Sheet damage can be prevented by increasing the amount of overlap. This is done by reducing the speed of the slow speed tapes (either adjusting it mechanically through the a gearbox or electrically through a motor).
When sheeting easily damaged or soft material, consider applying rubber to the front stop boards or fingers to absorb the impact of the sheet.
If the damage appears on one side of the sheet, check the sheet squareness and make sure the front stops are square to the back of the stacker across the width of the machine
