I did a little test.
I have a simple 600x300cm image with a line right in the middle of it. You can download it here:
http://www.marcinbittner.com/luzem/600x300mm.jpgThe point is to print that vertical line on the 305'th milimeter of the paper.
I have a 700mm ruler to measure everything.
Every spread below was measured. Every spread is 610mm long (24")
CASE ONE:
- Optimal Spaced
- 0.2 red border B (not B+)
- 6 spreads added to the queue and printed
The SIZE/LOC shown equal 5 / 5 / 5 /5
Results of the placement of vertical line:
304,5
304,5
304,0
303,5
CASE TWO
- Center
- Red border or no border - same results
- The size/loc shows 4.9 4.9 5.1 5.1
10+ spreads with perfect 305mm line..
I'm puzzled. You told me Optimal spaced yet the center placement is correct.
Does that have to do with a fact that I put 610mm paper into paper size and in fact paper is sometimes 609.6? If it was problem with a printer I couldn't hit 305 line every time on CENTER placement.