Parametric Motor Retainer

thingiverse

This parametric motor retainer utilizes the "Poor man's OpenSCAD screw library," which can be found at https://www.thingiverse.com/thing:8796. The settings within the SCAD file have been adapted to my printer, except for the dimensions at the top, so you may need to adjust the "fudge_factor" setting until you achieve an appropriate fit on your body tube and a well-functioning thread. Use this at your own risk; if you do not possess sufficient layer adhesion, this part will not retain your motor when the ejection charge goes off. Ensure that your printed part is sufficiently strong before using it in flight! If the threads are too loose, they can slip off the retainer ring, so be certain your thread clearance is tight enough as well. The clearance should be as tight as possible while the threads remain functional. Note that not all adhesives work effectively with printed plastics! Be sure you have a strong bond between the retainer ring and the motor mount tube before utilizing it for flight.