I had a purchased plan that was enlarged 150% The original design had the head loose on a rod. I laid out some points for hollowing out the cavity and the reed on the plan shown. The cut out per the plan was used for the spring mechanism to bob the head and clack( the light colored piece in pic) (Compare plan to open pics). there is also a reed that is flicked by the cam. (both are the same color as background) The body was hollowed out for resonance.
The mechanism was designed using the gafboat method of seeing how things fit. Trip hammers were the first machine man built so I reasoned it would be easy. It took me two weeks of piddlin The cam trips a reed which produces a click it then pulls head down which springs back which gives a clack. The body was made with ash and airbrushed with a green translucent paint.The sides are made from mahogany. The axle is all thread. I used nuts and locktite to mount the cam. I made bushings for the axle by drilling out t-bolts. I made spacers for the axle from HDPE scraps by drilling them and scroll sawing from 1/8" sheet. The trip block on the head has a set scew tapped into it to attach head I drilled a 7/32 hole and used oil with the tap and got good results.
And yes it was made for a toddler to ding up and scratch Builds character and shows she loves it.
Learning is an exciting adventure
Last edited by paduke; 10-26-2016 at 06:15 PM.