A ukulele capo based on the design by MarkBenson. Prints in two parts and uses a peg spring for tension.
Update: Now with Fusion 360 file!
Fits a ukulele with a neck up to 37mm wide and around 21mm deep (less if using padding).
I really liked the design of the ukulele capo by MarkBenson, but after printing it I realised that my peg springs don't fit, so I re-built the design in Fusion 360, changed the allowances for the spring, added some extra thickness around the spring to account for the larger spring, and boom - another version!
This new version takes a peg spring with a 7mm coil in the middle, arms approx 17mm long, and made from 2mm wire. Commonly found in NZ.
Spring arm length can be changed by bending the arms to shorten them, which allows the fit between the clamp and the trigger to be adjusted.
Adding soft self-adhesive velcro to the clamping surfaces works well and will help prevent the ukulele and strings from getting scratched.
My version is printed in PLA at 0.3 res. It probably doesn't matter, but should be printed for strength. I recommend using options like 'detect thin walls' in your slicing program to help strengthen the print.
Check that the printed hole in the trigger is large enough for your chosen spring.
Adding the spring from a clothes peg is relatively simple. I recommend attaching the spring to the body of the capo first, then use pliers to open the spring and attach it to the trigger.
After assembling, if the base of the trigger isn't sitting snugly against the spring, bend the arm of the spring that attaches to the trigger to shorten the distance to the spring coil. It should sit snugly against the coil to prevent it from being too sloppy.
I also recommend adding soft velcro to the clamping surfaces to protect the ukulele and the strings from scratching.
Designed by printing the original design from MarkBenson, drawing up a copy of the design in Fusion 360 using measurements taken from calipers, and then modifying it to suit my requirements.