Grunnleggende 3D-utskrift: Ooze Shields

Depending on the slicing software you use, if you have a dual- or multi-extruder 3D printer, you may notice that your prints come out with a one-layer thick shell surrounding them. This shell is called an ooze shield and is enabled by default in several slicing software suites for multi-extruder printers because it’s beneficial at keeping the surface of your print clean.

Et ooze-skjold er ganske selvforklarende; den gjør det navnet antyder og beskytter utskriften din mot sive problemer. , Hovedformålet er å fortrinnsvis fange opp eventuell væske fra en hvilken som helst dyse før den treffer og fester seg til utsiden av selve utskriften. Ved å skrive ut ooze-skjoldet som første del av hvert lag, blir den aktuelle dysen grunnet, klar til umiddelbar bruk.

Et siveskjold fanger sive fra skriveren, og forhindrer at det påvirker utskriften. Bildekilde: core-electronics.com.au

Hvorfor er det et slikt problem å siver for multi-ekstruderskrivere?

Oozing happens when a nozzle isn’t in use. This is why it’s so much more of an issue for dual- or multi-extruder printers than for single extruder printers. A single extruder is almost always in use, with rare retractions. In a multi-extruder printer, often only one can be used at a time, meaning at least one extruder is sat idle.

When the extruder is idling, the nozzle is still hot, and the filament is still kept there. With the already molten filament being heated further, it gets runnier until it oozes out of the nozzle.

To some degree, oozing can be countered with retraction. This is where the extruder pulls the filament back when it’s not being used. By keeping it further away from the nozzle, it’s harder for it to ooze. In reality, though, it’s almost impossible to get the perfect balance between no oozing and having the filament primed and ready to print. An ooze shield primes the nozzle at the start of each layer whilst also protecting your print from oozing.

The main downside of using an ooze shield is that it consumes extra filament. If you want the exterior of your print to be perfect, however, then this is likely your best choice. Once your print is complete, the ooze shield should easily detach from the print bed. The small contact area generally makes this easy; it then easily slides off the actual print underneath without touching it.

Conclusion

Ooze-skjold er et flott verktøy for å beskytte utskriftene dine mot sive-relaterte gjenstander. Har du noen tips å dele for ose-skjoldinnstillinger? Del dem gjerne nedenfor.