Martin CEO-4R back bow . - FRETS.NET2024-03-29T14:13:26Zhttp://fretsnet.ning.com/forum/topics/martin-ceo-4r-back-bow?commentId=2177249%3AComment%3A185016&x=1&feed=yes&xn_auth=noWith strings off it has a rad…tag:fretsnet.ning.com,2019-05-05:2177249:Comment:1850162019-05-05T22:57:13.282ZLen Biglinhttp://fretsnet.ning.com/profile/LenBiglin
<p>With strings off it has a radical back bow from sound hole to nut , Ive advised the owner to return it , he has that option . </p>
<p>With strings off it has a radical back bow from sound hole to nut , Ive advised the owner to return it , he has that option . </p> If the neck is actually dead…tag:fretsnet.ning.com,2019-05-05:2177249:Comment:1850152019-05-05T22:09:56.227Zjbbancrofthttp://fretsnet.ning.com/profile/JamesBBancroft
<p>If the neck is actually dead flat, the simplest repair would be to install a higher saddle. But if the fretboard has a crown, or bowed up, then that needs correcting.</p>
<p>Jim</p>
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<p>If the neck is actually dead flat, the simplest repair would be to install a higher saddle. But if the fretboard has a crown, or bowed up, then that needs correcting.</p>
<p>Jim</p>
<p></p> Thanks Jim , I'm considering…tag:fretsnet.ning.com,2019-05-04:2177249:Comment:1850132019-05-04T09:20:55.221ZLen Biglinhttp://fretsnet.ning.com/profile/LenBiglin
<p>Thanks Jim , I'm considering that too .</p>
<p>Thanks Jim , I'm considering that too .</p> I’ve found that a neck with u…tag:fretsnet.ning.com,2019-05-03:2177249:Comment:1850092019-05-03T22:40:09.405Zjbbancrofthttp://fretsnet.ning.com/profile/JamesBBancroft
<p>I’ve found that a neck with up bow is generally caused from high humidity. Low humidity will cause the opposite effect or more relief which the truss rod will correct.</p>
<p>you could loosen the truss as much as possible, place a 2”x2” block the length of the fretboard with a slight shim in the middle and clamp the block at both ends. This will bow the neck in the opposite direction.</p>
<p>you could add a little heat by wrapping the neck in a heating pad on either low or medium heat. Let…</p>
<p>I’ve found that a neck with up bow is generally caused from high humidity. Low humidity will cause the opposite effect or more relief which the truss rod will correct.</p>
<p>you could loosen the truss as much as possible, place a 2”x2” block the length of the fretboard with a slight shim in the middle and clamp the block at both ends. This will bow the neck in the opposite direction.</p>
<p>you could add a little heat by wrapping the neck in a heating pad on either low or medium heat. Let this sit for 3 to 5 days then check neck, let is sit longer if needed.</p>
<p>Jim</p> Hi Hesh , nice to hear from y…tag:fretsnet.ning.com,2019-05-01:2177249:Comment:1850032019-05-01T07:43:52.905ZLen Biglinhttp://fretsnet.ning.com/profile/LenBiglin
<p>Hi Hesh , nice to hear from you again , I guess that makes sense , seeing its actually dead flat now it won't need much dressing . It is a single action rod . Thanks Hesh.</p>
<p>Hi Hesh , nice to hear from you again , I guess that makes sense , seeing its actually dead flat now it won't need much dressing . It is a single action rod . Thanks Hesh.</p> Hey Len: This one must be ol…tag:fretsnet.ning.com,2019-05-01:2177249:Comment:1848182019-05-01T04:21:32.128ZHesh Breakstonehttp://fretsnet.ning.com/profile/HeshBreakstone
<p>Hey Len: This one must be old enough that Martin was not using their double action rod yet, eh. We see a lot of back bowed Martins in our climate and it's usually because they dried out. Fret sprout is also a symptom of this.</p>
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<p>I'm not a fan of heat treating because there is no telling if it will take over time or if the thing will come back with the same issue.</p>
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<p>My suggestion is to mill in relief as you already thought that you might. We level with calibrated…</p>
<p>Hey Len: This one must be old enough that Martin was not using their double action rod yet, eh. We see a lot of back bowed Martins in our climate and it's usually because they dried out. Fret sprout is also a symptom of this.</p>
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<p>I'm not a fan of heat treating because there is no telling if it will take over time or if the thing will come back with the same issue.</p>
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<p>My suggestion is to mill in relief as you already thought that you might. We level with calibrated leveling beams and when I want to add relief I press slightly on the head stock with the neck supported under the 7th while sanding with the beam the frets in the region that I want the relief. In this case I would level the frets level on the treble side counting on string tension to provide some relief. On the bass side while leveling I would gently press on the head stock to make the frets 3 - 10ish slightly proud and let the beam hit them and mill in relief.</p>
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<p>In other words reshaping the fret plane would be my preference and it's a fix that will last.</p>
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<p>Good luck.</p>