Generating three-dimensional objects

1. A build module comprising:

a housing having a top and a bottom;

a build material chamber in the housing to hold build material, the build material chamber having an opening for build material to be expelled from the build material chamber to a build material distributor;

a build chamber positioned near the top of the housing, the build material chamber being positioned beneath the build chamber in the housing, the build chamber comprising a moveable support member, wherein the build material distributor is to supply successive layers of the build material onto the moveable support member from the build material chamber, the build module being removably insertable into and removably coupled to a build receiver of an additive manufacturing system to allow the additive manufacturing system to solidify a portion of the successive layers received onto the moveable support member during the solidification process of the build material, and wherein the moveable support member separates the build material chamber from the build chamber to block build material from the above the build material chamber from being received into the build material chamber during a solidification process of the build material; and

a first fastener member attached to the housing, wherein the first fastener member is to removably couple to a second fastener member attached to the build receiver of the additive manufacturing system.

2. The build module of claim 1 further comprising the build material distributor to provide the successive layers of build material from the build material chamber onto the support member of the build chamber.

3. The build module of claim 2 further comprising a motor to drive the build material distributor.

4. The build module of claim 1 , wherein the build module is to be removably inserted into the build receiver generally laterally and wherein the first fastener member and/or the second fastener member comprise magnetic fasteners.

5. A build module comprising:

a housing having a top and a bottom;

a build material chamber in the housing to hold build material, the build material chamber having an opening for build material to be expelled from the build material chamber to a build material distributor;

a build chamber in the housing, the build chamber comprising a moveable support member to receive successive layers of the build material from the build material chamber as supplied by the build material distributor, and the build material chamber being positioned beneath the build chamber in the housing, wherein the moveable support member separates the build material chamber from the build chamber to block build material from the above the build material chamber from being received into the build material chamber during a solidification process of the build material;

a first fastener member attached to the housing, wherein the first fastener member is to removably couple to a second fastener member attached to the build receiver of the additive manufacturing system; and

a computer-readable medium in the housing, the computer-readable medium comprising build module data representing a feature of the build module, the build module being removably insertable into a build volume of an additive manufacturing system to allow the additive manufacturing system to solidify a portion of the successive layers to be received onto the moveable support member during the solidification process of the build material.

6. The build module of claim 5 wherein a controller in the additive manufacturing system is to control at least one of:

providing the build material by the build material distributor to the build chamber; and

selective delivering of coalescing agent by an agent distributor to the build material based on the build module data.

7. The build module of claim 5 wherein the feature comprises a type of the build material to be held in the build chamber.

8. The build module of claim 6 further comprising a sensor to detect the type of the build material.

9. The build module of claim 5 wherein the feature is received in the computer-readable medium as input from a user.

10. A build module for an additive manufacturing system, the build module comprising:

a housing having a top and a bottom;

a build material chamber in the housing to hold build material, the build material chamber having an opening for build material to be expelled from the build material chamber to a build material distributor; and

a build chamber positioned near the top of the housing, the build chamber comprising a moveable support member to receive build material from the build material chamber and wherein the build material distributor is to supply successive layers of the build material from the build material chamber to the build chamber, and the build material chamber being positioned beneath the build chamber in the housing, the build module being removably insertable into and removably coupled to a build volume of the additive manufacturing system at a same time as another such build module to allow the additive manufacturing system to solidify a portion of the successive layers to be received onto the moveable support member during the solidification process of the build material, wherein the moveable support member separates the build material chamber from the build chamber to block build material from the above the build material chamber from being received into the build material chamber during a solidification process of the build material; and

a first fastener member attached to the housing, wherein the first fastener member is to removably couple to a second fastener member attached to the build receiver of the additive manufacturing system.

11. The build module of claim 10 , wherein the build material distributor is part of the additive manufacturing system in which the build module is removably insertable.

12. The build module of claim 10 , wherein the build material chamber comprises a moveable support member to hold the build material.

13. The build module of claim 10 , wherein the first fastener member and/or the second fastener member comprise magnetic fasteners.

14. The build module of claim 1 , wherein the first fastener member and/or the second fastener member comprise mechanical fasteners.

15. The build module of claim 1 , further comprising:

wheels attached to a bottom of the housing to enable the build module to be rolled.

16. The build module of claim 5 ,

wherein the first fastener member is to removably couple to the second fastener member to enable the housing to be removably insertable into and removably coupled to the build volume of the additive manufacturing system.

17. The build module of claim 16 , wherein the first fastener member and/or the second fastener member comprise mechanical fasteners.

18. The build module of claim 6 , further comprising:

wheels attached to a bottom of the housing to enable the build module to be rolled.