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  1. remlap

    Intrinsically Safe CAN J1939 ??

    Hi all, Does anyone have any experience using SAE J1939 on intrinsically safe equipment, e.g. for underground mining? Some have suggested that its near impossible to get J1939 IS certified, but I know that a lot of mining equipment use it... What's the solution? Thanks, Ray
  2. remlap

    Which resonant point is more dangerous?

    Hi! Sorry, another fundamental mech question from an elec eng, but you guys are just SO helpful!! If I have a sinusoidal sweep results graph that shows a 10dB resonance at 35Hz and another 10dB resonance at 250Hz, at which frequency should I do my sinusoidal endurance test? Thanks. Ray (Japan)
  3. remlap

    Vibration Mounts: Nat. freq. Vs Displacement

    This question is from an electrical engineer, so I apologise is I'm missing some fundamental knowledge... 1. Given a graph of "force vs displacement" for a particular anti-vibration mount, is it possible to determine its natural frequency? 2. If two mounts have similar "force vs...

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