WHEN SWITCHING FROM ABS TO PLA/PVA FILAMENT
When you're using the ABS filaments in your DUAL extruder and you would like to switch it to the PLA+PVA combination, you should follow these steps to prevent your nozzle from clogging:
- Preheat the extruders to the 235 degrees Celsius.
- Feed BOTH extruders with PLA, until it flows constantly.
- Lower the temperature to 190 degrees Celsius and feed some more.
- Remove PLA from the desired extruder and feed it with PVA filament.
- Do not try to print PVA along with ABS filament – the temperature of the ABS will crystallize the PVA, and clog the nozzle.
- To use the attached preset, put the PVA into the right extruder.
- Do not print with PVA at high speeds. The best speed for it is around 20-30% and you can change it in the "project" tab in "extruder 2 speed".
- Always use the power raft with empty space set to 0, which would be printed with PVA (right extruder in the attached preset).
- Use the following support settings:
- After you generate the support structure, change its outline number to 1:
- tick the "object selection mode",
- LMB on the support structure,
- go to "outline" tab,
- click the padlock next to "outline count" parameter,
- change it to "1".
PVA filament is great for printing supports since it is water soluble. To get the PVA dissolved easily, follow these steps:
- Before putting the print into water, remove any excess PVA by hand (gently), as well as printed power raft and brim – this will quicken the process
- Use warm water only (cold water slows the dissolution process)
- You can use the ultrasonic cleaner if you have one, but remember – the water needs to be changed more frequently since the cleaning process produces a lot of heat
- Change the water as soon as it gets "thick" with dissolved PVA
- When the support structure is dissolved, dry the print thoroughly and remove any threads that are left using hot air and knife.