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  1. Replies
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    I like a strong air assist for cutting. I use a...

    I like a strong air assist for cutting. I use a Gast 71R.

    To control the pressure I have the output of the compressor going into a tee fitting. After one leg of the tee is a ball valve and a...
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    2,155

    I have cut those things before. They cut okay....

    I have cut those things before. They cut okay. Make sure that they are not PVC.
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    4,866

    I've never heard anything good about Full...

    I've never heard anything good about Full Spectrum.

    Rabbit customers seem happy, and Thunder seems to have a good rep too.

    Stay away from eBay machines, Glowforge too.
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    The max size for a single file is 50 GB, of...

    The max size for a single file is 50 GB, of course you need to have an account that supports that much space, the free accounts are limited to 2GB.

    I have 5GB available that you are welcome to use...
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    If there is no charge for the files why not put...

    If there is no charge for the files why not put them up on DropBox (or other cloud storage service)? You could password protect the file in order to maintain control of who gets to use it, and you...
  6. 100% power can mean many different things. ...

    100% power can mean many different things.

    Most glass tubes have a max rated power, a max recommended power, and a max recommended power for long life.

    The controller also has a 100% setting...
  7. 15% doesn't mean much to me so I can't say, but I...

    15% doesn't mean much to me so I can't say, but I would expect it to cut maybe just a little slower than Alder. It is been a while since I have cut Alder so I could very easily be wrong about that....
  8. 30 watts can cut baltic birch, not very fast but...

    30 watts can cut baltic birch, not very fast but it shouldn't be a problem.

    I think the Zing uses an air curtain rather than an air-assist, that may have an effect on edge quality.
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    6,115

    Anything is possible. Can't say how much trouble...

    Anything is possible. Can't say how much trouble it would be to swap to a different laser head without knowing more details. It would probably require some amount of fabricating on your part.

    Are...
  10. Unlike some mainstream lasers the only purpose of...

    Unlike some mainstream lasers the only purpose of the blowers on most Chinese lasers is to evacuate the smoke and fumes from the enclosure. Some mainstreams lasers depend upon the blower for also...
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    13,252

    The standard place to mount them is in a hole on...

    The standard place to mount them is in a hole on the machine enclosure near the LCD control panel. Doesn't really matter where, personal preference.

    What does matter, and is extremely important,...
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    I think my Reci 80W is nine years old now. I...

    I think my Reci 80W is nine years old now. I haven't been using it much lately but it appears to be the same as when new. I did test the power a year or so ago and it was still putting out over 80W....
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    Most tubes will have a max tested power, and then...

    Most tubes will have a max tested power, and then there is the recommended max power for long life. The best way to make sure you are not over-driving the tube is to use an ammeter. The controller...
  14. Cutting anything creates toxic gasses, my worst...

    Cutting anything creates toxic gasses, my worst experience is cutting Delrin, absolutely, positively do not breathe that stuff.

    Lots of plywood can be laser cut.

    Baltic Birch ply is a favorite,...
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    13,252

    Baltic Birch doesn't really engrave very dark....

    Baltic Birch doesn't really engrave very dark. Someone makes a product that you spray on to darken it up - never used myself.
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    I prefer the airflow on the side, I've never had...

    I prefer the airflow on the side, I've never had an issue with the lens getting too hot. My lens stays cleaner now without the cone than before. Somehow the swirling vortex of air inside the cone...
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    20 - 30mm sec cutting 3mm is not low speed. You...

    20 - 30mm sec cutting 3mm is not low speed. You have a cut test where you set the lowest speed to 50 mm/sec and the top speed to 500 mm/sec.

    Those speeds are engraving speeds, not cutting speeds....
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    I can't tell you if it is "good way" but this is...

    I can't tell you if it is "good way" but this is what I did, and it has not given me any problems.

    I stripped about half inch of insulation from each side and soldered it together in a lap joint....
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    That is a good indication that it is not the tube.

    That is a good indication that it is not the tube.
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    Pretty sure the same thing happens when the tube...

    Pretty sure the same thing happens when the tube goes bad.

    If you watch the tube while firing it can give you a clue.
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    I've also run my machine at 1,000 mm/sec, but 800...

    I've also run my machine at 1,000 mm/sec, but 800 mm/sec was the fastest reliable speed where it would never miss a step. Way too fast for good engraving though. Too many stray dots.

    200 - 400...
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    Two points about hybrid servos; First, the...

    Two points about hybrid servos;

    First, the ones that I have seen are not actually servos, they are steppers with encoders on them. No speed advantage there that I am aware of, and I am skeptical...
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    Doesn't matter one bit. In fact it makes much...

    Doesn't matter one bit. In fact it makes much more sense to post in the same thread.

    It makes no sense to me to start a new thread on an old topic, better to add to the thread and keep the...
  24. Thread: Bad tube?

    by Rich Harman
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    2,655

    If you want to see the beam profile take a piece...

    If you want to see the beam profile take a piece of clear acrylic, the thicker the better, and place it in the beam path far enough away from the output of the tube to avoid getting the window dirty...
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    I don't have an RD file but lots of Chinese...

    I don't have an RD file but lots of Chinese machines can do 3D engraving. On the Ruida controllers it is called "Output Direct" - you set min and max power values and the software will adjust the...
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