Celestron C8 EdgeHD 800 28BYJ-48 Stepper Coupler system

thingiverse

Credit goes to jbrazio for the Ardufocus project that initially sparked this endeavor. https://github.com/jbrazio/ardufocus A simple, removable 28BYJ-48 stepper coupler system designed specifically for Celestron SCTs is now available. To release tension on the two retaining screws and remove the assembly from the top of the focuser for manual focusing, simply loosen the retaining screws. This design is ideal for EdgeHD 800 telescopes but should also work with other C8 scopes featuring a 13mm focuser shaft. The hex socket must fit snugly yet move freely on top of the coupler to minimize any potential backlash. M3 screws are used to secure the stepper to the adapter's top, while M4 screws hold the adapter firmly in place on the mount. The coupler and socket friction-fit over the focuser and stepper shafts respectively.