Summary

Here it is how to draw a planetary gear, very useful in robotics transmissions. Using only EXCEL and OpenSCAD. The planetary could be customized to yield a proper design for your own project.

OpenSCAD has a library to draw gears, easily, however: you must be able to calculate the number of teeth related to the wanted pitch.

I tried to build a library to ease this process, instead I found excel useful to make the calculations.

Print Settings

Printer Brand:

Prusa

                                            <p class="detail-setting printer"><strong>Printer: </strong>                     <div><p>Prusa Clone</p></div></p>                                                                                <p class="detail-setting rafts"><strong>Rafts: </strong>                     <div><p>Doesn't Matter</p></div></p>                                                                                <p class="detail-setting supports"><strong>Supports: </strong>                     <div><p>Doesn't Matter</p></div></p>                                                                                <p class="detail-setting resolution"><strong>Resolution: </strong>                     <div><p>3mm</p></div></p>                                                                                <p class="detail-setting infill"><strong>Infill: </strong>                     <div><p>solid</p></div></p>                                                        <br>                        <p class="detail-setting notes"><strong>Notes: </strong>                    </p><div><p>none</p></div>

Post-Printing

none

            <div><p>Gears may found tighten after printing process, steer apart softly.</p></div>

How I Designed This

            <p class="detail-caption"><strong>Computing DIstances</strong></p>                <p class="detail-title"><strong>Distances & Teeth</strong></p>            <div><p>Using Excel: You may find the distance from planets to the sun-centered, and the number of teeth each planet should have. Take a look of the calculations (They are showed on worksheet as comments)</p></div>

Planetary calculations