Abstract: Examples include a method implemented in a three dimensional printing system wherein a print job comprising a plurality of parts to be printed is received. A part feature intended to be printed in a specific print mode is identified, wherein the specific print mode is customized for the part feature. The print job is executed using the specific print mode for the part feature. The use of the specific print mode is monitored.

Abstract: In some examples, a system receives measurement data from measurements of first three-dimensional (3D) parts formed on a build bed of an additive manufacturing machine with different contone levels of a liquid agent, and determines, based on the measurement data, geometrical deviations of the first 3D parts from a baseline geometrical property. The system generates, based on the determined geometrical deviations, a model that correlates contone levels of the liquid agent to corresponding geometrical deviations, the model for use in an adjustment of the liquid agent based on a contone level adjustment to compensate for a geometrical deviation when building second 3D parts with the additive manufacturing machine or another additive manufacturing machine.

Abstract: Taping apparatus (27) has a body (3) with a mouth (3a) opening to one side radially of an axis (A). A head (1, 5, 16) having a mouth (3a) radial of the axis (A) is mounted for rotation about the axis (A) on the body (3) and has a gear disposed around the head in meshing engagement with two gears (17) mounted on the body. The gears (17) are both in mesh with a gear (9) rotated by a gear (11) driven by motor (12) thus to rotate the head. A tape reel (28) is carried by chuck (6) rotatably disposed on an axle (8) on the head for rotation about an axis (B) parallel with the axis (A). A counterbalance (4) is mounted on the head (1, 5, 16) opposite the chuck (6) on axle (8) comprising a weight (2) movable towards and away from the axis (A) and a roller (26) urged by a spring (24) against the outermost layer (28a) of the tape on reel (28) thereby detecting the diameter of tape carried by the reel (28) thus to move the weight (2) to a position to substantially counterbalance the reel as it rotates.