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Laser cutter

  1. Jul 25, 2010 #1
    How to make a DIY laser cutter(small size) ? Can you help me?
     
  2. jcsd
  3. Jul 26, 2010 #2

    berkeman

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    Staff: Mentor

    Well, first you need a laser, and you need to know how to operate it safely. What laser do you plan on using? What material do you want to cut?
     
  4. Jul 27, 2010 #3
    i want to create a laser cutter small as laser pointer!!! I want to cut plastic, iron and so hard material!!!
     
  5. Jul 27, 2010 #4
    This can be done quite simply with a laser diode (LD).

    For instance, extracting an LD from an old CD-RW, DVD-RW or Blu-Ray drive and building a driver circuit could give you a laser with a power output around 200mW (the average laser point is < 5mW). If this is focussed it could burn through paper, electrical tape, pop balloons etc.

    However, you MUST have eye-protection on for this. Any laser above 5mW is class 3 and can permanently damage your eyes. Whilst shining the beam at an object seems safe, it can reflect off shiny surfaces...
     
  6. Jul 27, 2010 #5

    berkeman

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    Staff: Mentor

    A laser pointer will generally put out 1mW or so of radiant energy. How much optical power do you think it would take to cut even a soft material? You can estimate that number by remembering that you can use a 10cm magnifying glass in bright sunlight to melt soft materials....
     
  7. Jul 27, 2010 #6
    A key-chain laser pointer that can cut through iron? Would you like a spaceship to go with that, or would that be all, sir?
     
  8. Jul 28, 2010 #7
    Is I use almost 500mW d.c. and use tow convex lens has focal length of 5cm and the distance between them is less than 1cm, and add a cooling system by using liquid!!! Can the laser cutter form?
     
  9. Jul 28, 2010 #8

    berkeman

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    You have a 1/2 Watt laswer diode? Where did you get it?
     
  10. Jul 29, 2010 #9
    Is 0.5W laser diode hard to find? If I have, can the plan that I post previous one work?
     
  11. Jul 29, 2010 #10
    Well, 500mW is very powerful. Just make sure you use goggles....

    And the rough plan sounds ok - essentially you need a driving circuit (inc. cooling) and some way of mounting it with a lens to focus the energy. I don't know what exactly are the 'cutting limits' with this but you'll certainly burn through paper and thin materials (even at a distance).
     
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