44b33013_ble_Seam_Troubleshooting_Guide__Suggested_Remedy
[Probable Cause] Improper Cap Centering Cam alignment. [Suggested Remedy] 
The Knockout Rod w/Pad height should be adjusted to lightly control the can & cover while on their rise onto the the Seaming Chuck. Radial adjustment should be set to follow the same rate of incline as the Lower Chuck Cam.
Knocked Down Flange | Cause & Remedy | Double Seam Troubleshooting Guide
Suggested Remedy