Temperature Compensation

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  • Temperature Compensation

    Does anyone use a Sheffild machine with a MP-30 controller & PC DMIS software? And If so how did you get you'r part thermister to work for temp comp? All the machine thermisters seem to work fine.

  • #2
    No I do not. But I have a lot of experience with supposed temp comp. I never saw these thermo couples work right. The problem is that they only correct for linear errors and when temperature changes, you machine does not only linearly expand, it bends too. These angular errors completely everwhelm any of the good that the sensors give you linearly. My advice: do NOT use it! The only sure way out is to get your room at 68 degrees.

    Sorry, not much help. But I am talking from long and bad experience here. If anything, be very very careful with temp comp!



    Jan
    ***************************
    PC-DMIS/NC 2010MR3; 15 December 2010; running on 18 machine tools.
    Romer Infinite; PC-DMIS 2010 MR3; 15 December 2010.

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    • #3
      I am talking about using a thermister on a part to compensate for the temperature variation of a part using a material co-efficient formula.
      Working with large parts the expension factor is very large.

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