Hi John, You are correct about the percentage enlargement and reduction of copies -- they are not as accurate nor precise as the percentage selected my lead you to believe. Another question to verify is: is vertical changed the same percentage as horizontal? There is no harm in having a ruler going both directions for verification. The DXF file output from Fer's program does give a line of correct length for the gnomon. This can be helpful to check lengths.
Happy dialing, Warren Thom (42 N, 88 W) John Carmichael wrote: > > This error (99% to 102%) may seem small, but can be very significant for > work on larger dials. The best thing to do would be to always check the > final copy size to make sure it is correct.
