One evening of CAD. One evening of CAM. One evening of CNC. And it fit together (quite well). This is just held together with precisely located wooden dowel pins. We will add screws tomorrow.
The only missing piece is the actual guide for running the blocks through. That is separate so that it can be “dialed in” to the perfect cutting depth.
The inside of the barrel tumbler needs a polygon (made from wood) in order to (a) give enough “traction” to turn the contents, and (b) protect the barrel from repeated impacts. I’m going to use Oak or Maple to do this. Based on the width and thickness of available material, I chose a 9-sided polygon.
Here is a picture of the CAM operation prepared using Fusion 360. I will make nine of these with just a fraction of an inch extra that I can remove on the jointer while getting a tight fit.
Here is a screenshot of some of the parts we’ve designed for the Stain Dipper. All of the mechanical parts are in the design and correctly positioned and all the hardware has been ordered…
Here are several of the parts from Fusion 360
Here is a servo motor mount and custom made pulley.
Here is a small piece of Nylon used to connect a 1/16″ cable with a aluminum tube.
Here is a little robot the kids and I were working on.
We designed it in Solidworks.
Prepared for printing in the MakerWare software.
Printed it on the MakerBot. It failed halfway through and we had to re-print some of the parts.
Here is a closeup of the print.
And some pictures of the finished chassis.
We used custom rubber bands for tires. Threads were even printed into some of the parts so 6mm bolts could screw right in.
Here is a video of our CAMaster Cobra 508 ATC CNC Router cutting hardwood plywood for a Ballista.
The Gahooa Perspective 