Scale

Hello all!

I need to edit a drawing made by another person. But when I make changes, the measurements don't seem on an equal level.

The drawing was made in 1/8 scale. I assume I'm not working in the same scale as the drawing? How could I check this? Or change it into the same scale?

I hope I'm being somewhat clear.

TIA

GL

What makes you think there is a problem? When you draw a line of a particular length is it longer or shorter than you expected it to be?

Well I'm looking at a drawing of a pipe with a hole in it. I need to move the hole over 2 inches. When I move it, the measurement says it moved by about 8 inches. I was thinking it might be because I'm not working in the same scale as the drawing.

Oh, and I'm using cad 2000i.

Do you think it was drawn in full scale (as is normal for modelspace)?

It sounds like you might was to check the primary units scale settings on the dimension type used, to see if there's a 4.0 in the "measurement scale" setting instead of 1.0

Just curiousity so humor me.

Is there a title block and border on the sheet? If so, can you measure the distance between the left and right borders? What is it?

The hole is at 31.375

I move it over by 2

Now the measurement says it's 4.9159

instead of 33.375

This is why I thought I might be in the wrong scale?

It says 15.00 ReMark

Something doesn't sound right.

You say the drawing is 1/8"=1'-0" scale correct?

Previously you said when you moved a hole 2" AutoCAD said it was more like 8". Now you say when you repeat the action it's more like 4.9" instead. How did you arrive at these numbers?

Have you tried printing out a portion of the drawing at 1/8" scale and measuring with an architect's scale a line of a known length to see what you get?

measurement.. by that you mean dimension line, right?

Check your dimension measurement scale (primary units) to see if it's 1.0 or some other number.

I believe Mike is referring to DimStyle > Primary Units tab > Measurement scale (left hand side near the bottom). What is the scale factor set to?

I have a space on top called dimension style control. In the box, it says

"Scale 4_DEC3" When I open the drawing.

If I measure a line, using my dimension line command. It gives me a number that differs from the drawing.

If I then change to "Scale 8_DEC3" The dimension line command gives me the same measurement as in the drawing. But then I try to change a few things in the drawing, and they move WAY out of proportion.

Please do not "measure" anything using dimension line commands.

Use the Distance command. Use Osnaps to accurately pick geometry (endpoints, midpoints, intersections, etc.).

Find one line or piece of geometry that has a dimension on it already. Using the Distance command and picking endpoints measure the length of the line. Look at your command line. What does AutoCAD report back to you as this line's length? How does this compare to the dimension that you see on the drawing?

Using the Distance command, I click on the first point. Then it promps for the second point, but when I click it the command disappears and nothing is in the command line.

Sorry

Oh I see now, my command line needed more space.

OK so using the distance command, I measured a line that "says" it's 23.375"

But the command line says it's 2.9219

OK so using the distance command, I measured a line that "says" it's 23.375"

But the command line says it's 2.9219

Not to butt in here, but I'd like to see how this turns out. I just divided 23.375 by 2.9219 and it comes out 7.9999etc. Round that off and that's an 8. I'm thinking you need to move that hole over 1/4".

Drawing should have been drawn in real world.

Not to butt in here, but I'd like to see how this turns out. I just divided 23.375 by 2.9219 and it comes out 7.9999etc. Round that off and that's an 8. I'm thinking you need to move that hole over 1/4".

Drawing should have been drawn in real world.

Humm

I moved it over .25

Then I set my DIM style control to 8

It measures out at 33.375, which is what I wanted.

Then using the DIST command. It says 4.1659

Humm

I moved it over .25

Then I set my DIM style control to 8

It measures out at 33.375, which is what I wanted.

Then using the DIST command. It says 4.1659

I'm not sure what you are trying to say. 33.375 divided by 4.1659 is 8. To me that say's the distance of 33.375 at 1/8th scale is 4.1659.

I think that's what you want. Maybe I'm missing the real question here. To me it looks like you're good to go.

So by multiplying my needed space by .125, I can move my parts around in the drawing at a ratio of 1/8. Seems like it will work, but does autocad not have some function to change the drawing to real world? Maybe I'm just being foolish sorry, I don't have much experience.

Thank-you all for your help!!

So by multiplying my needed space by .125, I can move my parts around in the drawing at a ratio of 1/8. Seems like it will work, but does autocad not have some function to change the drawing to real world? Maybe I'm just being foolish sorry, I don't have much experience.

Thank-you all for your help!!

Nothing foolish here, it's all good. These guys know their stuff and are glad to help, so don't worry. We all learn from things like this. And besides, it's the beginners area.

I'm not sure about any quick command, but you could scale the drawing up to real world. Let's say you have a real world length somewhere on that drawing of 1" and the distance command measures it out to 1/8". What I have done in the past is to snap a line to one end of that 1" part, offset the line 1" and then do scale, reference, pick and endpoint of the first line, then pick the same endpoint of the second line. Make sure you are scaling up the entire drawing, but not the line you offset. Sounds lengthy, but it's not really. The others might have a quicker way, but this is how I've done it. I leave here now, so I'll check back tomorrow.

...change the drawing to real world

I would scale the drawing to get to 1:1 and quit fooling with scales.