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  1. PeteSpear

    Breaking Torque

    Thanks for the suggestions guys, I have at least 6 rollers all with unknown weight and unknown construction - they're almost certainly hollow but I have no way of knowing (even if I were to weigh them) how the weight is distributed so calculate their inertia. Hence the reason I am asking for an...
  2. PeteSpear

    Breaking Torque

    Thanks Jraef, To answer a few questions, I believe the start up time is around 3 seconds but they want to stop 'instantly' (their words not mine). The line has relatively low speed rollers so 'instantly' could reasonably be interpreted as 0.1 second - at least this is what I will aim for and...
  3. PeteSpear

    Breaking Torque

    As you say the power required to accelerate the line will be 'more' than that to stop it due to frictional losses. We also know he line stops considerably faster with product on it as it needs to do work to drive the product through. It would be possible to get an idea of the frictional losses...
  4. PeteSpear

    Breaking Torque

    Oh, and yes, that should be 'Braking Torque@ ...
  5. PeteSpear

    Breaking Torque

    A customer has asked me about calculating torque for brakes on a fly wheel to use in E-stop situation. They have no idea of the breaking torque required. At present the E-stop requires approx 5 seconds to stop machine while a controlled stop (using ramp down on motor drive) is around 2 - 3...

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