
On a steel string with a 102 mm sound hole (in the plan)...
The falcate plan has a 95mm sound hole, which is what I had in mind when suggesting "something around 115mm".

Your 121mm former should be OK for a 102mm sound hole, but best to get a compass and a piece of paper and draw it out to make sure it pleases your eye.

Richardl
Blackwood
Posts: 112
Joined: Sat Oct 27, 2007 4:09 pm
Location: NZ (Palmerston North)

Re: Abalone rosette measurements

Post by Richardl » Wed Apr 08, 2020 5:11 pm

OK thanks. Its appears a bit big to me, which is why I asked. Perhaps I'll cut down the gaps from 4 mm to 3 mm to get the rosette a bit tighter, although that'll make little difference in the scheme of things. Cheers
Richard

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