Guest Jecklin Posted January 7, 2017 Posted January 7, 2017 Hello all, Does anyone know a method for determining the radius of a fingerboard short of buying a variety of radius blocks and seeing which one fits? My Yamaha RBX260f needs a little work and I can't find the radius on Yamaha website etc. If anyone knows the radius Yamaha used that would be great. Cheers Thomas Quote
franzbassist Posted January 7, 2017 Posted January 7, 2017 (edited) An easy way is to download and print out some radius guides. The Jerzy Drozd setup [url="http://www.jerzydrozdbasses.com/akcndfr54jdhrei567/Ultimate_Guide_ver100.pdf"]guide[/url] has some in the appendices. Just make sure you print them out accurately. EDIT: Just found it, it's [url="http://download.yamaha.com/api/asset/file/?language=en&site=usa.yamaha.com&asset_id=35868"]10 degrees[/url] Edited January 7, 2017 by walbassist Quote
Dan_Q Posted January 7, 2017 Posted January 7, 2017 Yep there is the print out way which is by far the cheapest way if you have the kit 👍 If you'd prefer to get a tool though, I picked up a small steel rule with popular rad sizes punched out of the straight edges for only a few pounds off eBay. Quote
essexbasscat Posted January 7, 2017 Posted January 7, 2017 A set of radius gauges is available for around £11.00, worth the cost as a set up tool Quote
Guest Jecklin Posted January 7, 2017 Posted January 7, 2017 [quote name='walbassist' timestamp='1483802531' post='3210241'] EDIT: Just found it, it's [url="http://download.yamaha.com/api/asset/file/?language=en&site=usa.yamaha.com&asset_id=35868"]10 degrees[/url] [/quote] Thank you Walbassist,that's one of the pages I didn't bother looking at in my hunt earlier Cheers Thomas Quote
BigRedX Posted January 9, 2017 Posted January 9, 2017 [quote name='walbassist' timestamp='1483802531' post='3210241'] An easy way is to download and print out some radius guides. The Jerzy Drozd setup [url="http://www.jerzydrozdbasses.com/akcndfr54jdhrei567/Ultimate_Guide_ver100.pdf"]guide[/url] has some in the appendices. Just make sure you print them out accurately. EDIT: Just found it, it's [url="http://download.yamaha.com/api/asset/file/?language=en&site=usa.yamaha.com&asset_id=35868"]10 degrees[/url] [/quote] How can you guarantee that your print out is accurate though? IME all consumer level printers are between 1 and 2% off when it comes to linear accuracy. Quote
franzbassist Posted January 9, 2017 Posted January 9, 2017 [quote name='BigRedX' timestamp='1483962603' post='3211385'] How can you guarantee that your print out is accurate though? IME all consumer level printers are between 1 and 2% off when it comes to linear accuracy. [/quote] There's a scale on the page, so you adjust print size until it matches that. I just printed the page on my printer at work and it was a perfect match. Quote
MoonBassAlpha Posted January 10, 2017 Posted January 10, 2017 chaps, that's 10 inches radius, [i]not[/i] degrees. Quote
franzbassist Posted January 10, 2017 Posted January 10, 2017 [quote name='MoonBassAlpha' timestamp='1484044083' post='3212109'] chaps, that's 10 inches radius, [i]not[/i] degrees. [/quote] My bad. I knew that, it's just post New Year haze descending Quote
MoonBassAlpha Posted January 10, 2017 Posted January 10, 2017 Lo-tech: Ruler, string, pencil, drawing pin, scissors, paper, responsible adult to supervise... Quote
Beer of the Bass Posted January 10, 2017 Posted January 10, 2017 [quote name='MoonBassAlpha' timestamp='1484065411' post='3212369'] Lo-tech: Ruler, string, pencil, drawing pin, scissors, paper, responsible adult to supervise... [/quote] Or scalpel blade poked through a strip of stiff cardboard or thin ply, pinned down to a piece of card and used to cut a section of circle directly. Quote
niagra Posted January 10, 2017 Posted January 10, 2017 Measure the width of the fretboard, call this c Measure the height of the fretboard (could be tricky without verniers), call this s (sagitta) The radius can then be found using this formula: [color=#000000][font=Verdana, Arial, Helvetica, sans-serif]r = (4s[/font][/color][sup]2[/sup][color=#000000][font=Verdana, Arial, Helvetica, sans-serif] + c[/font][/color][sup]2[/sup][color=#000000][font=Verdana, Arial, Helvetica, sans-serif])/(8s)[/font][/color] [color=#000000][font=Verdana, Arial, Helvetica, sans-serif]Haven't tried it myself, it's all derived from Pythagoras. Might try it tomorrow on a known radius.[/font][/color] [color=#000000][font=Verdana, Arial, Helvetica, sans-serif]Can't claim credit for the maths. I just enjoyed a pleasant mathematical half hour researching it.[/font][/color] [color=#000000][font=Verdana, Arial, Helvetica, sans-serif]Dario[/font][/color] Quote
Dan_Q Posted January 11, 2017 Posted January 11, 2017 [quote name='Dan_Q' timestamp='1483804157' post='3210253'] Yep there is the print out way which is by far the cheapest way if you have the kit If you'd prefer to get a tool though, I picked up a small steel rule with popular rad sizes punched out of the straight edges for only a few pounds off eBay. [/quote] Just for reference the one I got was this one: [url="http://www.ebay.co.uk/itm/Steel-Fretboard-Fingerboard-Radius-Gauge-Ruler-for-Bass-Guitar-Silver-BQLZR-/252505572362?hash=item3aca81440a:g:ovkAAOSw65FXtsGl"]http://www.ebay.co.uk/itm/Steel-Fretboard-Fingerboard-Radius-Gauge-Ruler-for-Bass-Guitar-Silver-BQLZR-/252505572362?hash=item3aca81440a:g:ovkAAOSw65FXtsGl[/url] [quote name='essexbasscat' timestamp='1483806002' post='3210269'] A set of radius gauges is available for around £11.00, worth the cost as a set up tool [/quote] Damn i wish I'd have known- i thought they would be more expensive than that. Very handy for setting action I imagine Nice maths there, niagra Quote
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