Question Cura prime tower wipe capability and UM3 wipe behavior

[ansonl 20]

Hi, Does Cura have the capability to raise the bed to the inactive nozzle height after printing the active nozzle layer on the prime tower and before the horizonal wipe movement? If it could, this may also eliminate the need for an ooze shield because the ooze would be wiped into the prime tower before the printhead moves back to the print. 

 

I am trying to tune a printer definition for the Ultimaker DXU modification that has offset switching nozzles. The inactive nozzle is moved 2mm higher than the active nozzle to prevent oozing. Right now when the prime tower is created, the printer does a wipe horizontally to catch oozing from the inactive nozzle after extruding the current layer of the prime tower from the active nozzle.

This works for printers with fixed dual nozzles that have no ability to raise the inactive nozzle as the inactive nozzle is already on the same Z height as the prime tower and gets wiped as it travels over the prime tower wall. 

I am currently using M218 on Marlin to handle the hotend offset and was wondering how the Ultimaker 3 handles wiping its raised inactive nozzle.

 

I couldn't find any sign of Z offset settings for Cura prime tower nor anything on the printer definition page. I found a machine_nozzle_head_distance on the um3 extruder definition file which has no explanation in the main fdmextruder definition. 

 

Does anyone know if Cura can adjust Z for the prime tower or what machine_nozzle_head_distance  does? Thanks. 

 

@yyh1002

 

 

Edited October 5, 2022 by ansonl