i am doing a notebook driven part modeling in creo...In it i have some parameter driven by formulas and the results were been display by 3 decimal precision... is there a way to increase the presision of the output parameter....
This thread is inactive and closed by the PTC Community Management Team. If you would like to provide a reply and re-open this thread, please notify the moderator and reference the thread. You may also use "Start a topic" button to ask a new question. Please be sure to include what version of the PTC product you are using so another community member knowledgeable about your version may be able to assist.
Precision of specific values is problematic in many instances. Sometimes it accepts a nice 13 digit number... other times only 5... and then sometimes they truncate to whatever the decimal pace settings is... and then, some dialogs truncate to 3 digits. So the question really belongs to the operation you are expecting greater precision in.
I have asked customer support about internal precision of gear ratios at one time. I got a lot of different answers but in the end, even a simple ration of 1:3 truncates to 5 digits, including the 1 before the decimal. This is ridiculous for a mechanism analysis.
If you want to get to the bottom of this, I suggest you also file a support case to understand what you are really looking at.
I have also looked at equation curves with regard to precision. In working with an involute curve, I noticed that the starting end's tangency angle would vary significantly with the setting of my part accuracy. The default would yield a starting tangency angle at 3.x degrees! This should be nearly 0 in a perfect system, but even with extreme accuracy set, the best I could accomplish is somewhere around 1/2 degree.
I love using geometry to do, or provide the math behind it. However, I find myself questioning the results time and time again. So when something seems strange, I create a support case to better understand why I am seeing what I am seeing. Cumulative error in Creo is a huge issue.