ZWO EAF Holder for Celestron Edge HD 9.25

thingiverse

ZWO EAF Holder for Celestron Edge HD 9.25 or other similar Celestron SC telescopes features a quick unlock mechanism for manual focusing. ### BOM * 1x GT2 Timing pulley with 20 teeth and a bore of 5mm * 1x GT2-142mm Timing Belt with a size of 6mm * 3x M4 worm gears * 3x M3 x 15mm Inbus screws * 2x M4 x 35mm Hex Head Screws * 2x M4 assorted parts Add for Version 2: * 2x M3 x 15mm Inbus screws * 2x M3 x 20mm screws * 2x M3 nuts Add for Version 3: * 1x M4 x 20mm Hex Head Screw * 1x M4 nut * 1x M4 assorted parts ### NOTE Use a M4 tap to create a thread in the pulley and an M3 tap to create a thread. FreeCAD source available on my GitHub repository at [github](https://github.com/romanhujer/Elektronic-Focuser-for-Sky-Watcher/blob/master/MyFocuserFreeCad/ForZWO_EAF.FCStd). ### UPDATE 2019-12-08: Version 2 adds a belt tensioner. 2019-12-11: Version 3 improves belt tension. ### Other remixes: * [Some improvements by James Dedij](https://www.thingiverse.com/thing:4191869)