Method and system for extended three-dimensional printing

1 . A system for three-dimensional printing, comprising:

a three-dimensional printing apparatus configured for printing an object using a building material supplied from a container;

a computer, configured to receive working hours of personnel operating said apparatus, to calculate, based on three-dimensional printing data describing said object, a supply period during which said container is expected to be emptied, and to transmit to said apparatus a signal to initiate said printing at a delayed time selected to ensure that an end time of said supply period is within said working hours;

wherein said apparatus comprises a plurality of containers, each supplying a different building material, and wherein said computer is configured to calculate the supply period, separately for each container, thereby providing a plurality of supply periods, and to transmit to said apparatus the signal to initiate said printing at the delayed time selected to ensure that the end time of each of said supply periods is within said working hours.

2 . The system according to claim 1 , wherein said computer is configured to calculate said supply period based on a predetermined total amount of material in said container.

3 . The system according to claim 1 , wherein said computer is configured to receive input pertaining to an amount of material in said container, and to calculate said supply period based on said input amount.

4 . The system according to claim 3 , wherein said computer is configured to receive said input via a user interface.

5 . The system according to claim 3 , wherein said computer is configured to receive from said apparatus a signal indicative of said amount.

6 . The system of claim 1 , wherein said three-dimensional printing apparatus comprises:

at least one printing nozzle;

a plurality of modeling material containers; and

a controller configured to execute a series of printing instruction batches to control said printing nozzle to dispense patterns of modeling material according to a shape of an object, wherein each batch is associated with one of said containers but not with any other of said containers, and wherein no batch is executed before a container associated with a previously executed batch is emptied.

7 . The system according to claim 6 , wherein said controller is configured to select between a first printing mode at which said series of printing instruction batches is executed, and a second printing mode at which at least one of said containers supplies modeling material before another one of said containers is empty.

8 . The system according to claim 7 , wherein said controller is configured to automatically select said first mode when said modeling material containers comprise the same modeling material.

9 . The system according to claim 7 , wherein said controller is configured to automatically select said second mode when said modeling material containers different modeling materials.

10 . The system according to claim 7 , wherein said controller is configured to select between said first and said second printing modes based on a user input.

11 . The system according to claim 6 , wherein said three-dimensional printing apparatus comprises a plurality of separate nozzle arrays, each separately connected to a single container of said containers, wherein each batch comprise printing instructions for said controller to operate a single nozzle array.

12 . A method for three-dimensional printing, comprising:

receiving working hours of personnel operating a three-dimensional printing apparatus having a building material container;

receiving three-dimensional printing data describing an object;

calculating based on said data, a supply period during which said container is expected to be emptied;

transmitting to said apparatus a signal to initiate printing of said object at a delayed time selected to ensure that an end time of said supply period is within said working hours;

wherein said apparatus comprises a plurality of containers, each supplying a different building material, and wherein the method comprises calculating the supply period, separately for each container, thereby providing a plurality of supply periods, and transmitting to said apparatus the signal to initiate said printing at the delayed time selected to ensure that the end time of each of said supply periods is within said working hours.

13 . The method according to claim 12 , wherein said calculating said supply period is based on a predetermined total amount of material in said container.

14 . The method according to claim 12 , comprising receiving input pertaining to an amount of material in said container, wherein said calculating said supply period is based on said input amount.

15 . The method according to claim 14 , wherein said receiving said input is by a user interface.

16 . The method according to claim 14 , wherein said receiving said input comprises receiving from said apparatus a signal indicative of said amount.

17 . The method of claim 12 , wherein there is a plurality of building material containers and said building materials are modeling materials, and the method comprises:

selecting a container of said plurality of building material containers;

executing a batch of printing instructions to control at least one printing nozzle to dispense modeling material from said selected container in patterns corresponding to a shape of an object; and

when said selected container is empty, selecting another container from said plurality of modeling material containers, and repeating said execution of said batch of printing instructions for said other container.

18 . The method according to claim 17 , comprising selecting between a first printing mode at which said batch of printing instructions is executed separately for each container, and a second printing mode at which at least one of said containers supplies modeling material before another one of said containers is empty.