Printing method for shielding component of 3D model, and calculating method for printing start point of shielding component

A printing method for shielding component of 3D model, used for a 3D printer printing a shielding component (4) of a 3D model (40), the method comprising:

• a) obtaining all candidate printing points of a first printing loop (41) of a first printing layer (11) of the shielding component (2), wherein all concave points (12) of the first printing loop (41) of the first printing layer (11) are used as the candidate printing points of the first printing loop (41) of the first printing layer;
• b) choosing one of the candidate printing points obtained in the first printing loop (41) to be a printing start point (411) of the first printing loop (41);
• c) controlling the 3D printer to start printing the first printing loop (41) from the printing start point (411) of the first printing loop (41);
• d) ensuring a printing start point (421) of a next printing loop (42) of the printing layer (11), wherein the next printing loop (42) has a plurality of printing points, the printing start point (421) of the next printing loop (42) is a printing point closest to the printing start point (411) of the printing loop (41) last printed of the plurality of printing points;
• f) controlling the 3D printer to start printing the next printing loop (42) from the printing start point (421) determined in step d);
• and
• g) executing step d) to step f) again when determining that the currently printed printing loop (42) is not a last printing loop of the printing layer (11) being the same;
• h) determining if the printing layer (11) currently printed is a last printing layer (11) of the shielding component (4);
• i) obtaining all candidate printing points of the first printing loop (41) of a next printing layer (11) of the shielding component (4) when the printing layer (11) currently printed is not the last printing layer (11) of the shielding component (4), wherein all concave but suspending points of the first printing loop (41) of the next printing layer (11) are excluded from the candidate printing points of the first printing loop (41) of the next printing layer (11), and all concave and non-suspending points of the first printing loop (41) of the first printing layer (11) are used as the candidate printing points of the first printing loop (41) of the next printing layer (11);
• j) using a candidate printing point closest to the printing start point (421) of the last printing loop (42) of the printing layer (11) last printed, to be a printing start point (411) of the first printing loop (41) of the next printing layer (11), wherein the candidate printing point is one of the candidate printing points obtained in step i);
• k) controlling the 3D printer to start printing the first printing loop (41) of the next printing layer (11) from the printing start point (411) determined in step j);
• l) executing step d) to step q) again;
• and
• m) completing printing the shielding component (4) when the printing layer (11) currently printed is the last printing layer (11) of the shielding component (4).

A calculating method for printing start point of shielding component of 3D model, the method comprising:

• a) obtaining all candidate printing points of a first printing layer (11) of the shielding component (2), wherein all concave points (12) of the first printing layer (11) are used as the candidate printing points of the first printing layer (11);
• b) choosing one of the candidate printing points obtained in step a) to be a printing start point (211) of the first printing layer (11);
• c) obtaining all candidate printing points of a next printing layer (11) of the shielding component (2), wherein all concave but suspending points of the next printing layer (11) are excluded from the candidate printing points of the next printing layer (11), and all concave and non-suspending points of the next printing layer (11) are used as the candidate printing points of the next printing layer (11);
• d) choosing one of the candidate printing point obtained in step c) closest to the printing start point (211) determined in step b), to be a printing start point (211) of the next printing layer (11);
• e) ensuring if a last printing layer (11) of the shielding component (2) is processed in step d);
• and
• f) executing step c) to step e) again if the last printing layer (11) of the shielding component (2) is not processed in step d).