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CAD tip CAD tip # 4581:

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Q - question

Why does AutoCAD insert my blocks in wrong scale?

A - answer Blocks and Xrefs contain their insertion unit settings, which are used for automatic scale conversion (rescale) when they are inserted/attached to a drawing using other units. These units are defined in the INSUNITS (default units), INSUNITSDEFSOURCE (source units) and INSUNITSDEFTARGET (target units) variables.

In older AutoCAD versions, these variables were used only for the block inserts/drags from DesignCenter. AutoCAD 2006 (and higher) uses them for all methods of insertion of blocks, xrefs and images.

If your blocks are inserted in an improper scale (e.g. scaling 0.254, 12, 10 or 1000), you have probably wrong (different) settings of your block insertion units. Set INSUNITS e.g. to 0 (unitless) - then both the INSUNITSDEFxxxx variables will apply - set them also to 0. Also make sure you are using the same measurement system (imperial/metric) in both drawings (the MEASUREMENT variable).

Check also the annotative scales. Please note that other unit settings apply when dealing with AEC drawings - see the AECDWGSETUP and -DWGUNITS commands.

ACAD2011ACAD2010ACAD2008ACAD2006CivilADT
100% *  CAD 
16.8.2005    82109x   FAQ  
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See also:
Tip 6283:My block insertion ignores the scale/units.
Tip 2528:DesignCenter inserts 1000x larger blocks.
Tip 1907:How to influence scale of blocks dragged from DesignCenter?


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