I have set up for the tolerance of a somewhat simple system using the temperature ranges in a multiconfiguration table. I am getting the error message that TRAD cannot be used in multiconfiguration tolerance analysis with no explanation or corrective actions. I want to include the lens manufacturers ROC tolerance in the analysis and I don’t recall running into this problem previously. Is there a workaround for this error?
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Tolerancing ROC in multiconfiguration (temperature) model
Best answer by MichaelH
Hi Allen,
The message you should get says “Tol operand TRAD x is invalid. Under multi-configuration control”:
This is explaining the error, namely that you’re trying to change the radius for a certain surface with TRAD (this changes the LDE) but that radius is already under multi-config control with CRVT. So rather than use the TRAD operand, you will need to use TMCO to tolerance the CRVT operand in Config 1 (and then the thermal pickups will calculate the change in curvature as a function of temperature). The one thing you need to make sure if you convert the radius tolerance to a curvature tolerance to use TMCO:
+2Hi Allen,
The message you should get says “Tol operand TRAD x is invalid. Under multi-configuration control”:
This is explaining the error, namely that you’re trying to change the radius for a certain surface with TRAD (this changes the LDE) but that radius is already under multi-config control with CRVT. So rather than use the TRAD operand, you will need to use TMCO to tolerance the CRVT operand in Config 1 (and then the thermal pickups will calculate the change in curvature as a function of temperature). The one thing you need to make sure if you convert the radius tolerance to a curvature tolerance to use TMCO:
Thanks Michael! That is exactly what I was looking for. I knew there was a way to do this. But, I could not find anything in the Manual, the Knowledge Base, or the references. Thanks!
-Allen
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