Print settings for (not only) Harzlabs resins
Each printer requires individual settings
Even within one print model, different 3D printer settings may be required (this is especially noticeable when working with DLP technology). We have collected some information about 3D printer settings for better user comfort and to achieve the highest possible print quality.
Model testing
Any 3D printer setup must follow a certain technique that is based on the test model. In our practice, we use two test models to set print parameters. The first - a simple model with a quick print is necessary for coarse tuning, and the second for fine tuning. You can of course use your own models to set up the printer.
Layer thickness
Depending on the parameters of your printer, the thickness of the layer can vary from 4 μm to 300 μm. However, the most commonly used layer thickness values range from 20 μm to 100 μm. In addition to the resolution of the printer, it is also necessary to take into account the properties of the UV resins. Resins designed for printing in 100 μm and 20 μm layers are different and have different critical cure depths.
Accuracy of individual colors of HARZ Labs resins
- Red: Accurate; minimum height up to 40 μm
- Cherry: Highly accurate; minimum height up to 4 μm
- Transparent: Accurate; minimum height up to 40 μm
- White: Accurate; minimum height up to 40 μm
- Grey: Accurate; minimum height up to 40 μm
- Black: Highly accurate; minimum height up to 20 μm
Resin curing time
The curing time depends primarily on the type of UV source and its power. The lower layers require additional exposure. The general recommendation is to cure the first 4-8 layers 3-4 times longer than the next layers.
Z axis stroke height
The lift height of the Z table depends on many factors. However, the decisive factor is the type of printer. The minimum height of the table setting depends on the surface of the model. On the FEP film, the resin fully cures the layer and eventually stretches the FEP film behind the model.
Recommended lift height
- FEP 4-8 mm
A pause between enlightenment
The pause between lighting the next layer consists of two parts: The first part depends on the mechanics of the printer. The time required to raise and lower the table, as described in the first paragraph, affects. The second part depends on the viscosity of the resin. Less viscosity - shorter relaxation time after starting the table.
Pause between illumination according to resin viscosity
- Low viscosity: 0.2-0.5 s
- Medium viscosity: 0.5-1.5 s
- High viscosity: 1.5-10 s
A longer pause for resin with a high viscosity is necessary for the resin to flow perfectly under the model when the platform is raised.