Dropping Eggs From Drones for Science and Fun UPGRADED

prusaprinters

<p>I was invited to participated Fort Wort Academy's Egg-Drop event again this year. Since there was a problem with eggs getting stuck in the cups last year I decided to revisit the design and make some improvements. With the rig from last year to fall back on I had very little pressure from a clock. I'd experimented with OpenSCAD here and there but this was an opportunity to work a complicated design in the software. In the end I set up one file with my parameters and definitions and "imported" and "include" several .scad files for pins (Thanks emmett!) and the servo arm fitting (Thanks again hugokernel!)</p> <p>The only object that wasn't generated natively in SCAD was the Iris mounting bracket. I downloaded Ferdinand128's beautifully finished STL and tweaked it for the pins in SCAD before exporting the modified version.</p> <p>I had to make several separate .scad files for separate components due to complexity and the capabilities of OpenSCAD. I combined the exported STL files into a single SCAD file for visual checks of the final assembly prior to printing. While I had them combined in the final assembly I went ahead and animated it because why not? (What do you know, thingiverse doesn't like animated .gifs)</p> <p>I'll upload more pictures and videos after the event.</p> <h3> Post-Printing</h3> <p>I printed several tests in PLA from my scrap built Prusa i3 but the final print was done in ABS at the Dallas Maker Space (@dallasmakers). We ran into a warping problem last year after the PLA rig sat in a hot car long enough for the bolts and screws to deform the rig enough that it had to be reprinted.</p> <p>Once printed all parts use pins to snap in place. The only screws will be to hold the servo arm to the servo, the servo to the top frame and the mounting bracket to the Iris Plus. I had expected to have to use acetone or friction welding on the pins just to be sure everything was solid but after it was assembled it felt strong enough without. If it does fall apart at the even it can simply be snapped back together and welded later.</p> Category: R/C Vehicles