A conveyor memory system stores signals representing the effects of the conveyor when unloaded in a memory. Each portion of the conveyor, which may be an endless belt, is assigned a particular address location in the memory. The effects of the unloaded conveyor belt, such as the weight at a particular weighing point, are stored in the memory at the address location corresponding to that particular portion of the belt. The stored signal representing the effect, such as weight, of the belt for that particular portion is read out of the memory as that particular portion passes the weighing point. The signal read out of the memory compensates for the effects of the unloaded conveyor, which may vary for each portion of the conveyor.