The first challenge series I tried it first
I will have a fun while crushing the problems
If you have any opinions or advice, thank you.

Somehow heavy industry's video lathe maintenance
   • オッサンが0.5mmの小径加工に挑戦です。  

Kuroichigo's video: Extra-fine processing general-purpose lathe
   • オッサンが0.5mmの小径加工に挑戦です。  

Sawada Machinery Co., Ltd. Overhaul
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Dino Lite
https://www.dino-lite.com/index.php