The V-Groove Exterior Backup controls where the Blade Plunges into the Matboard (not the Fallout) on the Exterior Cuts of the Outside Cut of the V-Groove.
The Exterior Cut is where the Blade Plunges/Retracts from the Matboard (not the Fallout).
If the Exterior Backup on the Outside Cut of the V-Groove is cut Too Long, Decrease the Exterior Backup.
If the Exterior Backup on the Outside Cut of the V-Groove is cut Too Short, Increase the Exterior Backup.
V-Groove Exterior Backup Full Definition
The V-Groove Exterior Backup controls where the Blade Plunges into the Matboard (not the Fallout) on the Exterior cuts of the Outside Cut of the V-Groove. The initial plunge position is determined by the bevel type.
The Exterior Cut is where the Blade Plunges or Retracts from the Matboard (not the Fallout).
If the Exterior Backup on the Outside Cut of the V-Groove is cut Too Long, Decrease the Exterior Backup.
If the Exterior Backup on the Outside Cut of the V-Groove is cut Too Short, Increase the Exterior Backup.