How far to bend a C#

[CJHillman]

How much travel should the string cap (bit that comes through the guitar with the string attached) have?

i want to be able to go from a B to a C#

Its looking at the moment to travel only a few millimeters

any info will be greatly appreciated. Will be trying to rectify it tomorrow.

Chris

[RollingBender]

I just measured one of mine (the best I could) and came up with about 1.3mm on a .009" string.

Are you building your own?

[Raybob]

I think with a .012, a 'few millimeters' sounds about right. You could calculate how far the string pulls using your string gauges. Measure diameter of tuning peg string is wrapped on. Tune your B string, then count rotations of tuning gear to get to C#. That number of turns x 360, divided by 12 = degrees of rotation of peg (assuming 12:1 tuning peg). Deg of rot/360 x D x pie = string pull.

[CJHillman]

Yeah building my own. hopeing to get it finished today fingers crossed. It moves a bout 3mm so i'll just try to get a string on the hub and try it. I thought it might not be enough but thats restored my faith.

[gumbo]

Gudday!

Speaking as someone who has fooled (a lot!) with this principle in building my own modifications to a Bigsby Palm Pedal, can I suggest that the thing to measure is the travel AT THE CIRCUMFERENCE....

....in other words, if you're not getting what you want, you have to re-consider the diameter of the 'peg' on which you're winding the string..

In the case of the design of your bender, though, I concede that there are limitations before you start to introduce serious alignment problems... I was lucky that the axis of my components was at 90 degrees to yours..

Good luck in getting it all together... sure feels good when it all works out!

[CJHillman]

Thanks guys.... i can tell you it works really well!! its strange to play at the moment so i think i need to get used to that.... but it pulls to a C# great and with a decent amount of travel.... i'll put up some pics in the other thred and link it to this one later.... maybe a vid in a few days... really cuffed with it.

[telex76]

Are you going to have some adjustment on it? Be pretty hard to keep it bending to the right pitch without being able to adjust at least a little.

[CJHillman]

Its got a tuning screw built into the top of the guitar that stops the arm moving up to much. its pretty tight to so it wont move about... been playing for about 2 hours on and off now and only had to adjust that once.

[CJHillman]

This is a link to the pictures in the other thread. (just so i dont have to re-post the whole story)

http://www.tdpri.com/forum/b-bender-...ml#post4144620

This is the finished guitar

[CJHillman]

Heres a quick video i made on a laptop webcam

http://www.youtube.com/watch?v=yRmlQJQhlts