Dual exstrusion #3DBenchy printed with DIY 2 into 1 hotend
While you have removed the alignment issues of a multihead design, it seems like there’s a lot of wastage in purging.
Some people use a similar amount of material to purge & prime dual nozzles though.
I did not know that.
I’d say the bigger challenge being overcome with 2-into-1, as against dual nozzle, is nozzle dribble. Nozzle dribble is challenging to eliminate and a cause of print quality issues (in my experience and experimentation). There seems to be no more wastage than with a dual-nozzle setup using the same prime tower method to swap colours. For a larger two-colour print, the amount of priming material will not change, so less wastage as a % of material used in the job (unlike an “ooze shield” approach to colour change-over).
@Jan_erik_Halvorsen I’m sure you’ve figured that once you are happy with the performance of the purging/colour change sequence, you will be able to reduce the amount of material used in the priming change-over by reducing “Pillar Width” in Prime Pillar settings (Additions Tab), reducing the prime pillar area.
Nice work and development progress.
Size of the prime pillar depends on inside volume of the nozzle and layer thickness. This print was not so good because the nozzle was bad. I made a new nozzle using less volume now and has started a new 3DBency print using a smaller prime pillar (12x12mm)