Setting Laser Focus on Your K40 Laser

I'll show you how to find the perfect focal distance for your laser using the ramp method. Then I'll show you a cool trick that I use to find the optimal material height to get the perfect engrave or cut.
Tools I Used (Affiliate):
6" Adjustable Combo Square: amzn.to/3fdEwuJ
Lab Jack: amzn.to/34VMhkX
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