Cura Dual Extrusion handling, and settings.

[Engineero 0]

First time on the forums, but have been using CURA for about a year now, and I love it.

 

I have some questions though about CURA when Dual Extruding.

 

I use a Geeetech A20M dual filament feed, 2-1 mixing hotend printer. Which has no Cura Machine Profile.

Cura version is 4.2.1

 

1. How do I clone the Profile settings from Extruder1 to Extruder2 ?

 

I use matching brand and type of PLA and POM alot, but cloning the settings that work great for the left extruder (Tab 1) over to the right extruder (Tab 2).

Doing it manually takes time, and I always wonder if I missed something from #1 settings over to #2 settings.

 

Also having Issues with the circular Prime Tower, I always have to purge out about 15mm to get a clean purge so the next filament can prime and be clean of ooze or anything in the hotend.

 

The Prime tower when switching to the second feeder filament does not build on top of the prime tower built with the first feeder, it tries to build in empty space at the Z height, but it is inset inside the prime tower instead of stacking on top of the first print layer's tower.

 

I also have an issue when doing dual extrusion when it tries to print a brim around the tower and first layer of my print.

 

It uses the 3 lines of brim with Extruder1 filament, then it switches to the other extruder and does a final outside brim line of the other filament and immediately starts printing without purging before switching back to the first defined section of the print, so I end up with a blob or the other filament initially on my first layer.

 

In the profile settings, both extruder 1 and extruder 2 are set to print both brim and first layer with extruder 1. So its a little confusing.

 

This does not occur when I disable brim settings.

 

Thanks for your time.

Edited September 24, 2019 by Engineero

[GosseAdema 0]

"The Prime tower when switching to the second feeder filament does not build on top of the prime tower built with the first feeder, it tries to build in empty space at the Z height, but it is inset inside the prime tower instead of stacking on top of the first print layer's tower."

 

Also happens in Cura 4.3.0

mp4.zip

[Engineero 0]

Are they going to fix this?

Because the end result is a failed purge and it typically drags the leftovers from the prime tower back into my print..

 

Thus giving me a failed ugly final print.

 

Does anyone know a workaround?

Are the CURA developers aware of the issue?

 

[Smithy 1,146]

23 minutes ago, Engineero said:

Are the CURA developers aware of the issue?

 

I can't say that, but Cura bugs should be reported to Github to ensure tracking etc.. The link can be found in the Cura help menu.

[marcottt 0]

i found more bug with 2 material and cura,  i found (ONLY ON 1st layer) after print with material #1 start with material #2 without prime it on tower (i have an y bowden with 2 motors and 1 nozzle) so i have a lot of dirty material. Cura dev say is a feature........