Flush volumes and orientation: Something that might interest everyone here! (Patreon)

See in the pics 3 examples of the same piece printed with 3 different settings.

Before starting explaining, let me introduce the basic knowledge.

Flush volumes: What are these and where can I find them (at least on Bambu Studio, but should be similar in the other slicers too)

"Flush volumes" indicate the amount of purge that a filament that is in the hotend must undergo before changing to the next filament and starting again printing. Very easily put!

This amount can be very little when passing from a light color to a dark one or very high when passing from a dark or pawerful bleeding (a red or a black for instance) color to a lighter or weaker one. Matte filament can be used to overcome the "bleeding" (or smearing) but a right flush volumes checking is always necessary.

I usually use 700 or more (in the image just screenshooted you can see 900 ahahah) between black and white to print eyes for example, so that the white is not stained by the black! In this same image you can see that from red to yellow there is 619...it's ok when using matte filament but use a little higher amount if you have basic filaments.

ORIENTATION OF THE PIECE ON THE BED

We love printing flat on the bed...pieces have more adhesion, prints usually don't fall or fail, printing is quicker...but sometimes tilting a piece and using good supports can make a big difference.

PICS IN THE TOP IMAGE

First one printed flat on the bed with 0,12 layer height ( not too much attention to print volumes either) basic filament, a little translucent (sunlu pla+ actually)

Top piece, second from the left, printed with matte bambu and aurapol pla, but with 0,2 layer height and not too much attention to flush volumes (purge not too low anyway).

third piece printed with matte filament at 0,2 layer height, but tilted and with adjusted flush volumes between red and yellow.

Judge yourself... the third one is better, takes more time and filament, but definitely more clean results...

I could do many more examples of why is always wise to check the flush volumes...

We learnt the lesson well :D

This other is an example also of flush into object I think... another "bad printing" lesson 😓