Deviant control in additive manufacturing

An additive manufacturing process, comprising:

• making a slice of an object based on process control data, including dispensing a quantity of each of multiple liquid functional agents on to a layer of fusable build material according to the process control data and then irradiating the layer of build material;
• determining if there is a hot region in the slice;
• if it is determined there is a hot region in the slice, then modifying the process control data to dispense a different quantity of at least one of the functional agents at a location corresponding to each hot region to cool the slice at that location;
• determining if there is a cold region in the slice;
• if it is determined there is a cold region in the slice, then modifying the process control data to dispense a different quantity of at least one of the functional agents at the location of each cold region to heat the slice at that location;
• and
• repeating the making, determining, and modifying for succeeding slices until it is determined that there are no hot regions and no cold regions.

A processor readable medium having instructions thereon that when executed cause an additive manufacturing machine to:

• make an object based on process control data, including to dispense a quantity of each of multiple liquid functional agents on to a fusable build material in a pattern to form patterned build material and to irradiate the patterned build material;
• while making the object, measure temperatures at multiple locations in the object;
• map the measured temperatures to form a temperature map of the object;
• modify the process control data based on the temperature map to form modified process control data;
• and
• make the object again based on the modified process control data, including to dispense a different quantity of at least one of the functional agents on to the build material.

An additive manufacturing machine, comprising:

• a layering device to layer build material over a work area;
• an agent dispenser to dispense a fusing agent and multiple coloring agents on to layered build material;
• a fusing lamp to irradiate patterned build material;
• a thermal imaging device to map temperatures in fused build material;
• and
• a controller operatively connected to the layering device, the agent dispenser, the fusing lamp and the thermal imaging device to:
• layer build material over a work area;
• dispense a first quantity of each of the fusing agent and a coloring agent on to a layer of build material in a pattern corresponding to an object slice;
• irradiate the patterned build material to fuse build material into the slice;
• map temperatures in the slice;
• identify any regions of low temperature in the slice and any regions of high temperature in the slice;
• repeat the sequence of layering, dispensing, irradiating, mapping and identifying for multiple successive layers of build material to make the object;
• and then make the object again layer by layer and slice by slice including dispensing a second quantity different from the first quantity of the fusing agent and/or the coloring agent into the regions of low temperature and into the regions of high temperature.