Actuator for small window

thingiverse

A Simple Actuator Made from a Compact Metal Geared Motor: 12V motor available at http://s.click.aliexpress.com/e/bTtwpF3a, or 24V motor at http://s.click.aliexpress.com/e/EBW8dAY. I use the 4 RPM version, but 1 RPM to 4 RPM is acceptable. A smaller RPM results in a stronger actuator. This device was designed to remotely open and close a small window (30x45cm) in the attic using mysensors relays from https://www.mysensors.org/build. Important: The actuator's PLA parts are not resistant to storms or strong winds! I plan to add a metal rigid flange connection on the motor shaft. In addition to this device, you will need: 2x micro switch (6mm height) available at http://s.click.aliexpress.com/e/bWFlxPYy 2x rectifier diode (ex. 1N4007) wires 2x M5 bolts and 4x M5 nuts (to join a crank with the arm and the window bracket) 2x M4x10 bolts and 2x M4 nuts (to regulate length or arm) 5x M4x10 bolts and 5x M4 nuts (to join the motor base and the metal plate) 4x M3x7 bolts (to join the motor and the motor base) 1x M3x1 bolt and 1x M3 nut (to fix the crank and a motor axis) A universal metal plate (thickness min 3mm) with holes (20mm hole offset) can be obtained from a DIY store. FreeCAD files are included. The simple mechanical simulation in sketch okienko-simulation.fcstd is used to derive a place to mount window bracket (a distance from a window hinge) and length of arm. The switches and diodes limit rotation to about 160 degrees. Electrical connection diagrams are attached. The window can be controlled by changing polarity on power lines. To open or close manually, you can disconnect the arm from the window bracket.