Combing keeps the print head within the interior of the print while traveling from one point in the print to another. The printer won’t retract on these points and will simply do a travel move. This reduces the number of retraction moves but will increase the travel distances. If combing is disabled the print head will move straight from one point to another, choosing the shortest route, and will always retract.
Avoid printed parts
By enabling this setting the print head will avoid printed parts when traveling. When the shortest route from one point to another in the print is ‘blocked’, the print head will move around it. This decreases the chance of hitting or oozing on an already printed part and therefore increases the final quality of the model.
This setting defines the distance between the nozzle and print when the print head is avoiding already printed parts. The higher the value, the lower the chance of oozing or hitting the printed model. Nonetheless, a high value will significantly the length of the travel moves and thus the print time.
Layer start X-Y
This setting defines the position closest to these coordinates to start the next layer. The setting is normally set to the far right corner because that is where the Ultimaker 3's switching bay is located.
Note: This is a different setting than the Z-seam. The z-seam alignment setting only adjusts the start position of the outer wall, where this setting normally starts at the infill.
Z-Hop when retracted
With this setting, the build plate will move down by the set value when a retraction is done, allowing the print head to travel over the print without the nozzle touching it. This prevents the nozzle from hitting the object or leaving “blobs” or scratches on the print surface. Please note that for prints with lots of retractions/travel moves, this can significantly increase the print time and stress on the Z-stage.
Besides the above settings, there are a few material settings that are specifically available for the Ultimaker Original+ and Ultimaker Original. Other Ultimakers have these settings in the printer.
Z-hop only over printed parts
In the 'Travel' category is an option 'Avoid printed parts'. The nozzle will avoid these parts if possible to reduce scarring. When there is no way to avoid the part the printer will perform a z-hop when traveling over a printed part.
The height in millimeters at which all Z-hop moves are performed.
Z-hop after extruder switch
This feature causes the printer to perform a Z-hop when the nozzle is switched. It decreases the chance of oozed material to hit the printed model.