Folding roller calibration by grammage (procedure)
High severitySymptoms
Loose or marked folds; measurements changing with each paper
Probable causes
- Roller pressure not set to the job's caliper
- setting inherited from the previous job
The Print Guy · 2026-10-05
Other problems in this category
Folding · TPG-222
Double feed or suction failure at the folder feeder
Two sheets together or missed sheets; constant stops
Folding · TPG-223
Variable fold measurement during the run
Same fold at different sizes; crosses drifting through the job
Folding · TPG-226
Wrinkles or tearing at the knife fold
Wrinkles at the second/third fold or sheets torn at the knife station
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