A printing device comprising: a carriage slidably mounted on a carriage rail, the carriage configured to move along the carriage rail, the carriage comprising a number of pens coupled to the carriage; and a selectable drive system comprising: a scan drive system configured to drive components of a scanning device; a drive selector assembly comprising a selector swing arm; a shifter configured to selectively shift the drive selector assembly between a scanning system drive position of the selector swing arm and a printing system drive position of the selector swing arm; the selectable drive system being characterised by: a capping system having a capped state to cap the number of pens coupled to the carriage;,the drive selector assembly being configured to select between driving the capping system to an uncapped position or driving the scan drive system depending on a position of the selector swing arm; and a feedshaft configured to provide torque to the drive selector assembly wherein the shifter is coupled to the feedshaft, and wherein the shifter is configured to place the printing device in a printing and uncapped state or in a scanning and capped state based on a direction of rotation of the feedshaft. a carriage slidably mounted on a carriage rail, the carriage configured to move along the carriage rail, the carriage comprising a number of pens coupled to the carriage; and a selectable drive system comprising: a scan drive system configured to drive components of a scanning device; a drive selector assembly comprising a selector swing arm; a shifter configured to selectively shift the drive selector assembly between a scanning system drive position of the selector swing arm and a printing system drive position of the selector swing arm; the selectable drive system being characterised by: a capping system having a capped state to cap the number of pens coupled to the carriage;,the drive selector assembly being configured to select between driving the capping system to an uncapped position or driving the scan drive system depending on a position of the selector swing arm; and a feedshaft configured to provide torque to the drive selector assembly wherein the shifter is coupled to the feedshaft, and wherein the shifter is configured to place the printing device in a printing and uncapped state or in a scanning and capped state based on a direction of rotation of the feedshaft. a scan drive system configured to drive components of a scanning device; a drive selector assembly comprising a selector swing arm; a shifter configured to selectively shift the drive selector assembly between a scanning system drive position of the selector swing arm and a printing system drive position of the selector swing arm; the selectable drive system being characterised by: a capping system having a capped state to cap the number of pens coupled to the carriage;,the drive selector assembly being configured to select between driving the capping system to an uncapped position or driving the scan drive system depending on a position of the selector swing arm; and a feedshaft configured to provide torque to the drive selector assembly wherein the shifter is coupled to the feedshaft, and wherein the shifter is configured to place the printing device in a printing and uncapped state or in a scanning and capped state based on a direction of rotation of the feedshaft. a capping system having a capped state to cap the number of pens coupled to the carriage;,the drive selector assembly being configured to select between driving the capping system to an uncapped position or driving the scan drive system depending on a position of the selector swing arm; and a feedshaft configured to provide torque to the drive selector assembly wherein the shifter is coupled to the feedshaft, and wherein the shifter is configured to place the printing device in a printing and uncapped state or in a scanning and capped state based on a direction of rotation of the feedshaft.