Postby nickhenderson » April 4th, 2014, 3:30 am
And of course do the age old trick of reference markings.
In blank areas of the plan, get a 90 deg set square and draw a right angle corner. Working from the apex, measure off a set dimension, say 100mm up each leg and make a mark. Do this in a few places say 3-4 per sheet.
After you have had the plan scaled up, before taking it home, check your reference marks.
Say you are scaling up 25%. The reference mark was 100, so now it should be 125. Check both the vertical and horizontal. Paper can stretch, elongation in the process,....... I'm not a printer but have heard of these problems many times.
This way, using the reference markings, you are sure that your "blown up version" really is accurate in both the vertical and horizontal.