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A welding system includes a welding wire feeder, and the welding wire feeder includes a motor and an adjustable drive shaft assembly. The motor is and configured to rotate a feed roll with respect to the wire drive assembly housing. The adjustable drive shaft assembly is coupled to the motor and con

A welding system includes a welding wire feeder, and the welding wire feeder includes a motor and an adjustable drive shaft assembly. The motor is and configured to rotate a feed roll with respect to the wire drive assembly housing. The adjustable drive shaft assembly is coupled to the motor and configured to couple with the feed roll. The adjustable drive shaft assembly includes a drive mechanism configured to urge rotation of the feed roll and to adjust a position of the feed roll relative to the wire drive assembly housing.

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1. A welding system, comprising: a welding wire feeder, comprising: a motor configured to rotate with respect to a wire drive assembly housing; andan adjustable drive shaft assembly coupled to the motor and configured to couple with a feed roll;wherein the adjustable drive shaft assembly comprises a

1. A welding system, comprising: a welding wire feeder, comprising: a motor configured to rotate with respect to a wire drive assembly housing; andan adjustable drive shaft assembly coupled to the motor and configured to couple with a feed roll;wherein the adjustable drive shaft assembly comprises a drive mechanism configured to transfer a rotational force from the motor to the feed roll and to adjust an axial position setting of the feed roll relative to the wire drive assembly housing without rotation of the feed roll during adjustment of the axial position setting, wherein the drive mechanism comprises an axially-adjustable locking mechanism configured to abut the feed roll, and rotation of the axially-adjustable locking mechanism adjusts the axial position setting of the feed roll and the drive mechanism relative to a shaft of the wire drive assembly, wherein the axially-adjustable locking mechanism of the drive mechanism is independently adjustable relative to the feed roll and the shaft of the adjustable drive shaft assembly configured to rotate with the motor, and wherein the axially-adjustable locking mechanism, the shaft, and the feed roll are coaxial with one another. 2. The welding system of claim 1, wherein the drive mechanism is configured to adjust the axial position setting of the feed roll such that a groove in the feed roll is brought into alignment with a wire feed axis. 3. The welding system of claim 1, wherein the drive mechanism is configured to adjust the axial position setting of the feed roll along a shaft axis of the adjustable drive shaft assembly. 4. The welding system of claim 1, wherein the adjustable drive shaft assembly comprises: the shaft configured to rotate with the motor; anda spring for biasing the feed roll toward the drive mechanism;wherein the axially-adjustable locking mechanism is configured to lock the drive mechanism in an axial position along the shaft. 5. The welding system of claim 1, wherein the drive mechanism comprises a protrusion configured to engage and urge rotation of the feed roll when the motor rotates the adjustable drive shaft assembly. 6. The welding system of claim 1, wherein the drive mechanism is axially between the feed roll and the axially-adjustable locking mechanism. 7. The welding system of claim 4, wherein the shaft comprises a shaped end configured to receive the drive mechanism, and the axially-adjustable locking mechanism comprises a screw configured to be received through an aperture in the drive mechanism and to be coupled with the shaft. 8. The welding system of claim 7, wherein the adjustable drive shaft assembly comprises a spring for biasing the drive mechanism toward an abutment surface of the screw. 9. The welding system of claim 4, wherein the drive mechanism is configured to be threaded onto an end of the shaft, and the axially-adjustable locking mechanism comprises a nut for locking the drive mechanism in place. 10. A welding wire feeder, comprising: a wire drive assembly housing;a motor disposed adjacent the wire drive assembly housing;a shaft coupled to and extending from the motor;a feed roll configured to rotate with respect to the wire drive assembly housing; anda drive mechanism configured to couple with the shaft and to transfer rotation of the shaft to the feed roll and to adjust an axial position setting of the feed roll along the shaft without rotation of the feed roll, wherein the drive mechanism comprises an axially-adjustable locking mechanism configured to abut the feed roll, and rotation of the axially-adjustable locking mechanism adjusts the axial position setting of the feed roll and the drive mechanism relative to the shaft, wherein the axially-adjustable locking mechanism of the drive mechanism is independently adjustable relative to the feed roll and the shaft, and wherein the axially-adjustable locking mechanism, the shaft, and the feed roll are coaxial with one another. 11. The welding wire feeder of claim 10, wherein the feed roll is configured to be inserted onto or removed from the shaft without adjusting an axial position of the drive mechanism. 12. The welding wire feeder of claim 10, wherein the feed roll comprises a groove for receiving welding wire, and the drive mechanism is configured to position the feed roll to align the groove with a wire feed axis. 13. The welding wire feeder of claim 10, wherein the axially-adjustable locking mechanism is configured to lock the drive mechanism in place along the shaft. 14. The welding wire feeder of claim 13, wherein the shaft comprises a shaped end configured to receive the drive mechanism, and the axially-adjustable locking mechanism comprises a screw configured to be received through an aperture in the drive mechanism and to be coupled with the shaft. 15. The welding wire feeder of claim 13, wherein the drive mechanism is configured to be threaded onto an end of the shaft, and the axially-adjustable locking mechanism comprises a nut for locking the drive mechanism in place. 16. A welding wire feeder drive shaft assembly, comprising: a shaft configured to couple with a motor drive of a welding wire feeder; anda drive mechanism configured to engage a feed roll to drive rotation of the feed roll, wherein the rotation of the feed roll feeds welding wire through the welding wire feeder;wherein the drive mechanism facilitates an adjustment of an axial position setting of the feed roll along the shaft without rotation of the feed roll during the adjustment of the axial position setting, wherein the drive mechanism comprises an axially-adjustable locking mechanism configured to abut the feed roll, and rotation of the axially-adjustable locking mechanism adjusts the axial position setting of the feed roll and the drive mechanism relative to the shaft, wherein the axially-adjustable locking mechanism of the drive mechanism is independently adjustable relative to both the feed roll and the shaft, and wherein the axially-adjustable locking mechanism, the shaft, and the feed roll are coaxial with one another. 17. The welding wire feeder drive shaft assembly of claim 16, wherein the feed roll is configured to be inserted onto or removed from the welding wire feeder drive shaft assembly without adjusting a position of the drive mechanism. 18. The welding wire feeder drive shaft assembly of claim 16, comprising: a spring disposed about the shaft and configured to bias the feed roll toward the drive mechanism, wherein the axially-adjustable locking mechanism is configured to lock the drive mechanism into an axial position along the shaft. 19. The welding wire feeder drive shaft assembly of claim 18, wherein the shaft comprises a shaped end configured to receive the drive mechanism, and the axially-adjustable locking mechanism comprises a screw configured to be received through an aperture in the drive mechanism and to be coupled with the shaft. 20. The welding wire feeder drive shaft assembly of claim 18, wherein the drive mechanism is configured to be threaded onto an end of the shaft, and the axially-adjustable locking mechanism comprises a nut for locking the drive mechanism in place.