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help using metric triangular scales

Printed From: CAD Forum
Category: EN
Forum Name: AutoCAD
Forum Description: Discussion about AutoCAD and AutoCAD LT, viewers, DWG and DWF formats, Design Review, AutoCAD 360, add-ons
URL: https://www.cadforum.cz/forum_en/forum_posts.asp?TID=7034
Printed Date: 16.May.2026 at 13:25


Topic: help using metric triangular scales
Posted By: cadman33619
Subject: help using metric triangular scales
Date Posted: 15.Dec.2011 at 17:30
 i'm a lil confused with how metric scales work (using a triangular scale). my drawing is set up with a metric template... using 11x17 sheet size...my viewport is zoomed to 1:20. but when i print it out and use a triangular scale's 1:20 to check my measurements, its ot correct. my plot setup is 1mm=27.9units

 

what am i missing?


Replies:
Posted By: John Connor
Date Posted: 15.Dec.2011 at 18:10
Plot scale should read 1 unit = 1 mm if you are plotting from a layout.

BTW...1 inch = 25.4mm not 27.9mm.


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"Humans have a strength that cannot be measured. This is John Connor. If you are reading this, you are the resistance."

<<AutoCAD 2015>>

Posted By: philippe JOSEPH
Date Posted: 16.Dec.2011 at 07:00
Hello, if you print on a smal plotter it's normal to have to cope with the margins of your plotter ( not on a big printer using a large paper roll ).
With the message that you get : 1 mm = 27.9 units I think that it means that your plotter have 25.4/27.9 = 0.9103942... --> 1-0.9103942 = 0.0896058 # 8.9 % margins.
To print correctly in millimeters and obtain a scalable print you must print a smaler rectangle in millimeters to skeeze your plotter margins :
 
11" x 17" =
 
11 x 25.4 mm = 279.4 mm without margins
17 x 25.4 mm = 431.8 mm without margins
 
11 x 25.4 x 0.910 = 254.254 mm with margins
17 x 25.4 x 0.910 = 392.938 mm with margins
 
You can also see my reply on a same subjet in the forum discussion of last week dated 09 dec 2011 at 11:03


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