Getting back to the new arm design...
Nicholas, have you considered using a printable ratchet like this:
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instead of the tuning peg? I know in many ways a tuning peg might be unbeatable, because has been designed to mantain a high tension on a string, but probably the ratchet could work, with the added benefit of being printable.
My idea is to embed it on the arm, so you can only see the peg coming out of it. Of course, that has to be designed and corrected, I'm only showing a rough concept and I don't know if PLA will be flexible enough, probably ABS would be better. Also, if you embed it, removable support material would be needed, but I see no problem, as it could break easily when first using it, we only would need to consider enough voids to let that material go out.
Nicholas, have you considered using a printable ratchet like this:
instead of the tuning peg? I know in many ways a tuning peg might be unbeatable, because has been designed to mantain a high tension on a string, but probably the ratchet could work, with the added benefit of being printable.
My idea is to embed it on the arm, so you can only see the peg coming out of it. Of course, that has to be designed and corrected, I'm only showing a rough concept and I don't know if PLA will be flexible enough, probably ABS would be better. Also, if you embed it, removable support material would be needed, but I see no problem, as it could break easily when first using it, we only would need to consider enough voids to let that material go out.