Coating machine adapted to coat food products with a particulate coating material, the machine comprising an infeed conveyor assembly, a rotary tumbling drum, an elevator device, and a discharge conveyor assembly, wherein: - the rotary tumbling drum is adapted - in a drum-mode of the machine - to be supplied with particulate coating material and to tumble the food products and particulate coating material together about a longitudinal axis, in order to subject the food products to a coating treatment wherein some of the particulate coating material adheres to the food products while the remainder is excess coating material; the rotary tumbling drum comprising a drum wall, an intake opening, and a discharge opening; - the infeed conveyor assembly is adapted to receive food products to be coated at an inlet of the machine and to convey the products to be coated to a release end of the infeed conveyor assembly, wherein the machine is adapted to allow for - in the drum-mode of the machine - the dropping of the products to be coated in the rotary tumbling drum from said release end, - the elevator device is adapted to receive a mixture of a portion of said excess coating material and coated food products from the discharge opening of the rotary tumbling drum and to supply said coated food products to the discharge conveyor assembly, - wherein the discharge conveyor assembly is adapted to receive the food products on a receiving part of the discharge conveyor assembly and to convey the coated food products to an outlet of the machine, wherein - in the drum mode of the machine - the food products are gravity fed from the elevator device, wherein the machine is configured so that - in a conveyor-mode of the machine - the position of the release end of the infeed conveyor assembly and the receiving part of the discharge conveyor assembly, possibly with a temporary bridging conveyor, are arranged to adjoin each other whilst extending through the rotary tumbling drum, so that food products bypass the rotary tumbling drum and the elevator device, wherein the release end of the infeed conveyor assembly is extendable through the intake opening and into the rotary tumbling drum, and wherein the infeed conveyor assembly is provided with a release end adjusting mechanism adapted to adjust the longitudinal position of the release end of the infeed conveyor assembly relative to the rotary tumbling drum, thereby providing alternative tumbling action modes of the machine. - the rotary tumbling drum is adapted - in a drum-mode of the machine - to be supplied with particulate coating material and to tumble the food products and particulate coating material together about a longitudinal axis, in order to subject the food products to a coating treatment wherein some of the particulate coating material adheres to the food products while the remainder is excess coating material; the rotary tumbling drum comprising a drum wall, an intake opening, and a discharge opening; - the infeed conveyor assembly is adapted to receive food products to be coated at an inlet of the machine and to convey the products to be coated to a release end of the infeed conveyor assembly, wherein the machine is adapted to allow for - in the drum-mode of the machine - the dropping of the products to be coated in the rotary tumbling drum from said release end, - the elevator device is adapted to receive a mixture of a portion of said excess coating material and coated food products from the discharge opening of the rotary tumbling drum and to supply said coated food products to the discharge conveyor assembly, - wherein the discharge conveyor assembly is adapted to receive the food products on a receiving part of the discharge conveyor assembly and to convey the coated food products to an outlet of the machine, wherein - in the drum mode of the machine - the food products are gravity fed from the elevator device, wherein the machine is configured so that - in a conveyor-mode of the machine - the position of the release end of the infeed conveyor assembly and the receiving part of the discharge conveyor assembly, possibly with a temporary bridging conveyor, are arranged to adjoin each other whilst extending through the rotary tumbling drum, so that food products bypass the rotary tumbling drum and the elevator device, wherein the release end of the infeed conveyor assembly is extendable through the intake opening and into the rotary tumbling drum, and wherein the infeed conveyor assembly is provided with a release end adjusting mechanism adapted to adjust the longitudinal position of the release end of the infeed conveyor assembly relative to the rotary tumbling drum, thereby providing alternative tumbling action modes of the machine.