Printer system including a placement mechanism for placing objects

1. A printer system for developing a three dimensional (3D) printed structure, the system comprising:

a plurality of spaced apart sets of printing devices;

a conveyor system arranged to serially convey a print medium operatively with respect to each set of printing devices at a substantially constant linear speed so that printed voxels from each successive set of printing devices form successive layers of the 3D printed structure upon the print medium; and

a robot configured to place an object upon layers of the 3D printed structure.

2. A printer system as claimed in claim 1 , wherein the robot includes a translation mechanism configured to translate the object at substantially the same speed as the conveyance of the print medium during placement.

3. A printer system as claimed in claim 2 , wherein the robot includes a further translation mechanism configured to translate the object towards the print medium during placement.

4. A printer system as claimed in claim 1 , wherein the printing devices are arranged so that each successive set of printing devices is located further from the conveyor than any preceding set.

5. A printer system as claimed in claim 4 , wherein each set of printing devices includes a plurality of printing devices arranged in a row.

6. A printer system as claimed in claim 1 , wherein all of the printing devices in each set of printing devices are configured to print voxels of material concurrently.

7. A printer system as claimed in claim 1 , wherein each set of printing devices is a singleton set containing exactly one printing device.

8. A printer system as claimed in claim 1 , wherein the material printed by set of printing devices comprises any one of the following group: a polymeric material, a metallic material, a sacrificial material, and an evaporative drying material.

9. A printer system as claimed in claim 8 , wherein the metallic material is any one of the group of: Indium and an alloy of Indium and Gallium.

10. A printer system as claimed in claim 1 , further including plurality of curing mechanisms interleaved between sets of printing devices and configured to cure the printed voxels.

11. A printer system as claimed in claim 10 , wherein each curing mechanism is configured to carry out at least one of the following operations: cooling to cause the voxels to solidify, evaporative drying, precipitation reactions, catalytic reactions and curing using electromagnetic radiation.

12. A printer system as claimed in claim 11 , wherein said electromagnetic radiation includes ultra violet radiation.