Printhead including coanda catcher with grooved radius

A printhead comprising:

• a jetting module including a linear array of nozzles extending in a direction along a length of the jetting module, the jetting module being configured to form liquid drops travelling along a first path from a plurality of liquid jets emitted from the nozzles;
• a deflection mechanism configured to cause selected liquid drops formed by the jetting module to deviate from the first path and begin travelling along a second path;
• and
• a catcher positioned to intercept liquid drops travelling along one of the first path and the second path, the catcher including a drop contact surface and a liquid removal conduit connected in fluid communication with each other by a catcher surface including a radial surface including an array of grooves, the liquid removal conduit including a surface that is positioned opposite and spaced apart from the radial surface that includes the array of grooves such that the opposite surface of the liquid removal conduit does not contact the radial surface that includes the array of grooves.