Scale Calculation

[pwillia3]

Does anyone know what the calculation is to get the scale when creating a general view on a drawing? I know it has something to do with the solid size but I am just not figuring it out. The scale I'm after is the one in the properties dialog when you select a general view. How does ProE calculate that value?

 

[chenivan]

I do not understand what you say?


Please attached a picture !


thank you !

 

[jrobi]

what version are you running? you can set the 'default' scale in you rconfig file.

 

[williaps]

I am running WF2.0 M150. The reason I ask is that I have to calculate the default scale (like Pro does) inorder to create a general view with the detail note for the scale at the bottom of the view. Otherwise I don't have a Pro function to get this scale for me.

 

[jrobi]

the default scale should be displayed at the bottom of your monitor view- also, you can select a 'custom' scale for other views if you want those to vary from the first view placed.

 

[dr_gallup]

If you want to display it in a drawing, the parameter is &scale.

 

[williaps]

I don't think you guys really understand what I'm trying to do. I need to do the scale calculation in code and pass that scale to a function that creates a general view.

 

[Jodster]

I think I understand what you are after ...... here's my interpretation ......


Create your drawing


View attachment 1237


What you see here is the drawing as you create it .....


Length is the name of the dimension from the model (could be d1 if you don't rename it)


Number is the value of the dimension when you create it (let's use 1000)


Scale is set to what you see as the best fit for the drawing.


In the model, here is the relation you have to create (best to be done at the end of the relations so that the size is done calulating)


DRAWING_SCALE_FACTOR=1000 / LENGTH


Hope this helps ......

 

[williaps]

>Length is the name of the dimension from the model (could be d1 if you don't >rename it)


Length = d1 (I will use the dimension d1 in the assembly)


>Number is the value of the dimension when you create it (let's use 1000)


So the value of d1 in the assembly is 1000 correct? NUMBER=1000.


>Scale is set to what you see as the best fit for the drawing.


I am using C size sheets. Pro gives the sheet a default scale so I will be using that.


>In the model, here is the relation you have to create (best to be done at the end >of the relations so that the size is done calulating)


I don't want to create a relation in the model I just want to calculate the scale.


>DRAWING_SCALE_FACTOR=1000 / LENGTH


So the formula is DRAWING_SCALE_FACTOR = NUMBER/NUMBER ? That doesn't make sense. Where did you get 1000 and what is the value for LENGTH in your formula?
Edited by: williaps

 

[Jodster]

Sorry ..... this is not particularly easy to explain.


DRAWING_SCALE_FACTOR=1000 / LENGTH


1000 is from the drawing. It is the dimension at the time the drawing was created. The assumption is that this value will change based on a change in the design. So for the next design it may be 2000 ..... and so on. But the key to this is that you've created the drawing and set the scale and the view is the correct proportion on the sheet.


LENGTH..... at the time that you create the drawing the value for length is 1000. Length can be a parameter/dimension symbol ect. At the time that you create the drawing the value for DRAWING_SCALE_FACTOR will be equal to 1.0


So ..... at the time of creation, DRAWING_SCALE_FACTOR = 1.0. This become a multiplier for the drawing scale. Going to our example, the drawing scale = 0.04 and the DRAWING_SCALE_FACTOR = 1.0. If we change the parameter LENGTH to 2000, the value for DRAWING_SCALE_FACTOR = 0.5 and when you open the drawing the drawing scale become 0.02, thus rescaling the view to fit the sheet.


Hope I am clearing things up ..... I'll keep watching if there is any more questions.

 

[dr_gallup]

I think the dimension that Pro/E uses for the model size is the bounding box diagonal. You can get that from Info/Model Size. I don't know how it uses that and the page size to compute scale. It is only a rough approximation anyway since it can vary greatly depending on the aspect ratio of the model.