Material supplying device, three dimensional molding device, and injection molding device

A material supplying device comprising:

• a plasticizing section configured to plasticize a material to generate a plasticization material;
• a nozzle configured to supply the plasticization material to outside;
• a supply control mechanism that is provided in a flow path communicating with the plasticizing section and the nozzle and that is configured to adjust supply amount of the plasticization material from the nozzle to outside;
• a pressure sensor configured to measure the pressure of the plasticization material in the flow path;
• and
• a control section configured to control operation of the supply control mechanism, wherein
• the control section is configured to calculate a backlash value indicating backlash of the supply control mechanism based on detection data including a detection value output from the pressure sensor and
• the detection data is data including, in time series, the detection values output from the pressure sensor in at least a part of a period during a first operation of using the supply control mechanism to reduce the supply amount of the plasticization material from the nozzle and a period during a second operation of using the supply control mechanism to increase the supply amount of the plasticization material from the nozzle.