A PICK AND PLACE DEVICE WITH AUTOMATIC PICK-UP-HEIGHT ADJUSTMENT AND A METHOD AND A COMPUTER PROGRAM PRODUCT TO AUTOMATICALLY ADJUST THE PICK-UP-HEIGHT OF A PICK AND PLACE DEVICE

摘要

A pick and place device, a method and a computer program product for automatic pick-up-height adjustment are disclosed. A first pneumatic system has a first controllable valve and a second controllable valve. The second controllable valve is connected with its input port to a vacuum source. An output port of the first controllable valve and an output port of the second controllable valve are connected to a common tube which is in fluid communication with at least one vacuum nozzle of the pick and place device. A second pneumatic system, with an inlet valve and an outlet valve are in fluid communication via a connecting tube. An open air exhaust and a flow controller are arranged in the connecting tube between the inlet valve and the outlet valve. A flow sensor detects the changes of the small air flow. The flow sensor is via a tube in fluid communication with the at least one vacuum nozzle.