Recoater cleaning system

1. A system for cleaning an additive manufacturing machine recoater, comprising:

a position module for sensing and/or determining a position of a recoater of the additive manufacturing machine;

a gas manifold disposed in the additive manufacturing machine and configured to spray a pressurized gas on the recoater when the recoater is in at least one cleaning position;

a valve configured to allow the pressurized gas to flow from a gas source to the gas manifold; and

a valve control module configured to control the valve as a function of the position sensed and/or determined by the position module, wherein the valve control module is configured to open the valve when the recoater is at one or more selected positions, wherein the one or more selected positions include a cleaning position, wherein the cleaning position is behind a zero position of normal operation of the recoater, wherein the gas manifold is positioned above the recoater within the additive manufacturing machine.

2. The system of claim 1 , comprising a controller for controlling one or more components of the additive manufacturing machine, wherein the controller includes the valve control module.

3. The system of claim 2 , wherein the controller includes the position module.

4. The system of claim 1 , wherein the position module includes a position sensor configured to sense when the recoater is in a selected position.

5. The system of claim 1 , wherein the gas manifold includes a pipe that extends in the direction of the recoater.

6. The system of claim 1 , wherein the gas manifold is positioned to spray gas in a direction away from one or both of a build area and a powder bed.

7. A method, comprising:

sensing and/or determining a position of a recoater of an additive manufacturing machine;

determining whether the position of the recoater is one or more selected positions for cleaning;

wherein if the position of the recoater is a selected position, opening a valve to allow a pressurized gas to flow through a cleaning manifold to spray on the recoater to clean the recoater, wherein the one or more selected positions includes behind a zero position of normal operation of the recoater, wherein the gas manifold is positioned above the recoater within the additive manufacturing machine.

8. The method of claim 7 , wherein the one or more selected position can be created and/or selected by a user.

9. The method of claim 7 , further comprising determining an interval of recoating, wherein if the interval of recoating is a selected interval of recoating, and if the position of the recoater is a selected position, opening a valve to allow a pressurized gas to flow through a cleaning manifold to spray on the recoater to clean the recoater.

10. A non-transitory computer readable medium, comprising computer executable instruction for executing a method, the method including:

sensing and/or determining a position of a recoater of an additive manufacturing machine;

determining whether the position of the recoater is one or more selected positions for cleaning;

wherein if the position of the recoater is a selected position, opening a valve to allow a pressurized gas to flow through a cleaning manifold to spray on the recoater to clean the recoater, wherein the one or more selected positions includes behind a zero position of normal operation of the recoater, wherein the gas manifold is positioned above the recoater within the additive manufacturing machine.

11. The non-transitory computer readable medium of claim 10 , wherein the one or more selected position can be created and/or selected by a user.

12. The non-transitory computer readable medium of claim 10 , wherein the method further comprises determining an interval of recoating, wherein if the interval of recoating is a selected interval of recoating, and if the position of the recoater is a selected position, opening a valve to allow a pressurized gas to flow through a cleaning manifold to spray on the recoater to clean the recoater.