Position sensing system for inspection handling system

摘要

A drive for a carrier tape used in conjunction with a pick and place module of a machine for inspecting and handling advances the carrier tape to its desired position in two steps. Using the number of sprocket holes between compartments in the tape (n holes), the first step is n-1 sprocket holes. The second step takes the carrier tape the remaining distance to complete the advance to the distance equal to n sprocket holes. The tape is driven by friction rollers not by means of the sprocket holes. The presence of a device in a compartment and its proper positioning in the compartment is also inspected.