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PostPosted: Sun Jul 25, 2021 10:10 am 
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Brazilian Rosewood
Brazilian Rosewood
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Joined: Wed Feb 20, 2008 9:12 pm
Posts: 6977
First name: Mike
Last Name: O'Melia
City: Huntsville
State: Alabama
Focus: Build
Status: Semi-pro
For tops (arch) etc. what do u use? Is the an electronic tool?


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PostPosted: Sun Jul 25, 2021 10:20 am 
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Contributing Member
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Joined: Fri Jul 10, 2009 4:44 am
Posts: 5398
First name: colin
Last Name: north
Country: Scotland.
Focus: Build
Status: Semi-pro
Mike OMelia wrote:
For tops (arch) etc. what do u use? Is the an electronic tool?

Only really for closed boxes I believe.
All here - https://theartoflutherie.com/calipers/

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The name catgut is confusing. There are two explanations for the mix up.

Catgut is an abbreviation of the word cattle gut. Gut strings are made from sheep or goat intestines, in the past even from horse, mule or donkey intestines.

Otherwise it could be from the word kitgut or kitstring. Kit meant fiddle, not kitten.



These users thanked the author Colin North for the post: Chris Pile (Sun Jul 25, 2021 10:56 am)
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PostPosted: Sun Jul 25, 2021 10:56 am 
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Contributing Member
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Joined: Sun Mar 06, 2011 12:04 am
Posts: 5743
First name: Chris
Last Name: Pile
City: Wichita
State: Kansas
Country: Good old US of A
Focus: Repair
Status: Professional
^^^ Good article! ^^^

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"Act your age, not your shoe size" - Prince


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PostPosted: Sun Jul 25, 2021 11:45 am 
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Cocobolo
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Joined: Sun Oct 09, 2016 12:18 pm
Posts: 383
Location: Somerset UK
State: West Somerset
Country: UK
Focus: Build
Status: Amateur
For ordinary flat tops I use a dial indicator in a shop made wooden frame deep enough to reach the centre of the top.

Dave


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PostPosted: Sun Jul 25, 2021 6:09 pm 
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Koa
Koa

Joined: Sat Mar 09, 2019 4:50 pm
Posts: 1092
Location: Goodrich, MI
First name: Ken
Last Name: Nagy
City: Goodrich
State: MI
Focus: Build
Status: Amateur
I made this one for violins, and it worked for my arch top. The .01mm readings is overkill, but it was $30 or something on sale. Why not? I like the dial, because you can watch trends by how fast it moves, and see places that are going the wrong direction very easily. Far easier than a digital.

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PostPosted: Mon Jul 26, 2021 10:48 am 
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Brazilian Rosewood
Brazilian Rosewood

Joined: Sat Jan 15, 2005 12:50 pm
Posts: 3867
Location: United States
I carve the outside arch first, so the inside surface is flat, and this allows me to use my regular 'cello thickness gauge to measure the height as I'm carving. If the plate has already been hollowed out just put it on a sheet of glass and subtract that thickness. I actually rough the arches first using a Wagner planer in the drill press to define contours, (a little high) to remove most of the waste, and then carve down to those. I've seen some clever setups using things like laser levels, and even Roncci ruled transparencies to project lines onto the surface to produce moire patterns that show the contours, but for every day shop use a thickness gauge is fine.


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