Method 2 is easier for amateurs to do and should do the job fine. The action for the rest of the strings is adjusted proportionally between these.
Martin ships their guitars with higher action because it is easier for a musician to drop their action than it is to raise it.
How to lower action on martin acoustic guitar. The truss rod of an acoustic guitar is a threaded metal rod that is inlaid within the guitar’s neck. The high ‘e’ treble string should measure between 1.59 mm (1/16″) and 1.98 mm (5/64″) at the maximum. There are generally three steps involved when you adjust the action on an acoustic guitar, which include checking and possibly adjusting three separate areas of your guitar, namely the truss rod, nut, and bridge.
Turning the truss rod clockwise on a martin acoustic will straighten the neck, and turning it counterclockwise will have the opposite effect, creating more relief, which may make the guitar more difficult to play due to the larger gap this action will create. Closing one eye, look down the side of the neck to see if it's straight. Laminate tops, even if they ship on an acoustic guitar with low action, tend to shift and move more, making whatever action you set harder to maintain.
This video has been on our to do list forever. In my experience,after purchasing new,a dozen or so martins over the past 20 years, this was the case.every guitar, dreadnought size ,om size,00 size and others had action at the 12 fret low e over.12 inches and over.10 inches at the high e.i am very particular when it comes to action and playability on my guitars.just ask the guitar techs. Start nice easy motions of to and fro sanding the saddle, check every 20 or so movements that it is being sanded down straight, also keep your fingers off the grit surface or you will remove some skin.
What you say is true for bluegrass gauge in martin's traditional line (m240) where the bluegrass gauge is light (12, 16, 25) on the top 3 strings and medium (35, 45, 56) on the bottom 3 strings. To lower the action on an acoustic guitar you don't have to adjust the bridge in any way, you only have to adjust the saddle. The following tables show typical action for guitars and bass guitars at the lowest and highest strings.
If you lowered the action at the nut, you must also lower. The saddle serves the same purpose as the nut, controlling the height of the guitar strings. This is most easily done using a ruler, measuring the distance separating the 12th fret and the sixth string.
The martin guitar factory considers a low ‘e’ bass string to be within specification if the distance from the 12th fret to the bottom of the low e string is between 2.38 mm (3/32″) minimum, to 2.78 mm (7/64″) maximum. Turn the allen wrench about a quarter turn in the appropriate direction to adjust the neck. Temperature and humidity in the guitar room.
Re:lower the action on my acoustic (martin) (pics) 2010/05/04 15:27:56 ( permalink ) my luthier will cut/slot a nut, and file it, install it, for $50. Be careful with that bluegrass gauge designation. Turn your guitar on its side and hold it at an angle with the lower side of the guitar resting on the table and the headstock at eye level.
Customers call us every single day asking how to adjust (usually lower) the action on their acoustic guitar. It's not just bluegrassers who like higher action. Carefully hold the saddle with your thumb and forefinger, use your index finger to press down on the saddle.
Measure from the top of the fret to the bottom of the string. Taylors come from the factory with lower action than a martin, but any good acoustic tech can bring the action of a martin down to match. Due to which the guitar wood gets swollen and sometimes the fret board gets bend of its shape gets altered.
Next, measure the action of your guitar at the bridge. Action measurements are typically taken using a ruler with its end sitting on top of the 12 th fret. You could do it yourself, with the right tools and all, but it'll cost you more in decent files and raw materials than just getting a guy to do it.
If the room in which the guitar is placed is humid it can lead to the socking of the water that is present in the air of the room.