# How far to bend a C#

CJHillman
May 6th, 2012, 05:27 PM
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
May 6th, 2012, 10:52 PM
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
May 7th, 2012, 03:38 AM
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
May 7th, 2012, 05:41 AM
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
May 7th, 2012, 07:14 AM
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.. :idea:

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
May 7th, 2012, 09:28 AM
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
May 7th, 2012, 12:38 PM
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
May 7th, 2012, 01:11 PM
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
May 7th, 2012, 01:49 PM
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-forum/322836-newbie-making-b-bender.html#post4144620

This is the finished guitar

http://i286.photobucket.com/albums/ll97/chrisofyellow/P1030094.jpg

CJHillman
May 7th, 2012, 02:34 PM
Heres a quick video i made on a laptop webcam

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