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  1. Not so sure, The earlier posts pretty much...

    Not so sure, The earlier posts pretty much covered most aspects of whats needed.

    Socrates was a troubled soul so maybe not a good aim for the thread. Besides, the 'Dialog' has no value unless ...
  2. Epoxy sticking to Epoxy?

    Seems Epoxy doesn't stick to Epoxy? Have to disagree. It works fine, as long as the material is used to its strengths. If you disagree you might want to worry next time you get on a 777.

    As...
  3. Cameron. So called reactive dilutants are after...

    Cameron. So called reactive dilutants are after my time really so I can't decently comment from first hand.

    So, this is probably totally wrong but I'm confused. If they are really using glycidyl...
  4. Thinning Epoxy

    OK - this is going back a long way since I seriously worked with this stuff but Thinning Epoxy is a hugely controversial subject that needs to be understood if anyone wants a strong result.

    Any...
  5. Toughness

    Quick comment on 'toughness' as it was applied to the idea of increasing epoxy's toughness by adding resilient rubber or similar compounds.

    I get a completely different read on the issue; the...
  6. Hi Larry, been busy... :) This thread has...

    Hi Larry, been busy... :) This thread has developed an interesting character.

    Language and technology; Maybe engineering is taught differently over here but my schooling emphasised keeping...
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    Look up Euler's Formula. Basically the critical...

    Look up Euler's Formula. Basically the critical buckling load (beyond elastic limit) for a vertical column is;

    Fcr=(ExIxPi^2)/L^2

    Where;
    Fcr=critical force or load,
    E=youngs modulus for...
  8. Conversations moved back to degassing and vacuum?...

    Conversations moved back to degassing and vacuum?

    So, Why not approach it from the other direction - just don't get gas in there in the first place.

    Use the standard cascade mixers to mix...
  9. To add to Phils post, the isolation occurs inside...

    To add to Phils post, the isolation occurs inside the drive. The pc port(s) connect to the drive, usually via a breakout board but not necessarily requires, the 5v coming from the pc or a seperate...
  10. Phil's spot on as usual. I use exactly as he...

    Phil's spot on as usual. I use exactly as he suggested with IM483 8P and 34 drives..

    As Stepper monkey suggests the step dir and enable sink the opto 5v to earth through the interface / breakout...
  11. Entirely correct. However in materials which...

    Entirely correct.

    However in materials which have a limited tensile strength, if the design for a beam produces static deflection sufficient to 'use up' the limited tensile strength available...
  12. This is an excellent point and reminds me of an...

    This is an excellent point and reminds me of an idea, you might want to consider lining the mold with a layer of epoxy and structural ( E or S ) glass before a big e/g pour. Does nothing in...
  13. Entirely reasonable, unless 'another technical...

    Entirely reasonable, unless 'another technical viewpoint' is to agree with the entire pro super e/g solution.

    If you'd care to read the earlier in the thread again you'll see my viewpoint. If...
  14. Using E/G

    Again in all the excitement it seems from reading here the actual use of the material and design of machines using this stuff have dropped off the thread?

    The benefits of E/G where posted way...
  15. just in case;

    in case it's passed people in the excitement;

    Silanes are dangerous just reading the MDS. Commercial use is heavily controlled. nasty stuff you don't want in your house.

    Carbon Black is a...
  16. Spherical Aggregate?

    OK, so I'm not often watching this thread, but where did the obsession for sperical aggregate come from? I assume it's because there's some papers on spherical packing? Isn't that missing something?...
  17. While I'm sure your efforts are appreciated,...

    While I'm sure your efforts are appreciated, rather than speculative suggestions I'd think it would be more appropriate to publish your own results?

    Personally I'd be concerned if my personally...
  18. Pragmatic; (ADJ) to deal with the facts, actual...

    Pragmatic; (ADJ) to deal with the facts, actual occurance in a practical manner....
  19. haven't been following the thread recently, got...

    haven't been following the thread recently, got pm from cameron and another member who suggested I had a look, I'll have a go at answering the questions. This is of course entirely my opinion, you...
  20. Mostly correct - but the E/G will only have an...

    Mostly correct - but the E/G will only have an effect if the box does deform. If you take larry's example, adding E/G will have an effect only if compression of the core occurs - and even then it's...
  21. Heck no! , or rather there's definetly a question...

    Heck no! , or rather there's definetly a question of what the numbers actually are. They are an order or more less than steel certainly and, No, comp and tensile are not the same for E/G, but...
  22. Now there's a good idea.... I'll have to go find...

    Now there's a good idea.... I'll have to go find this paper..
  23. Twisting forces are somewhat different from a...

    Twisting forces are somewhat different from a simple deflection. Twisting starts introducing such nasty things as warping shear stress and warping moment and the assumption the sections might change...
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    Poll: I said none for the simple fact that we produce...

    I said none for the simple fact that we produce it by merely breathing.. net net we haven't reduced co2 by sequestering anything. Do I win a prize?

    made me think though, if we're to reduce co2...
  25. Hey Larry - we did this ages ago :) You can use...

    Hey Larry - we did this ages ago :) You can use the spread sheet from post #5 http://www.cnczone.com/forums/showthread.php?t=14227.

    Ckelloug - Please write something to calculate this properly....
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