Functions of bale opening zone: 

• It should take the fibers evenly from the bales.
• It should open up the fibers gently.
• The bale openers should open the fibers into smaller possible tufts.
• The size of tufts should be same.
• It should be easily programmable.

Functions of Coarse opening & cleaning zone:  

• The speed of beaters should be slow.
• The beaters have less number of beating points.
• The pitch of the beating elements of beaters is high.
• Grids are placed away from beaters.

Fine opening & cleaning zone: 

• This zone is used to open up & clean the fibers finely.
• In this zone more controlled amount is fed between the rollers because the speed of the roller are greater then the second zone rollers & the chances of breakage is high.
• The pitch of the beating elements of beaters should be less then the second zone.
• The distance between the grids is less.

Intense opening & cleaning zone: 

• The feeding of the fibers is more controlled.
• Pitch of beating elements should be less.
• Distance between the grids is less
• Speed should be greater then the previous zone.