Summary

Gage designed to check Roller Coaster Devices in Science Olympiad competitions, 2019 rules.

Print Settings

Printer Brand:

Prusa

                                            <p class="detail-setting printer"><strong>Printer: </strong>                     <div><p>i3 MK2S</p></div></p>                                                                                <p class="detail-setting rafts"><strong>Rafts: </strong>                     <div><p>No</p></div></p>                                                                                <p class="detail-setting supports"><strong>Supports: </strong>                     <div><p>Yes</p></div></p>                                                                                <p class="detail-setting resolution"><strong>Resolution: </strong>                     <div><p>0.2</p></div></p>                                                    <strong>Filament:</strong> Inland ABS                    <br>                        <p class="detail-setting notes"><strong>Notes: </strong>                    </p><div><p>The laser gap gage was oriented with the cylinder vertical</p></div>

Post-Printing

Obviously the support material had to be removed. rnThe corner brackets needed a little filing to ensure they were accurately square.rnThe laser gap holder square hole that slide over the aluminum bar needed a little adjustment with a file to provide a tight fit for accuracy, but loose enough to move relatively easily. Some stiction is good as it holds position to allow measurement

How I Designed This

The long sections are aluminum extrusions from Misumi (there are other sources) 2020 HSFS cross section. I buy cut to length, so far Misumi has been very accurate with what they ship.rnrnI designed the corners as it was cheaper for me to print ones that large than to buy.rnrnThe laser gap holders are sized such that if they touch, the centerlines are exactly 5 cm apart, the minimum under the rules.rnrnThe lasers themselves are laser bore sighters for a 30-06. I priced generic accurate laser pointers that were aimed precisely down a centerline that I could make a gage too. Expensive. These bore sighters were much cheaper.rnrnTwo problems with the bore sighters. One, the batteries don't last long, I can inspect about 40 devices before the button batteries give out. Two, there is no easy on-off, so you have to be really aware where the lasers are pointing when you aren't measuring.rnI plan to solve those problems by wiring in an external battery with switch. Shouldn't be too hard.

Gage for Science Olympiad Roller Coaster 2019