Attitude adjustment method

An attitude adjustment method for adjusting an attitude of a first heating unit in a three-dimensional modeling apparatus including

• a plasticizing unit producing a plasticized material by plasticizing a material,
• a nozzle ejecting the plasticized material,
• a stage having a modeling surface on which the plasticized material is stacked,
• a moving unit changing a relative position of the nozzle and the stage,
• the first heating unit in a plate shape having a heating surface heating the plasticized material stacked on the stage and a through hole formed therein, in which at least a part of the nozzle is located at modeling of a three-dimensional modeled object,
• a first supporting unit configured to change a relative position to the stage together with the nozzle and the first heating unit and placing the first heating unit in a position facing the stage by supporting the first heating unit, and
• an attitude changing portion configured to fix and change the attitude of the first heating unit, the method comprising:
• (a) fixing the attitude of the first heating unit by the attitude changing portion with the heating surface and the modeling surface or a jig provided in parallel to the modeling surface in contact in a first planar position;
• (b) measuring flatness of the heating surface by a planar sensor for measuring the flatness of the heating surface;
• (c) determining a second planar position where the heating surface and the modeling surface or the jig provided in parallel to the modeling surface are brought into contact based on the measured flatness;
• and
• (d) bringing the heating surface and the modeling surface or the jig provided in parallel to the modeling surface into contact and fixing the attitude of the first heating unit by the attitude changing portion in the determined second planar position with a change of the attitude by the attitude changing portion allowed.