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  1. daveh55et

    Mercedes and synthetic oil question

    A couple of additional notes: Once the warning comes up it stays up until a shutdown and restart. It also doesn't come on at idle but instead during normal driving. Finally the message completely obliterates the mileage information. And I'd aslo wager that if the wire was disconnected there...
  2. daveh55et

    Mercedes and synthetic oil question

    Just FYI to close this out, I had it changed to non synthetic and all is well. They checked the oil pressure on the synthetic, it was fine. <shrug>
  3. daveh55et

    Mercedes and synthetic oil question

    I have a problem/question about the use of synthetic oil in an slightly older Mercedes. My father in-law has a 1997 E320, v6, bought used at 111K miles. It now has about 117K miles and last summer the "Low oil" warning started coming on even though the oil as checked manually was fine. He...
  4. daveh55et

    Heat transfer question - ice on windshield

    My thoughts are that in a few minutes the engine has heated the engine compartment and the washer fluid to well above freezing, and if the windshield is still so cold and freezes the fluid, the wind sublimates the ice very quickly.
  5. daveh55et

    hard time understanding management

    I pretty much agree with everyone. I'd suggest using a response like "I'm just about done with X, do you have something available for me to work on?".
  6. daveh55et

    The proverbial guy who steals the show at the end of the project

    Yes this is very common as has been noted. IMO it's partially the result of the real project manager not keeping everyone including other managers and people on their own team with information. This has already been touched on but I'll give my take. The real project manager should publish...
  7. daveh55et

    Permanent Magnet Adhesive

    "supermagnetman" George Mizzel has a video on youtube where he makes a stacked pyramid magnet of 1T. YMMV. http://www.youtube.com/watch?v=tR_8f0DYK5s His site: http://www.supermagnetman.net/index.php
  8. daveh55et

    antiwater seal for high speed motor:11000rpm

    What are the torque requirements? Maybe a totally sealed magnetic coupling would work.
  9. daveh55et

    Reposted: How do know what the customer REALLY wants

    +1 for what CajunCenturion said. As mentioned one difficulty is that you need to be given the proper time to really understand what's trying to be done, especially if it is a legacy system. Prototyping helps quite a bit, even if it's just pencil drawings on paper. Even better of course if if...
  10. daveh55et

    Electromagnets capability of repulsion.

    The wikipedia entry lists a high frequency AC levitation of AL directly, no magnets needed, maybe that might work better.
  11. daveh55et

    First Time Review, Ask For Raise

    If you are in a secluded backwater part of the company as you describe, consider moving on regardless of a raise.
  12. daveh55et

    Throwing around an idea

    I think you would have to use metal just because of the forces involved. The tricky part would be assembly with magnets that big. If you used three magnets you could put the bottom two held close in repulsion, then some kind of switch, lever arrangement to release the middle one and give you...
  13. daveh55et

    Using Neodymium Magnets with N to N poles for a long period of time.

    Maybe a Hall Effect sensor would be more reliable.
  14. daveh55et

    &quot;treasure&quot; hutning magnet questions

    Ok, I see what you're saying now. I'll see what I can do with regards to providing an image. Thanks.
  15. daveh55et

    &quot;treasure&quot; hutning magnet questions

    Right, which is why I was asking about pole pieces on the faces, and if that would focus the field and allow a greater penetration.
  16. daveh55et

    &quot;treasure&quot; hutning magnet questions

    A 2 inch object 3 inches down would be a pretty good representative case. I would not think though the sand would lift as one cohesive unit, I would expect the item to sift through to at least some extent. Which brings me to a slightly different question from my first post, would pole pieces...
  17. daveh55et

    &quot;treasure&quot; hutning magnet questions

    hmmm, Ok let me say the following: - I'm not after engine blocks, just various trinkets so I don't think I'll need a crane. - Regarding what I assume is a concern about corrosion, I likely will Plasti-dip the whole thing before using. - Furballs, yep, already thought of that. I'll probably...
  18. daveh55et

    &quot;treasure&quot; hutning magnet questions

    I apologize if these are trivial questions. I have several books on order including Moskowitz. I live in a tourist town with rocky beaches. I'm interested in using magnet assemblies for "treasure hunting". I expect to attach a line to the assemblies and drag them along a beach or from a pier...
  19. daveh55et

    fun tricks with rare earth magnets

    Search youtube for rare earth magnet video. Interesting motors and demonstations, also see http://www.coolmagnetman.com/magindex.htm

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