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Devices Come in Too Big or Too Small

Tuesday, September 7th, 2010

If devices are appearing too big or too small when inserted on your drawing, the most likely cause is that the “To Scale” setting for the block that is being used is set wrong.

To fix this, use the “DM Electrical->Customization->[Block Type]->Edit Project List” command. Find the block that is the problem and look at the “To Scale” column. Change this setting and try inserting the device again to see if it comes in correctly.

If the block is too big, “To Scale” is probably checked but it should not be.

If the block is too small, “To Scale” is probably not checked but it should be.

What “To Scale” does: The “To Scale” setting controls the scale factor of the block when it is inserted by Design Master Electrical.

  • Checked: The scale factor for the block is 1.
  • Unchecked: The scale factor for the block is set equal to the DIMSCALE system variable in the drawing.

An example of a to-scale block is a 2×4 light fixture. That block should be created so that it is a 24×48 unit rectangle. When inserted with a scale factor of 1, it appears in your drawing as a 24×48 unit rectangle. Your base unit is inches, so it appears as a 24″x48″ rectangle. It should be this size on all drawings. The size of the fixture does not depends upon the scale factor of the drawing. (However, when you plot the drawing, the light fixture size will depend upon the scale factor.)

An exampel of a not-to-scale block is a receptacle. You don’t want it to-scale because it would be a little line no one could see. Instead, you create a circle with some lines that you want to be 1/10″ big when printed on paper. You create the circle so that it is a 0.1 unit diameter circle. It will be inserted with a scale factor equal to DIMSCALE on your drawing. If you drawing is 1/8″=1′, DIMSCALE = 96, and the circle will be 9.6 units in diameter. The size of the receptacle will change when you change the scale factor of the drawing. (However, when you plot the drawing, the receptacle will always appear 1/10″ in diameter.)

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