A print module includes: a cradle defining a longitudinal cavity and an access opening at a first end of the longitudinal cavity; an elongate printhead positioned in the longitudinal cavity; and a guide positioned at the access opening, the guide having an upper surface configured for guiding the printhead into the longitudinal cavity without contacting an ink ejection face of the printhead. The printhead is removable from the cradle via longitudinal sliding movement of the printhead through the access opening.

An apparatus including a dot matrix transfer head that includes an impact wire housing. A plurality of impact wires are disposed within the impact wire housing and extend out of the impact wire housing. A splaying element attached to a bottom surface of the impact wire housing. The plurality of impact wires extend into and through the splaying element. A guide head attached to a bottom surface of the splaying element. The guide head includes multiple holes that arrange the plurality of impact wires in a matrix configuration. The splaying element is designed to direct the plurality of impact wires toward the multiple holes in the guide head.

An apparatus including a dot matrix transfer head that includes an impact wire housing. A plurality of impact wires are disposed within the impact wire housing and extend out of the impact wire housing. A splaying element attached to a bottom surface of the impact wire housing. The plurality of impact wires extend into and through the splaying element. A guide head attached to a bottom surface of the splaying element. The guide head includes multiple holes that arrange the plurality of impact wires in a matrix configuration. The splaying element is designed to direct the plurality of impact wires toward the multiple holes in the guide head.

An example method is described in which a property is measured associated with a vertical displacement of a supporting frame of a printing system, the printing system having a floating frame mounted on the supporting frame, and the floating frame comprising a position sensor of the printing system and a nozzle to eject a drop of print agent; an orientation of the floating frame is adjusted with respect to the supporting frame based on the measured property.

An example method is described in which a property is measured associated with a vertical displacement of a supporting frame of a printing system, the printing system having a floating frame mounted on the supporting frame, and the floating frame comprising a position sensor of the printing system and a nozzle to eject a drop of print agent; an orientation of the floating frame is adjusted with respect to the supporting frame based on the measured property.

According to examples, an apparatus may include a processor and a memory on which are stored machine readable instructions. The instructions, when executed by the processor, may cause the processor to access a property value respectively corresponding to each of a plurality of firing actuators in a printing system and determine a count of the firing actuators having property values that are outside of a predefined threshold value range. Based on the count exceeding a predefined maximum threshold value, the instructions may cause the processor to determine locations of the plurality of the firing actuators having property values that are outside of the predefined threshold value range, determine a standard deviation of the determined locations, and based on the determined standard deviation being below a predetermined threshold, output an indication concerning a potential printhead strike.

A print module including: a cradle having a longitudinal cavity; an elongate printhead assembly positioned in the longitudinal cavity; and a supply assembly slidably movable relative to the cradle along an axis perpendicular to a longitudinal axis of the printhead assembly, the supply assembly having one or more ink couplings for fluidic connection to a printhead of the printhead assembly. The cradle includes a fixed limiter configured for abutment with a reaction plate of the printhead assembly so as to limit movement of the printhead assembly during movement of the supply assembly away from the printhead assembly.

A print engine includes: a chassis; a cradle attached to the chassis, the cradle defining a longitudinal cavity having an access opening at a first end thereof; an elongate printhead received in the longitudinal cavity via the access opening; and a wiper carriage configured for longitudinally wiping the printhead. The wiper carriage is parked at a second end of the cradle opposite the first end.

A print module includes: a cradle having a nest for receiving a printhead; an elongate printhead assembly received in the nest, the printhead assembly including a printhead having first and second ink ports at opposite longitudinal ends thereof; and a supply assembly slidably movable relative to the nest along an axis perpendicular to a longitudinal axis of the printhead. The supply assembly includes first and second ink couplings fast with the supply assembly and connected to respective first and second ink ports. The print module is configured such that movement of the supply assembly disconnects the second ink coupling prior to disconnection of the first ink coupling.

A method of engaging a supply module with a printhead includes the steps of: moving an actuator handle in a first motion along a first axis, thereby linearly sliding the supply module along the first axis towards the printhead and engaging ink couplings of the supply module with complementary ink ports of the printhead; and moving the actuator handle in a separate second motion along a second axis perpendicular to the first axis, thereby moving a PCB of the supply module towards the printhead and engaging PCB contacts with complementary printhead contacts.