Regular cleaning of Ultimaker print cores is essential to achieve optimal printing outcomes. Occasionally, material can become trapped within the nozzle, leading to deterioration. This issue can result in extrusion complications or a complete blockage of the print core. Certain materials, like PVA and composite variants, are more susceptible to degradation and subsequent nozzle blockages.
To effectively cleanse the interior of the print core, employing both hot and cold pulls is the most effective approach. This technique is advised as a preventive measure based on printing hours or when transitioning between materials with distinct colors or printing temperatures. Additionally, it can serve as corrective maintenance in the event of extrusion difficulties.
Hot pulls are utilized to expel larger portions of deteriorated material from the print core and are essential when a core is obstructed. Subsequently, a cold pull removes any residual minuscule particles, ensuring thorough cleanliness within the print core.
While Ultimaker cleaning filament is recommended, alternative non-flexible materials such as PLA can also suffice.