Celestron C8 EdgeHD 800 28BYJ-48 Stepper Coupler system
thingiverse
Credit to jbrazio for the Ardufocus project that got me going down this path in the first place. https://github.com/jbrazio/ardufocus Easily removable 28BYJ-48 stepper coupler system for Celestron SCTs. Release tension on the two retaining screws and stip the whole assembly off the top of the focuser for manual focusing. Designed for EdgeHD 800 but will probably work on other C8 telescopes where the focuser shaft is 13mm. The hex socket should be a snug but movable fit on the top of the coupler to minimize any backlash. M3 screws to retain the stepper to the top of the stepper to the top of the adapter. M4 screws to retain the adapter to the mount. The coupler and socket are friction fit over the focuser shaft and stepper shaft.
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