ได้คำตอบ และวิธีซ่อมจาก คุณ Dermot มาแล้วครับ
Hello Warit,
Sorry for the delay, I have just returned from holiday. So sorry to hear that the bridge has come off your guitar.
There are three main reasons for this happening,
1, Humidity. But this is usually only in very dry conditions and I know Bangkok is quite humid.
2, String tension too much. String gauge should be max .012 ? 0.53 on Cedar tops.
3, Case gets knocked with guitar inside and shock wave can cause bridge to come off. Guitar is best carried with string tension off.
4, The bridge was not oiled with fretboard oil. This needs to be done three or four time per year or when you change the strings.
There are probably many other reasons but those are the main four.
So, how to fix your bridge. It would be best if you can find a repair technician in Bangkok who has the tools required to do this job. I am happy to correspond with whoever you choose but here is how to do it.
1, Remove any loose strands of cedar from the underside of the bridge (only the loose strands). You can do this by just lightly rubbing your finger across the wood that is still glued to the underside of the bridge. Do not remove any Cedar that is still stuck to the bridge. Do not use a chisel or any other tools to clean the underside of the bridge.
2, Remove any loose strands of cedar from the guitar top. Do this in the same way as the bridge.
3, The glue used is Titebond 3
http://www.titebond.com/IntroPageTB.ASP?...?prodcat=1 At this point you need some clamping cauls and several clamps,
http://www.frets.com/fretspages/Luthier/...28top.html
4, Check that the bridge is fitting back into its original position, once you are happy that it is, apply the glue, then the cauls and then the clamps (see photo). Try to clean all the glue that oozes out. This glue is difficult to remove when dry, so take care to clean all the residue of glue off using a damp cloth. A little sharpened stick can be sued to clean the glue from around the bridge, wrap the damp cloth around the stick. Dry the area with a clean dry cloth, this will show any places where the glue has not been cleaned off, wipe and dry again. Leave clamped for 24 hours. I have attached a photo for you to see the bridge being clamped but there is also another piece of wood inside the guitar as well as on top of the bridge. These are the ?Cauls?.
Your guitar is ready to string up and play again. Remember that it is important to use Fingerboard oil on the bridge and fretboard.
Please let me know when you get it fixed.
Best regards
Dermot
เพื่อเป็นข้อมูลสำหรับท่านอื่นๆด้วยครับ