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Type: Posts; User: owhite

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  1. Thread: nice 50w laser

    by owhite
    Replies
    0
    Views
    414

    nice 50w laser

    Holy crap :: this is a nice laser.

    http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=7601311332

    I in no way profit from sale of this item.

    owen
  2. Replies
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    477

    that's amazing. Always nice to have a backup...

    that's amazing. Always nice to have a backup machine if the first one breaks. Did you get it on ebay? I didnt see any being sold. If you know of another I could buy let me know.

    owen
  3. Replies
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    477

    Romos, check this out: ...

    Romos,

    check this out:

    http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=7574932810

    these look like the power supplies for our lasers.

    Man, these things are worth a lot of money.
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    477

    interesting CO2 laser on ebay.

    People,

    PROVIDED ITS THE REAL THING, there is a very interesting deal on ebay for a C02 laser.

    see:

    http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=7572780915

    its description is the...
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    348

    I think there are not a lot of readers on this...

    I think there are not a lot of readers on this forum that use lasers at power level that your laser has. I'm told that this is a good book and may answer your questions:

    Co2 Laser Cutting
    ISBN:...
  6. Replies
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    584

    When you say you want the laser to engrave, it...

    When you say you want the laser to engrave, it could mean two things.

    In one case, you may simply want to set the power of the laser so it burns into the material. In this case the laser will...
  7. Replies
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    366

    TIG welding stainless steel

    Hey people,

    A bit off-topic but I recently bought a maxstar 150 TIG welder to weld stuff I cut with my laser system.

    Here's a
    picture
    of small head made of 0.032 inch thick stainless...
  8. Replies
    5
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    211

    how many watts is that thing? when was it made?

    how many watts is that thing? when was it made?
  9. Thread: Cutting Paper

    by owhite
    Replies
    2
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    734

    These guys: ...

    These guys:

    http://www.parallax-tech.com/faq.htm

    http://www.parallax-tech.com/cutting.htm

    point out that you can cut cloth with 25 watts

    and sandpaper at 100watts (which is just plain...
  10. Thread: Beam Expander

    by owhite
    Replies
    9
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    1,021

    I'm sure I'm missing something, but why would the...

    I'm sure I'm missing something, but why would the focal length be shorter? I would have thought that focal length is the same regardless of beam diameter. Perhaps you'd have to use a different...
  11. Thread: Beam Expander

    by owhite
    Replies
    9
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    1,021

    oh yeah the other thing I could do if you go...

    oh yeah the other thing I could do if you go ahead with making one is I'll open up my expander and make certain about the orientation of the lenses. You have to know if the plano side or the convex...
  12. Thread: Beam Expander

    by owhite
    Replies
    9
    Views
    1,021

    Sorry I wasnt able to find the diagram that I...

    Sorry I wasnt able to find the diagram that I once saw on the 'net. To my knowledge there's a couple strategies for making a beam expander. The method I knew about is to have two plano-convex...
  13. Thread: Beam Expander

    by owhite
    Replies
    9
    Views
    1,021

    Paul, dont see why not. photons in, photons...

    Paul,

    dont see why not. photons in, photons out, right? :-) In front of my laser I have something called a cut quality enhancer, which is basically a polarizer that's supposed to avoid letting the...
  14. Thread: burn

    by owhite
    Replies
    8
    Views
    890

    zoltan, have a look at posts in the CNCzone...

    zoltan,

    have a look at posts in the CNCzone Laser Cutting Machines forum, and peruse this site:

    http://nilno.com/laser_dir/blogger.html

    and then feel free to post questions.

    owen
  15. Thread: burn

    by owhite
    Replies
    8
    Views
    890

    burn

    Got my first serious burn from the laser today. My hand was pulling out a part while the system was running (might be hard to believe but there are many occasions where you have to do this or quit...
  16. Replies
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    700

    wow. That's faster than my system. You should...

    wow. That's faster than my system. You should type up your SOP (standard operational procedure).

    However, wouldnt you agree that it would be nice to have an enclosed system which protects the...
  17. Replies
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    700

    ebay auction -- nice optics

    Forget the laser (10 watts, pfftt). But buy the unit for the optics.

    http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=5604933806

    Based on his experiences,
    ...
  18. Replies
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    446

    well, I can tell you what I think focal length...

    well, I can tell you what I think focal length and depth of field means.

    Lets call the cross over point where the beam is at its minimum diameter the beam waist. The cross-section of the beam...
  19. Replies
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    446

    I dont claim to know what the industry standard...

    I dont claim to know what the industry standard is but I would say you'd shoot for the middle. Think in terms of maximizing the power density of the beam -- smaller beam is always better. The beam...
  20. Replies
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    4,734

    I dont know for sure, but my intuition is that...

    I dont know for sure, but my intuition is that you should be able to cut 1/8th at lower than full power settings.

    This thread:

    http://www.cnczone.com/forums/showthread.php?t=8143

    discusses...
  21. Replies
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    4,734

    Hm. I dont know off hand what would produce that...

    Hm. I dont know off hand what would produce that (besides a non-creative suggestion like "hey you must have bumped something".)

    There's a good chance that formation of the ring does not mean that...
  22. Replies
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    4,734

    It doesnt sound like it but if you want to get...

    It doesnt sound like it but if you want to get into doing the electronics yourself I'd suggest looking into using AVR programmable chips. These devices let you interpret signals like highs and lows...
  23. Thread: skeletal frog

    by owhite
    Replies
    24
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    1,267

    not that it'd be much fun to go through the whole...

    not that it'd be much fun to go through the whole process but I wonder if it would work to embed the brass sheet in parafin, and then mill the parafin block.

    owen
  24. Thread: skeletal frog

    by owhite
    Replies
    24
    Views
    1,267

    wow, you guys get to _mill_ things. all I get to...

    wow, you guys get to _mill_ things. all I get to do is cut them with a boring old laser. :)

    read: I dont have any experience with machining brass.

    owen
  25. Thread: skeletal frog

    by owhite
    Replies
    24
    Views
    1,267

    note: there are bends in the some of the parts....

    note: there are bends in the some of the parts. might be an issue depending on how thick material you use.

    o.
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