Irregular shingling or poor delivery stacking
Low severitySymptoms
Pieces overlapping chaotically; hard to collect even bundles
Probable causes
- Delivery belt speed out of sync
- delivery roller pressure
- small formats 'flying'
The Print Guy · 2026-10-05
Other problems in this category
Folding · TPG-220
Roller marks on the print
Shiny or friction streaks in the folding direction
Folding · TPG-217
Wrinkles in cross folds
Puckering at the second fold (air pocket)
Folding · TPG-218
Fold out of square
Pages don't line up; visible stagger at the signature front
Folding · TPG-219
Ink flaking at the fold
Ink or coating cracks right on the fold
Folding · TPG-221
Folding roller calibration by grammage (procedure)
Loose or marked folds; measurements changing with each paper
Folding · TPG-222
Double feed or suction failure at the folder feeder
Two sheets together or missed sheets; constant stops