What Projects Would You Like to Do Around Arduino Days: March 21-23?

LiteWeight Gaucho Planisher

Planishing machines tend to be large and massive. It occurred to me that a pair of (perhaps ball peen) hammers could hang from a support so that the business ends barely touch each other. The intent is to have them bounce off of each other like clackers and sound like an upside down metronome which clicks when the hammers collide. Inspiration..

m.youtube.com/watch

And boleadoras from Argentina..

m.youtube.com/watch

Hang a sheet of metal between the hammers from a cord hooked through the hammer support and you can planish a thinner area in the sheet with two hammers and no anvil. Sensing when each hammer strikes the sheet and the other hammer and replacing lost energy in each swinging hammer with the arduino is the challenge. Extra credit for arduino control of sheet. Don't let it drive you clackers.

thewildotter said:

The intent is to have them bounce off of each other like clackers

Might want to be careful when striking two hardened faces together without anything between.

thewildotter said:

Sensing when each hammer strikes the sheet and the other hammer and replacing lost energy in each swinging hammer with the arduino is the challenge.

You could probably achieve this using a simple cam arrangement. Rotating cam pushes the hammers apart then lets them drop at the end of travel, like a trip hammer.

Alternatively you could perhaps use a solenoid to give the hammers a kick apart every cycle. Some clocks use this technique to give the pendulum a kick to keep it swinging.

With it being metal you could perhaps use electrical conductivity to detect when the hammer touches the metal as it will complete a circuit. Don't forget to debounce the signal to clean it up.

thewildotter said:

The intent is to have them bounce off of each other like clackers

Might want to be careful when striking two hardened faces together without anything between.

thewildotter said:

Sensing when each hammer strikes the sheet and the other hammer and replacing lost energy in each swinging hammer with the arduino is the challenge.

You could probably achieve this using a simple cam arrangement. Rotating cam pushes the hammers apart then lets them drop at the end of travel, like a trip hammer.

Alternatively you could perhaps use a solenoid to give the hammers a kick apart every cycle. Some clocks use this technique to give the pendulum a kick to keep it swinging.

With it being metal you could perhaps use electrical conductivity to detect when the hammer touches the metal as it will complete a circuit. Don't forget to debounce the signal to clean it up.