Known issue: Scrolling text appears to have some 'flex' in it

[rob040]

Scrolling text appears to have some 'flex' in it; moving letters appear to make irregular progress.

There are multiple effects at play here:

1. First, the display module tiles may not be properly aligned; even a half a millimeter is visible.
   Try to align the horizontal dot lines. Some modules are placed skewed during fabrication and can be aligned with a bit of force.

2. There is a gap between the display module tiles. Some manufacturers make them larger than others.
   The dot distance is 4.0 mm exactly, however, this gap makes the dot distance about 5.5 mm. This inconsistency is very much visible.
   The only way to solve this is to make a new back panel PCB or to saw the PCB in four pieces and re-glue them at the exact distance.
   The display manufacturer made the display itself 0.2 mm smaller, so that a placement at the right distance is possible.

3. The software timings of data shift-out and the display data updates to create scrolling text are not exact.
   These timing variations are probably visible.
   There has already made an improvement in the scroll data update timings, but the software can be improved. It is still debatable how much of this is actually noticeable with point 2. so much more visible.

[mats-nk]

I would suggest that you activate the wiki and use that for documentation/information.