hey when scaling from 1/8" to 1/4" do I have to scale up or down before I scale it to 1/4" ?

Answer 1

I don't know if I understand you correctly, but when I scale from 1/8 to 1/4, I scale up, because 1/4 is bigger than 1/8

Answer 2

Hi:

First off let start by explain what a scale is: a Scale is a ratio of two sizes . It is way to put something that is too big or too small in the real world to a size that we humans can relate to for example Let say a Saturn V rocket is 309 feet tall to make a 1/12 scale model of it. first we know the real rocket is 309 feet. on our model scale 1inch equal 12 inches or 1 foot so:

309/12 = 25.75 or 25 and 3/4 inches

our scale model of the Saturn V rocket is 25.75 inches or slightly larger then 2 feet tall (actually 2 feet 1 3/4 inches tall)

Somethings are too small in the real world ( like pocket watch gears or electronic parts) So we use a enlarging scale and it written like this 4/ 1 or 1 inch equals 4 inches for example a gear is 1/8" in diameter in the real world would be drawn on a blueprint drawing with the scale 4 to 1 the gear is drawn at 1/2 inch diameter or 4 times it's actual size

1/8 * 4/1 = 4/8= 1/2 inches

the way to remember a scale is what place is the 1 units in relation to the scaling value or division sign or " :" symbol if the 1 is in front of the division sign or ":" symbol your dealing with a reduction factor with means that the model or drawing is going to be smaller than the actual object itself

If the 1 unit is in back of the division or ":" symbol with number greater than 1 in the front your deal with a enlarging factor meaning the drawing is bigger the the actual size of the object itself


Okay let's see what the answer is, for your problem:

let say your measuring a real rod that is 4.7 mm and your scale on a drawing of this rod is 2.5 :1 what is the drawing scale lenght of this rod is:

rule 1: where is the 1 in relation to the scale value?

answer: behind it. So we are dealing with a enlargement drawing

So set the problem as follows:

4.7 *2.5 = 11.75 mm

The drawing scale measured rod lenght is 11.75 mm or the rod lenght on the drawing is 11.75 mm



in your case : (1/4) / (1/8) = 1/4 * 8/1 = 2

so multiply any 1/8 scale value by 2 to get the 1/4 scale value

or multiply the 1/4 scale value by 1/2 to get the 1/8 scale value

that will do what you want

Hope this helps

Answer 3

Your question is a little vague as to exactly what you want but:

1/8" is 96 times smaller then the original object. 1/4" is 48 times smaller then the original object.

So changing from 1/8" to 1/4" you would have to scale down by 2 times. Or divide by one half.

For example if I have a detail on an AutoCAD drawing that is at 1/8" scale and need to put it on another AutoCAD drawing that is at 1/4" scale (each seperate drawing is done in 1 to 1) then I would have to scale it by a factor of 1/2.

This is the kind of stuff I am doing right now. I'm working with a 3" and 1 1/2" drawing. Taking something from the 1.5" drawing to the 3" drawing requires reducing the size of it by half.

Answer 4

You would scale up,1/4 is twice as big as 1/8.

Answer 5

1/8" directly scales up to 1/4". There is no up or down before you actually figure the scale.

Answer 6

Your finished drawing, model, etc. will have twice the linear dimension after the scaling as before.

If the original obejct that is being scaled is 80 feet long, the representation of it at 1/8" scale is 10 inches long. At 1/4" scale the representation will be 20 inches long.

Answer 7

You don't have to scale anything up or down before you scale it up, just do the math and it will work for you.

Answer 8

You have to scale up.