Scaling from full size drawings

Stanier · 7th Nov 2009, 06:00 pm

Can somebody please help me with the following scaling problem when using Autocad 2000. For example, drawing a line relative to a point I would like to be able to enter as the relative coordinates the values taken from an external drawing multiplied by a suitable scaling factor in order to draw the line and then dimension to my scale size. E.g. I would like to be able to enter as the co-ordinates of the second point of the line the following input: @9*0.0885,0 where 0.0885 is my scaling factor for the X co-ordinate of the line but the system will not accept data. Where am I going wrong?
Many thanks

dbroada · 7th Nov 2009, 06:03 pm

why are you drawing at a scale? In AutoCAD you should ALWAYS draw full size.

Stanier · 7th Nov 2009, 06:29 pm

Quote:

Originally Posted by dbroada

why are you drawing at a scale? In AutoCAD you should ALWAYS draw full size.

Hello Dave - The object is to be able to reproduce a drawing in a model makes scale from data extracted from a full size Works drawing.
Rergards

dbroada · 7th Nov 2009, 07:11 pm

why not draw it full size and scale once complete.

I think you might be able to use 'cal to launch the command line calculator but I can't be sure.

alanjt · 7th Nov 2009, 07:25 pm

Quote:

Originally Posted by dbroada

why not draw it full size and scale once complete.

I think you might be able to use 'cal to launch the command line calculator but I can't be sure.

Yeah, 'cal would be the route to take. I think the only math you can do in the commandline as you are doing is divide, since autocad will just treat it as a fraction and approximate a decimal (or whatever your units are) amount. However, as dbroada said, if you MUST draw at something other than 1:1, just draw the entire thing, then scale. Make life as easy as possible for yourself.

Stanier · 8th Nov 2009, 10:48 am

Quote:

Originally Posted by alanjt

Yeah, 'cal would be the route to take. I think the only math you can do in the commandline as you are doing is divide, since autocad will just treat it as a fraction and approximate a decimal (or whatever your units are) amount. However, as dbroada said, if you MUST draw at something other than 1:1, just draw the entire thing, then scale. Make life as easy as possible for yourself.

Hi there - Yes, I now understand that the correct technique is to draw full scale and then apply the scale factor. Thanks to everyone who replied to my query.

7th Nov 2009, 06:00 pm	#1
Stanier Full Member Using: AutoCAD 2000 Join Date: Jan 2009 Posts: 25	Scaling from full size drawings Can somebody please help me with the following scaling problem when using Autocad 2000. For example, drawing a line relative to a point I would like to be able to enter as the relative coordinates the values taken from an external drawing multiplied by a suitable scaling factor in order to draw the line and then dimension to my scale size. E.g. I would like to be able to enter as the co-ordinates of the second point of the line the following input: @9*0.0885,0 where 0.0885 is my scaling factor for the X co-ordinate of the line but the system will not accept data. Where am I going wrong? Many thanks

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Draw twice full size but keep full size dimensions	matt4	AutoCAD Beginners' Area	9	19th Apr 2009 03:17 am
Scaling entities per paper size.	Johntosh	AutoLISP, VBA, the CUI & Customisation	6	22nd Nov 2008 01:00 pm
create and plot full size pdf properly	cadfly	AutoCAD Drawing Management & Output	12	25th Jan 2008 07:48 pm
Scaling Drawings	carl mac	AutoCAD Beginners' Area	6	19th Mar 2006 08:58 pm
How to draw Rectangle: Center-Full Base-Full Height?	LihtiumOverdosE	AutoLISP, VBA, the CUI & Customisation	8	26th Oct 2005 07:00 pm

7th Nov 2009, 06:03 pm	#2
dbroada Forum Deity Using: Electrical 2008 Join Date: Nov 2005 Location: Sussex, UK Posts: 3,049	why are you drawing at a scale? In AutoCAD you should ALWAYS draw full size.
	Dave

7th Nov 2009, 07:11 pm	#4
dbroada Forum Deity Using: Electrical 2008 Join Date: Nov 2005 Location: Sussex, UK Posts: 3,049	why not draw it full size and scale once complete. I think you might be able to use 'cal to launch the command line calculator but I can't be sure.
	Dave