A distributor machine for distributing fibrous materials comprises a bale chamber (6) for receiving fibrous materials, a shredder device (10) for shredding the fibrous materials, a barrier device (44) associated with the shredder device for holding back or recirculating unshredded materials, a blower device (8) for distributing shredded materials fed through a feed gap (47) from the shredder device to the blower device, and a regulator device (44) for regulating the feeding of shredded materials through the feed gap (47). The distributor machine includes at least one sensor that senses an operating parameter of the distributor machine and a control device (72) that controls operation of the machine according to the sensed operating parameter, preferably by adjusting the position of the regulator device (50).
