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  1. chedalb

    how to make the "hole chart" visible??

    I don't know ... it is the same I did, but I do not see how to show the options I need (i.e. washer tailored counterbore).. did you wanted to do the same, dgallup? Did you had a short name for your file names, or loose and long? thanks in advance, Edo
  2. chedalb

    how to make the "hole chart" visible??

    Dear all, we want to add a hole chart with ISO pass through holes with counterbore slots for heads and washers. We placed the attached hole chart in the mounting points, but we can not get it to be visualized.. for sure there is a missing trick, but I do not find specific indications around...
  3. chedalb

    stupid question ... but which GD&T can I reasonably ask or GD&T guidelines

    Thanks KENAT, maybe also due to my non native english, I wandered for some time on the forum without solution.. thanks for spotting out! chedalb .
  4. chedalb

    stupid question ... but which GD&T can I reasonably ask or GD&T guidelines

    Hello Everybody, the question is stupid, the answer is not. I am working for an market where basically it never happens to have the same part twice. Depending on the projects, it happens that we act as procurement office. When dealing with a new part to be manufactured and designed by a third...
  5. chedalb

    driving a piezoelectric element by checking its capacitance

    Dear all, I was somehow sure from by memories that - for static operations - I could correct the hysteresis of a piezoelectric element by measuring its capacitance. Now that I have the problem to correct for hysteresis in an open loop that I can not touch, looking around it seems that my...
  6. chedalb

    how to hook a symbol to a table?

    Dear all, I always did it manually, but I wonder if there is a method a bit more organized: - almost everybody in title blocks needs symbols (e.g. third angle view or first angle view). Or, tables hooked to draft groups(e.g. the scaled rectangle defining the drawing area over a format) - When...
  7. chedalb

    flexible option with @#~¦¦¦ STEP assembly file

    Hello 3DDave: assembly distance quote: when one assembles a component, has different options. Coincident,parallel or distance or whatever. "assembly distance quote" for me is the quote that I create during the process of a "distance" placement in the assembly. I can assign a relation to this...
  8. chedalb

    flexible option with @#~¦¦¦ STEP assembly file

    dear all, I am stupidly stuck into something that most likely is a stupid thing, but I can not get out of the thing. Dear all, I am assemblying an XYZ stage and have to check for different envelope aspects. So, I import the STEP from the linear stage manufacturer, and I assemble the very...
  9. chedalb

    Shock Response Function in Ansys

    Hello Shaun8567, thanks for your detailed analysis, to my understanding your point of view makes very sense. I feel a bit wacky about are: - the combination of the modes, that is still some very large degree of freedom for "choosing" the answer your are looking for. - the fact that the SRS...
  10. chedalb

    Shock Response Function in Ansys

    hello everybody, there have been a number of discussions opened on how to implement the shock response function in Ansys. unfortunately they all appear to be closed without a clear conclusion. on another Ansys forum i find this discussion...
  11. chedalb

    avoiding stupid errors with ceramic material as structural material - some white paper or reference?

    hello Bruce, thanks for this indication about books and guidelines! Edo
  12. chedalb

    avoiding stupid errors with ceramic material as structural material - some white paper or reference?

    Dear all, I have to re-evaluate a thermomechanical concept for a structure and I am inclined to think that Aluminium Nitride is as per datasheet satisfying quite of my requirements (though i have to start doing a thorough analysis). But as I am a "metallic structure" kid I have no experience in...
  13. chedalb

    Kohzu stages accuracy - any information?

    Dear all, I wonder if you have information about the positioning accuracy of Kohzu Precision positioning stages, that is apparently a missing element in their data sheet. The performances on the paper looks rather good, but I just wonder... thanks in advance for your feedback, Edoardo
  14. chedalb

    Lomb Scargle periodogram for large bandwidth signals?

    yep. Correct, IRstuff. and white noise is generated as a train of frequency components by creating the spectrum and then backtransforming it into the time domain and resampling it. as stated also by GregLocock..
  15. chedalb

    Lomb Scargle periodogram for large bandwidth signals?

    hello @IRstuff: as of my understanding and of the documentation I have available and is providing examples, a periodogram is able to identify more than 1 frequency component. @GregLockck: what you indicate is the procedure I followed in order to compare and try to understand the LombScargle...
  16. chedalb

    Lomb Scargle periodogram for large bandwidth signals?

    Dear all, I have to deal with an unevenly sampled time history that is related to a white noise signal. Now, I can not a priori use FFT methods as the uneven sampling is introducing artifacts that hide the real signal. I was thinking about using Lomb Scargle processing. Whereas the...

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