Belt Sander with adjustment of tape position. New mechanism.

I made a belt sander with belt adjustment. Tape 610x50mm (half from 610x100mm). The roller - the M14 coupling is filled with epoxy resin.
https://youtu.be/Gjg_IsFS_28

<!-- BEGIN /var/www/html/homemadetools/protected/modules/zeus/views/tool/postUpdate.php -->
Thanks manshands! We've added your Belt Sander to our Belt Sanders and Grinders category,
as well as to your builder page: manshands's Homemade Tools. Your receipt:

<div id="blocks"> <div class="block b1 pngfix"> <div class="bimg"> <div> <a href="https://www.homemadetools.net/homemade-belt-sander-78"> <img src="/uploads/234415/homemade-belt-sander-78.jpeg"/> </a> </div> </div> <div class="head pngfix"></div> <div class="left pngfix"></div> <div class="right pngfix"></div> <div class="blockover b1 pngfix"> <div class="title"> <a href="https://www.homemadetools.net/homemade-belt-sander-78">Belt Sander</a> <span> by <a href="https://www.homemadetools.net/builder/manshands">manshands</a></span> </div> <div class="tags">tags: <a href='https://www.homemadetools.net/tag/belt-sander'>belt sander</a>, <a href='https://www.homemadetools.net/tag/angle-grinder'>angle grinder</a> </div> </div> </div> </div>
<!-- END /var/www/html/homemadetools/protected/modules/zeus/views/tool/postUpdate.php -->