Andy Martin
Automotive
- Apr 30, 2019
- 2
I have a very compact device that I'm designing. It pulls cords (fishing line) that operate the chords on a guitar for people not able to use the fret board.
Here the problem - a first class lever pulls on three cords simultaneously in response to finger pressure on the other end of the lever. I need to pull all three cords with equal force. With two it would be simple - just loop them around a single pulley and pull the axis - the pulley would turn to equalize the force. But what can I do with three cords?? Really struggling to come up with any mechanism (nearly as simple as a pulley) that would equalize the force on three cords.
Any inspiration?
Andy
Here the problem - a first class lever pulls on three cords simultaneously in response to finger pressure on the other end of the lever. I need to pull all three cords with equal force. With two it would be simple - just loop them around a single pulley and pull the axis - the pulley would turn to equalize the force. But what can I do with three cords?? Really struggling to come up with any mechanism (nearly as simple as a pulley) that would equalize the force on three cords.
Any inspiration?
Andy