A joint assembly usable on an external fixator device and structured to position a component through different adjustment modes, said joint assembly comprising: a primary adjustment assembly configured to be connected in adjusting relation to the component , said primary adjustment assembly disposed and structured to movably adjust the component through a first range of motion, a lock assembly positionable into and out of movement restricting relation to said primary adjustment assembly , a secondary adjustment assembly disposed and structured to movably adjust the component through a second range of motion, and said first range of motion representative of a gross adjustment mode of the component and said second range of motion representative of a fine adjustment mode of the component , characterized in that said primary adjustment assembly comprises a base and an adjustment member , the component being configured to be connected to the base and movable therewith, said primary adjustment assembly further comprising a cam assembly disposed in movable interconnecting relation between said base and said adjustment member , forced movement of said adjustment member defines a forced movement of said base and the component , via said cam assembly , through said first range of motion, said primary adjustment assembly further comprises a first gear movable with said adjustment member relative to the component , said secondary adjustment assembly defining at least a portion of said lock assembly and including a second gear , said second gear being movable into and out of mating engagement with said first gear , said mating engagement between said second and first gears defines said movement restricting relation of said lock assembly with said primary adjustment assembly and the component , and driving, meshing engagement of said second gear with said first gear comprises said second range of motion and said fine adjustment mode of the component . a primary adjustment assembly configured to be connected in adjusting relation to the component , said primary adjustment assembly disposed and structured to movably adjust the component through a first range of motion, a lock assembly positionable into and out of movement restricting relation to said primary adjustment assembly , a secondary adjustment assembly disposed and structured to movably adjust the component through a second range of motion, and said first range of motion representative of a gross adjustment mode of the component and said second range of motion representative of a fine adjustment mode of the component , characterized in that said primary adjustment assembly comprises a base and an adjustment member , the component being configured to be connected to the base and movable therewith, said primary adjustment assembly further comprising a cam assembly disposed in movable interconnecting relation between said base and said adjustment member , forced movement of said adjustment member defines a forced movement of said base and the component , via said cam assembly , through said first range of motion, said primary adjustment assembly further comprises a first gear movable with said adjustment member relative to the component , said secondary adjustment assembly defining at least a portion of said lock assembly and including a second gear , said second gear being movable into and out of mating engagement with said first gear , said mating engagement between said second and first gears defines said movement restricting relation of said lock assembly with said primary adjustment assembly and the component , and driving, meshing engagement of said second gear with said first gear comprises said second range of motion and said fine adjustment mode of the component . <EOS>