We are contemplating the use of Metric Units in 2007.8 DxDesigner. Are there any issues with using Metric units? We certainly do not want to introduce problems!
Well, so much for using this forum to answer a simple question!
I ended up opening an SR to get the answer, which is exactly what I was trying to avoid.
I didn't believe an SR would be necessary for this.
Given the lack of response the SR route was the correct approach. I have vast experience using DxDesigner with PADS in metric units but am unfamiliar with the strict DxDesigner or Expedition flows and therefore was hesitant to give any recommendations. The following may or may not be helpful for your needs.
Thanks for the additional information. Your response to an earlier post stated that the same old bugs from 5 years ago still existed. That is what prompted me to ask the qustion.
I was assured by Mentor that there were no problems using Metric Units in DxDesigner with CES and Expedition.
Technically there should be no issues with using metric in DxDesigner with Expedition, the use of metric settings in DxDesigner does not influence Expedition and vice-versa.
However, there are a number of caveats which are listed in the release notes and I will re-iterate them here.
To support metric grids/settings in DxDesigner we have increased the resolution of the database, this increased resolution has a direct effect on the symbol definition. There is a new setting in the Symbol Editor: Precision - High or Backward Compatible. For true metric grids this will need to be set to High Precision; symbols written in this format will not be backward compatible with earlier versions of the tools, if you need to support earlier versions of the tools then you will need to use Backward Compatible mode or have two libraries. In Backward Compatible mode the metric grid is written in multiples of 0.01" resolution (2.54mm, 3.08mm etc), the lowest resolution supported by DxDesigner in the earlier versions.
If you use DMS it does not currently support High Precision symbols and you should stay on imperial units (DMS will support High Precision in a future near term release).
The Symbol Wizard also does not support High Precision in EE2007.8, again this will support the new resolution in a future near term release.
If you set DxDesigner up for metric grids then you may well have to modify your symbols to work with the new grid, moving pins onto the new grid settings in the symbol editor.
P.S. Sorry for the late response.
Thank You for your input. I saw the precision property in the symbol editor and did not fully understand it's meaning.
This is valuable information to know and I appreciate it.
And what units are used now to store new symbol data? Micrometers? Nanometers? Or it's still in inches, a small fractions of inches?
The tool uses database units which are dimensionless, the resolution of the database goes down to 0.00001mm.
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