Offset Distance pls help

[jempot08]

Hello Good day! im glad i found this forum and im going to ask my very question about here and its about Offset, first i need to create a multiple offset for my polyline which has 2.5 distance.

 

the problem is if i directly enter the value of 2.5, i get the distance of 3.54, i wanted to know if how am i going to have 2.5 distance consistently

 

Thank you so much! i hope u guys can help me. check this image file

 

[MSasu]

I'm afraid you made a confusion; for the sloped line will need to measure the distance from base to offested copy on perpendicular!

2.5 * sin 45 = 3.5355

 

And not last, welcome to the Forum!

[jempot08]

you mean, first i need to offset my polyline to Per then 2.5? im really sorry but i dont understand

[MSasu]

I don't think there is something wrong with the way you constructed that; is just the way you measured. The offset is a parallel copy, so the distance is applied perpendicular on base entity:

[jempot08]

Ohh okay.. but is there a way that the distance will not going to change if its offseted? coz according to my handbook, i need to have a distance of 2.5 for both x,y thank you so much sir!

[MSasu]

To get a horizontal/vertical distance of 2.5 you will need to either do an offset at 1.767766953 units (2.5 * sin 45) or, take advantage that the line is at 45 degrees and make a regular copy with a 2.5 units displacement on horizontal.

[MSasu]

the distance will not going to change if its offseted?

The distance is not changing at all; is just that you not measure it the way it was applied!

[JD Mather]

... i need to have a distance of 2.5 for both x,y thank you so much sir!

 

Try Offset with the Through option and select a point at (2.5,2.5).

It is probably a good idea to take a class on trigonometry before getting into CAD (or at the same time and use the CAD to verify the trig, that is what I did when homeschooling my daughter).

 

[BIGAL]

A slight variation on JD Mather answer draw a line hor 2.5 long, when asked for offset, pick end of line, then "Perp" pick angle line this will be correct offset distance.

 

Hint 2 draw line hor or vert a distance pick point make sure F8 is on "Ortho" option drag your mouse up or across then type distance line appears.