Please help printing & model units discrepancy and confusion.

Greetings:

I have a line measuring 250mm height and would like to print it to
scale to pdf. The drawing units (Format - Units) and drawing scale
are set to mm (Options - User preferences - Drag & Drop scale). I
create a new empty layout with one view port covering the whole
landscape Ansi C size paper with the following setting:

Printer / Plotter: Adobe PDF
Page size: Ansi C
Plot area: Extents
Center the plot: checked
Scale: 1:1
Drawing orientation: Landscape.
1 inch = 1 unit

The line height dimension shows 250mm in modelspace. However, when I
try to dimension it in paperspace it shows 12.7. If I execute a zoom
1xp the dimension is 250 but the line is so big that it doesn't fit in
the view port. When I do a list and select the view port, I get this:

---------------------------------
Command: _.PSPACE
Command: list

Select objects: 1 found

Select objects:

VIEWPORT Layer: "OBJECT"
Space: Paper space
Layout: Layout2
Handle = 69C9
Status: On and Active
Scale relative to Paper space: 0.0434xp
center point, X= 5.3097 Y= 3.9485 Z= 0.0000
width 20.9976
height 16.0995

---------------------------------

I am totally confuse to why the scale is "1 inch = 1 unit" while all
my settings are in mm and can't figure out how I can print the drawing
to scale in mm to pdf. Your comments and insight thoughts would be
greatly appreciated.

 

Your drawing units are millimeters but your paper size is inches (Ansi C),
therefore your scale should be "custom" where 1" = 25.4 units. This will
scale up your viewport to the correct size in millimeters. Or select ISO 2,
in which case, scale will be 1:1 and 1mm = 1 unit.

Pete

 

Correction: ISO A2

 

Thanks, Pete, for your help.

I am wondering if there is a sure way to check if my AutoCAD units is
set to mm. The reason I am asking this is when I open a 1:1 scale mm
drawing exported from Pro/E in AutoCAD modelspace, the drawing seems
to be in inches (the 250mm length is now 9.8425") even though my
drawing units and drawing scale are still in mm. Do you have an idea
what could be the problem?

I am using AutoCAD 2005 by the way.