Abstract: Aim control arrangement for conveyor installations of the type having coding cards coordinated to individual carriages that work together with address questioning stations of the conveyor installation comprising a chain guiding rail, a running rail for said carriages, a pulling chain guided by said chain guiding rail, an address carrier frame for each carriage in which the coding card is received, an adjusting insert in said frame operative to adjust the height of the coding card in the proximity of the address questioning stations for cooperation with corresponding means.