Abstract: The invention is directed to a method of apply controllable pneumatic force in a multibarrel pipette puller to pull single and multibarrel pipettes. A multibarrel pipette puller has a top mechanical portion and a bottom control box. In the top mechanical portion, a metal base is mounted with a pneumatic cylinder, a linear motion guide rail with its movable block connected a clamp body, a pneumatic rotator connected a drill chuck and a pair of heater fixture located between the clamp body and the drill chuck. An optical grid plate is attached on side of the clamp body. An optical sensor is mounted on the metal base along side of the optical grid plate moving path. The piston rod of pneumatic cylinder is connected to the clamp body to deliver pulling and pushing force. The rotator can turn the drill chuck up to 180 degree clockwise or turn counter clockwise back to original position. Both the cylinder and rotator are actuated by pressured air.

Abstract: The invention is directed to a method of apply controllable pneumatic force in a multibarrel pipette puller to pull single and multibarrel pipettes. A multibarrel pipette puller has a top mechanical portion and a bottom control box. In the top mechanical portion, a metal base is mounted with a pneumatic cylinder, a linear motion guide rail with its movable block connected a clamp body, a pneumatic rotator connected a drill chuck and a pair of heater fixture located between the clamp body and the drill chuck. An optical grid plate is attached on side of the clamp body. An optical sensor is mounted on the metal base along side of the optical grid plate moving path. The piston rod of pneumatic cylinder is connected to the clamp body to deliver pulling and pushing force. The rotator can turn the drill chuck up to 180 degree clockwise or turn counter clockwise back to original position. Both the cylinder and rotator are actuated by pressured air.