Low profile motorised focuser, Astromaster 130
thingiverse
This is a low-profile focuser, initially designed for my Celestron Astromaster 130. It consists of two distinct parts: the focuser itself and a shim plate type mounting system to secure it onto the telescope. The shim can be adjusted to fit other telescopes, allowing for versatility in use. I am still awaiting a dark night to test it with my DSLR camera. The motor mount is specifically designed to accommodate a 28BYJ-48 motor. Currently, no control options are included; however, I have developed a test circuit using an Arduino Nano and an EasyDriver board (http://www.schmalzhaus.com/EasyDriver/). The stepper motor connects to the focus wheel via a flexible shaft coupling. This focuser can be used with parts from the original focuser, but I chose to use components from a broken Galaxsee scope instead, preserving the integrity of the original focuser. I created it in SolidWorks primarily to master the software, so there may be more efficient design approaches and areas for improvement. The nuts and bolts are M4 size, which were cut to length. Screws measure 3mm in diameter and approximately 5.5mm in length. <iframe width="560" height="315" src="https://www.youtube.com/embed/uWd5Pj_Cr2w" frameborder="0" allow="autoplay; encrypted-media" allowfullscreen></iframe>
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