Job preferences - Units and formats/structure dimensions - Best settings? Affect accuracy?

[skellyRSA2023]

Hi, 

in relation to setting up a model within Robot. Do the job preferences/Units and formats/zero format affect the accuracy of models? i have some questions which if anyone has answers to or comments from there own experience it would be most appreciated. Also see the attached pdf. 

1. In job preferences/Units and formats/zero format - what should this actually be set to in decimal points for accurate results and least issues with accuracy within the model? Does zero format affect the accuracy of the model at all when snapping to a point? or is this irrelevant and only thing that affects this is Analysis type/Structure model/tolerances?

2. Should job preferences/Units and formats/structure dimension match the same decimal points placing as zero format as per point one above? 

3. What are the best settings for all the mentioned in point 1 i.e. zero format, structure dimensions, and tolerances?

4. if using a dwg. drawing as a reference should the zero format match the accuracy of the dwg. file units? i.e. if imported in mm should the zero format be set to 0.000m etc. or maybe this is irrelevant? 

Any help would be appreciated. 

Thanks, 

S. 

[Krzysztof_Wasik · Accepted solution]

Hi @skellyRSA2023 

Regarding your questions

1. In job preferences/Units and formats/zero format - what should this actually be set to in decimal points for accurate results and least issues with accuracy within the model? Does zero format affect the accuracy of the model at all when snapping to a point? or is this irrelevant and only thing that affects this is Analysis type/Structure model/tolerances?

Ad1. Zero format is used for coordinates and results presentation to distinguish zero and small non zero values.

Program recognizes small values, below selected accuracy. After accuracy increasing proper non zero value appears.

2. Should job preferences/Units and formats/structure dimension match the same decimal points placing as zero format as per point one above? 

Ad2 

No it is not necessary

3. What are the best settings for all the mentioned in point 1 i.e. zero format, structure dimensions, and tolerances?

Ad3

It depends on user needs and can be adjusted ad any time.

When table values are copied between cells program recognizes only displayed tolerance and values smaller than presented accuracy are ignored.

When values are typed in table cells, typed number is recognized regardless to accuracy displayed. 

So when you want to copy node coordinates in tables, or contour properties dialogs it is recommended to increase display accuracy.

4. if using a dwg. drawing as a reference should the zero format match the accuracy of the dwg. file units? i.e. if imported in mm should the zero format be set to 0.000m etc. or maybe this is irrelevant? 

Ad4

Zero format does not have any influence on imported dwg coordinates.

While DWG import non zero values are recognized even if they are smaller than presented accuracy.

If zero format is set to "0" non zero values are presented as 0.0 when accuracy is set to one digit after period.

When accuracy is increased precise value is presented.

As you see on screenshot above default accuracy of DWG import is 4 digits after period.

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