truss rod

[mainagioia]

Good morning.
I address designers who have worked in guitar companies but not only. for those who did not know there is a metal element, called truss rod that properly adjusted allows, in the guitar handle, to balance the tension of the strings. usually adjusts with a wig to the guitar shovel, in rare cases to the handle with a screw. I have a guitar with adjustment to the handle, but it's not a screw I believe. In the standard case of adjustment to the handle, I should disassemble the entire handle and turn the screw inside, in my case instead I see side holes and I wonder if they serve somehow to turn the element without disassembling the guitar. The guitar is a yamaha rgx520dz and has a series of patented functions ex novo, so I would like to understand whether even this is an innovative element or if it is a simple screw. Have you ever found similar elements in your career? From the engineering point of view, what's his name? in what designs can be used? in the future I would like to be able to work in this type of industry, so I would like to be able to understand something more and from the design point of view I would like to know any new elements. Thank you.

 

[mainagioia]

ps the system should be music man, with a caterpillar that fits into the holes, I wonder only if you have to disassemble the handle.

 

[TETRASTORE]

unlike what is indicated in manuale di yamaha, where you change the tension of the tie through the action on a screw with hexagonal hollow head (brugola) in the shovel through the appropriate key to l, in your case it seems to me a screw with a series of holes obtained on the cylindrical head (on the side) to allow the rotation through a simple point (or also a nail or other), without disassembling anything.
try to look better, you should see other holes; observing the distance of the two visible, you should have another 6 (total 8). generally it is recommended to carry out a rotation with increments of 1/8 turn (in your case space between 2 holes) between a measurement and the other of the space between rope and bridge at the 7th-8° key, the direction of rotation should be as in other models: right rotation: contrasts the tension of the ropes by putting in tension the puller for which it increases the convexity of the handle, vice versa turning to the left you curve it away from the ropes.

 

[Sleepers]

for those who did not know there is a metal element, called truss rod that properly adjusted allows, in the guitar handle, to balance the tension of the strings.

more than "balancing the tension of the ropes", the adjustment of the truss rod allows to change the curvature of the handle, which can be too concave or too convex compared to the ropes.

https://www.jamble.it/wp-content/uploads/2011/04/truss-rod1.png

looking for an exemplary image I also found a technical design of a coat handle: https://drkevguitar.com/wp-content/uploads/2014/08/truss-rod-blue-print-full.jpg