PVA Print Cores
Use nozzles that are appropriate for PVA filament, The Ultimaker 3 features swappable Print Cores that are designed for PVA material. The all-in-one design contains the heater block, sensors and nozzle all in one package. This makes maintenance low and speeds up prototyping workflow. The BB 0.4mm and BB 0.8mm print core is also known as the Support Core, specifically designed for PVA.
You can find our PVA print settings on our GitHub as well as all of the settings we used linked below:
Clean and Calibrate Nozzles
Before printing, make sure to clean both nozzles with the hot and cold pull methods. This will minimize nozzles from clogging from any material that heats aways will inactive.
We'll also want to calibrate the nozzles to ensure the x and y offsets correctly align to each other.
Before printing, make sure to calibrated the nozzles to ensure the x and y offsets correctly align to each other.
We used .1mm layer height with the .25mm nozzle to get a pretty fine details on the numbers and frames.
To speed up print times, we modeled the parts to scale down %50 without the frame becoming too thin.
Tune down the "Maximum Retraction Count" to around 10 to decrease filament grinding.
We found that material can heat away but enabling a prime tower helped to keep the flow of filament consistent.
Enable Circular Prime Tower to optimize tools paths and increase the tower size to 20.
We can also enable wiping nozzles on the prime tower and increasing the purge volume to 1
Build Plate Adhesion
You’ll want to make sure to add a brim around the prime tower to make sure it stays in place while the nozzles take turn whipping excess material between switching.
Enable Brim on inside and outside by first unhiding it from the options. Click on the cog wheel icon next to the main title for any setting.
Untick the option to enable brim on outside and inside.