FAT Checks for a Roll-to-Roll Flexographic Press
How buyers can turn web width, print width and repeat length into practical pass or fail checks during a factory acceptance test, and what to confirm before quoting.
Decide before the factory acceptance test whether the press must prove its rated maximum web width of 850 mm and maximum printing width of 800 mm on both paper and packaging film, or on one substrate only. That choice shapes the whole test plan, because a pass on one material does not establish behavior on the other.
Build the FAT around measurable checks rather than a demonstration run. Ask the supplier to print a test job at the maximum printing width and at repeat lengths near the ends of the 350–900 mm range, then agree in advance what counts as a fail: for example, registration drift beyond a stated tolerance, web wander at the edges, or print defects that recur at the same position. Include a repeat-length changeover and record setup time and waste. For each check, specify the substrate, the run length, the sampling interval and who signs off.
Before requesting a quote, confirm with the supplier which substrates and widths the FAT will cover, how pass or fail limits will be defined and recorded, and whether the test runs and any resulting material waste are included in the offer.