1.
Facts on the Imperial drawing:
Units are set to architectural, where 1 unit is an inch.
2.
Facts on the Metric drawing.
Units are set to decimal, where 1 unit is a meter.
3.
To insert/xreference the Metric drawing into the Imperial drawing,
We need to know the insertion scale factor.
Fact: 1 inch = 25.4 mm , 1 / 25.4 = 0.03937
To insert a metric drawing where 1 unit is a meter,
The scale factor would be 0.03937x1000= 39.37
4.
Hence,
To insert a metric drawing where the 1 unit is a centimeter,
The scale factor would be .03937x100=3.937
And to insert a metric drawing where 1 unit is a millimeter,
The scale factor would be 0.03937.
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