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Chris Ensor
 Post subject: Saddle Slot Angle
PostPosted: Fri Oct 04, 2024 2:05 pm 
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How do you prefer to set the angle of your saddle slot? Do you calculate the angle? Measure the slope over a certain distance (1/8" over 3" per Cumpiano)? Or some other method?

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bluescreek
 Post subject: Re: Saddle Slot Angle
PostPosted: Fri Oct 04, 2024 2:25 pm 
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Martin uses a 3 degree angle gibson used under 4 over 3 I find the 3 degree angle with a .1 saddle slot will afford you ample adjustment for intonation compensation I have actually set guitar bridges unslotted and with a drill blank set the strings for the best intonation , that is were I found the slightly wider saddle on a 3 degree angle works pretty well.
I also use .1 compensation length based off the first string and 2.25 on the the bass . So in a nutshell the bass is 1/8 inch longer than the treble.

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These users thanked the author bluescreek for the post (total 2): Pat Foster (Fri Oct 04, 2024 9:50 pm) • Kbore (Fri Oct 04, 2024 3:32 pm)
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meddlingfool
 Post subject: Re: Saddle Slot Angle
PostPosted: Fri Oct 04, 2024 3:31 pm 
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Mine is a 4mm offset measured at the e strings…
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rmmottola
 Post subject: Re: Saddle Slot Angle
PostPosted: Fri Oct 04, 2024 6:07 pm 
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I never actually made use of an angle for positioning the bridge slots of steel string acoustic guitars (there seem to be a lot of different conventions used), relying on the compensation calculations from the Fretted Instrument Bridge Saddle Compensation Calculator https://www.liutaiomottola.com/formulae/compensation.htm on my website, or the plan detail as generated by "G" Thang https://www.liutaiomottola.com/formulae/gthang.htm. So I was curious about this as well. Looking at the output of those tools for a conventional steel string acoustic guitar with typical action and string set, the angle comes in at exactly 3 degrees.

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These users thanked the author rmmottola for the post (total 2): Kbore (Sun Oct 06, 2024 2:33 pm) • Pat Foster (Fri Oct 04, 2024 9:50 pm)
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Terence Kennedy
 Post subject: Re: Saddle Slot Angle
PostPosted: Fri Oct 04, 2024 6:36 pm 
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Always a 1/8” drop back over three inches. With a 1/8” saddle I have never had problems getting good intonation points.
I’ll have to measure the angle.

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Mike_P
 Post subject: Re: Saddle Slot Angle
PostPosted: Fri Oct 04, 2024 8:30 pm 
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numbers....

1/8" tilt divided by spacing of let's say 2 1/4" = .055555556

take the arc tangent of that and the angle = 3.18*

2 5/16" spacing gives 3.09*

hey, just call it a nice even 3* ;)

over a 3" run you get 2.39*


These users thanked the author Mike_P for the post: Kbore (Tue Oct 08, 2024 9:45 am)
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Hesh
 Post subject: Re: Saddle Slot Angle
PostPosted: Sat Oct 05, 2024 2:29 am 
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3 degrees.


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