FIG. 1 is a perspective view of a 3D printer showing my new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a top plan view thereof; and
FIG. 7 is a bottom plan view thereof;
FIG. 8 is a partial enlarged view of portion 8 shown in FIG. 1;
FIG. 9 is a partial enlarged view of portion 9 shown in FIG. 1;
FIG. 10 is a partial enlarged view of portion 10 shown in FIG. 1;
FIG. 11 is a partial enlarged view of portion 11 shown in FIG. 1;
FIG. 12 is a partial enlarged view of portion 12 shown in FIG. 1;
FIG. 13 is a partial enlarged view of portion 13 shown in FIG. 1;
FIG. 14 is a partial enlarged view of portion 14 shown in FIG. 1;
FIG. 15 is a partial enlarged view of portion 15 shown in FIG. 1;
FIG. 16 is a partial enlarged view of portion 16 shown in FIG. 2;
FIG. 17 is a partial enlarged view of portion 17 shown in FIG. 2;
FIG. 18 is a partial enlarged view of portion 18 shown in FIG. 3;
FIG. 19 is a partial enlarged view of portion 19 shown in FIG. 3;
FIG. 20 is a partial enlarged view of portion 20 shown in FIG. 3;
FIG. 21 is a partial enlarged view of portion 21 shown in FIG. 3;
FIG. 22 is a partial enlarged view of portion 22 shown in FIG. 3;
FIG. 23 is a partial enlarged view of portion 23 shown in FIG. 4; and,
FIG. 24 is a partial enlarged view of portion 24 shown in FIG. 5.
The broken lines show portions of a 3D printer that form no part of the claimed design.