Mike,
The suggestions others have given you are good. These are variables on
how to approach this issue. It is not a "problem" or "virus" in
AutoCAD, however. This is one of the design principles of AutoCAD.
You do the model or object you want to detail in the "Model Space" at
1:1 - including dimensions. Then create a view of it in "Paper Space".
In the "Paper Space" (set to the dimensions of your paper) is your title
block and notes around the view or views. This view (or views) can then
be scaled to the desired readable size, rotated in 3D (if you have
heights to your components - that's another story), mirrored, zoomed in
for details and have other dimensions added (in Paper Space), etc.
without affecting the model in "Model Space".
The best book to get for how to work with AutoCAD is "Inside AutoCAD
(Version?)" and you can get it from Amazon for anywhere from $27 - $80
depending on the sale. If you have an older version of AutoCAD, check
it out at the library. You'll want to reference: "ANNOTATING,
DIMENSIONING, AND PLOTTING. / Paper Space Layouts."
Good luck.
Cherie Litson
Sr. PCB Designer, Nytec
President, IPC Cascade Chapter
(425)703-0441 (MS Off)
(425)883-3337 ext 207 (Nytec Off)
(206)619-8844 (cell phone)
-----Original Message-----
From: Mike Clemente [mailto:[log in to unmask]]
Sent: Thursday, January 10, 2002 3:39 PM
To: [log in to unmask]
Subject: [DC] AutoCad Dimensioning
Hi Everyone,
I am using OrCad Layout for PCB design and create the fabrication
drawing in AutoCad as follows:
1. Run Post Processor to extract Drill Drawing (board outline, hole
symbols, and drill chart) from OrCad Layout, resulting in a DXF file.
2. Open DXF file in AutoCad and add necessary board dimensions @1/1
scale.
3. I then select all and create a Block, and then scale 1.5/1.
The problem is when I explode the block to make any changes, the
dimensions do not remain at the 1/1 scale, but change to whatever I
scaled the block as.
Ex. 1/1 dim=10.000, when exploded, dimension=15.000. What can I do to
prevent this? If I don't create a Block first before scaling, the
dimensions conform to the scaling factor and do not remain 1/1.
Thanks in Advance,
Mike
Mike Clemente, C.I.D.
Sr. PCB Design Specialist
dZinit Applied Technologies
Tel: 847-545-8170
Fax: 847-545-8175
Email: [log in to unmask]
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