Originally Posted By: pca
You have to remember to keep body parts you value out of the beam at the moment.

Mind you, it makes remembering this very easy, once you've been bitten the first time wink Pavlovian conditioning to extreme pain and the smell of burning flesh is very fast-acting...

pca

I was also thinking about the danger of reflections of the laser beam, especially with 100W tube and the beam being IR. You have probably heard the "famous" warning from laser operators: "Don't look into laser beam with remaining eye"... smile
I built a buildlog.net 2.x laser cutter just after the empeg meet in 2011. Mine's only "40W", though. I had the Misumi extrusions sent to the hotel. Saved me from the VAT and some shipping charges...