Judge the scale in Model Space in Auto CAD

[CAD<LIFE]

How can I know all the parts designed in model space are to scale of 1:1 in AutoCAD

i.e.
I am designing a pressure vessel where I need to drag parts from different drawing. I have scaled them all to 1:1 onto model space
but parts donot seem to fix so I need to know if the scale is to 1:1 or not
I have scaled them by selcting all part and than scale and typed in value 1.

Any ideas greatly appreciated

[dbroada]

you cannot guess. You must have a reference dimension somewhere to base it on. It is a big concern when you pull in a manufacturers cad file for an item you know nothing about. If it looks right it probably is but if it doesn't look right you may have a problem.

[riga]

I have scaled them by selcting all part and than scale and typed in value 1.

Any ideas greatly appreciated

That operation you have made will not bring your objects to a scale 1:1, it will only scale your selection of a factor of 1, wich mean that your selection will just remain the same as it was before.
As Dave said, you really NEED a reference and then scale the rest on the base of that reference (hoping that the other operator did not used more scales in model space, like old school's cad operators do).

[Bespoke]

Some times when you down load drawings by others you may find that they have been drawn to scale so as well as noting what Dave and Rega have to say double check the original scale.

I mention this as it happens a lot in my trade I think they do it just to check that you are on the ball. If only I could get my hands on the guy who produces some of the drawings for Marley I would smack his legs very hard.

[CAD<LIFE]

Some times when you down load drawings by others you may find that they have been drawn to scale so as well as noting what Dave and Rega have to say double check the original scale.

Double Check the original Scale - How u suggest I should do that ??

Uptil now I have scale the oject 1 by right clicking and seecting scale. I hvn't got the similar drawing for refrence.

[Bespoke]

31/05/2007 8:14 AM GMT

Morning CAD<LIFE

Check out the two attached drawings and you will see a scale of 1:10 if you insert this has is it is it will be a 10th of the size so you need the rescale the object. You will also see it shows one or two dims so you can check this when you rescale. As Dave as said you need a ref point and these dims give you that ref point do they not?

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I hope this helps if not a lot.

[mhoward_GTC]

Double Check the original Scale - How u suggest I should do that ??

Uptil now I have scale the oject 1 by right clicking and seecting scale. I hvn't got the similar drawing for refrence.

Is there any part of the drawing that you know what the dimension should be? If so, use the distance command to see what size that part is drawn to. For example, you know a fitting should be 12", but it measures 8.4", then you know the drawing is not 1:1 scale.

Use that part as the reference dimension and use the the "reference" option of the scale command to scale up (or down) the entire drawing. Hope this helps...

[CADken]

this is why i only draw at 1:1 scale in model space.. i never understood people that drew things at a scale in modelspace...

and as said before, selecting and object and then scaling it to "1" does nothing but keep it to it's orginial shape.

[Bespoke]

How about we find someone to design a set of stocks and then a good carpenter to make them and when we find these very silly individuals who seem draw to scale in model space, we can put them in the stocks a pelt them with all the rotten fruit and veg we can find.

[CAD<LIFE]

THNKS GUYS FOR EVERTHING
I mean all the adcvices.

Yes I trid to dimension them and they were not at 1:1 scale as the dimensions of the drawing did not match to the pdf version of the dawing.
Than by trial and error i was able to scale it to the required parts.