Driver for cnc DIY

Hello everybody,

I try to build laser driver for my laser engraver with a dvd burner.
I made this following plan:



i chose red laser from dvd burner with 320mA therefore R1= 3,9ohm, 1watts.

After several try, the diode doesn't engrave paper... Have you got any ideas why ?

And last question, how to buy laser 650nm and 250-300mW please ?

Sorry for my bad English..
thanks all

Max

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