Gord over at Gord’s Garage has been busy with home-based anodizing. It’s some amazing stuff he is doing. I sent him one of the rubber band gun assemblies, and he did an amazing job on it.
In an incredible amount of detail, Gord has written up and photographed the whole process:
In summary, it went from this mill finish:
To this polished finish:
To this anodized finish:
Have recently acquiried a nice stepper motor from Jameco Electronics. It is a small motor, less than 2″x2″x2″, but still has substantial torque. I will get into more Arduino + Circuits + Electro-Mechanical detail soon, but for the moment, I wished to share a couple of screen-shots of the 3D model and the actual parts that I am modeling and assembling.
In this model, I’m (quite happily) making heavy use cross-part references in the assembly. I caught onto that concept by reading the Top Down Design Overview at the SolidWorks website.
Some time ago, Eli asked me to build a toy shotgun. We wanted something that would give a real “bang”, but be simple and safe.
Provided that a large mass of metal was collided into another at sufficient speed, the user would experience both a “bang” and a “kick” (although inverse).
We milled, drilled, and fit a bolt into a square aluminum tube. A spring connected the front of the bolt to the front of the tube. When the bolt was retracted and released, it would collide into the square tube with the desired effect.
The end result is here:
And, enjoy the pictures.