Below are some common issues you may encounter with UV resin printing and their potential solutions:
Adhesion Problems
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Burn-in Layer on Build Plate but Rest is Missing: This is likely due to under-exposure, as burn-in layers are always set to over-cure. Note that not all colors perform the same, even if they are from the same brand and type. This issue usually occurs with transparent color resin.
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Burn-in Layer and Supports Printed but Rest is Missing: This could be due to incorrect orientation or insufficient supports. It is recommended to rotate your model to nearly vertical and tilt it 5-20 degrees. As a rule of thumb, start with lightweight supports and increase density before using heavier supports. Note that printing in a near-horizontal position will increase suction force during lifting, and resin trapped between the print and burn-in layer will further worsen the issue due to additional weight.
Deformation
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Resin Accumulated at the Root of Supports on the Print Surface: This is likely caused by support density or poor orientation of the model. Set the model to 5-20 degrees from vertical and reduce the number of supports. Also, reduce the lift speed. If the minimum density is required to keep the print hanging, use heavier supports. Add a few heavier supports at the lowest point (nearest to the build plate).
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Model Appears Longer than Intended: Reduce lift speed and add extra support if necessary.
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Obvious Layer Lines: This is caused by excessive suction force. Reducing lift speed or adding extra drain holes may help. Consider increasing the light-off delay, as higher viscosity resin may take longer to settle after the previous lifting process. Maintaining a relatively warm environment will also improve print quality.
Hints: Most issues can be resolved by reducing lift speed, adding more supports, creating drain holes, increasing light-off time, or re-orienting the model. If these solutions do not help, it is likely that the particular resin is not suitable for your design due to its viscosity. You may also check your generated print file with “UVtools” to see if there is any “island” exist. (Island, unreachable state during your printing.)
