Home › Blog › Buying Guide › From Factory Floor to Your Workshop: Evaluating a Pre-Owned , Used , Secondhand, Surplus CNC Machines Before Purchase Doosan Puma 3100 LY CNC Turning Center made in South Korea Here’s a detailed, structured evaluation framework tailored to a Doosan Puma 3100 LY CNC turning center (or variants thereof) — what to look for, pitfalls, and how to “stress test” things....