31 Mar '16, 11pm

3D-Printed Case Turns Servo into Quality Linear Actuator

3D-Printed Case Turns Servo into Quality Linear Actuator

Micro servomotors are a hacker staple. You’ll find maybe four or five in an RC plane, while a hexbot build could soak up a dozen or more of the cheap and readily available devices. Unfortunately, long-throw linear actuators are a little harder to come by, so it’s nice to know you can 3D-print linear gearing for standard micro RC servos and roll your own. Currently on revision 2, [Roger Rabbit]’s design is not just a quick and dirty solution. He’s really thought through the problems he observed with his first revision, and the result is a robust, powerful linear actuator. The pinion fits a trimmed servo crank arm, the mating rack is stout and stiff, and early backlash problems have been solved. The whole case is easy to assemble, and as the video below shows, the completed actuator can lift 300 grams. We like [Roger]’s build process, especially the iterative approach to imp...

Full article: http://hackaday.com/2016/03/31/3d-printed-case-turns-serv...

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