When should you revalidate your 3Dresyns® printing workflow?
This page explains when a previously working print workflow should be checked again instead of being reused without review.
Purpose: help users understand when a change is large enough to require renewed verification, recalibration or validation.
Revalidation is not a sign that the material is unreliable. It is a normal engineering response when important variables in a multivariable process have changed.
1) Why revalidation matters
A stable workflow depends on more than one number
3Dresyns® materials are processed within a full material–printer–process–post-processing chain. If an important part of that chain changes, the old process window may no longer behave in the same way.
For this reason, users should not ask only whether a previous setting still exists. They should ask whether the previous workflow conditions are still materially comparable.
2) Situations that usually require revalidation
Review these changes carefully
You changed the printer
Different printers may deliver different real light power, different optical behaviour and different mechanical separation behaviour, even when they belong to the same technology family.
You changed the layer height
Changing layer height changes the required cured depth and may move the correct exposure window. A previously valid exposure may no longer be appropriate.
You changed the LCD, optics or exposure engine
Any change in the optical system may alter real curing conditions and should be treated as a revalidation event.
You changed light power or intensity
If the effective curing energy changes, the selected exposure logic may need to be reviewed. This includes intentional light-intensity adjustment and unintentional power drift over time.
You changed the resin condition
Changes in resin state, homogeneity, temperature history or other practical material conditions may affect print behaviour and should not be ignored.
You changed washing, drying or post-curing
Even when printability appears similar, changes in post-processing may significantly alter final part behaviour and application suitability.
You changed support or slicing strategy
Changes in support logic, orientation, separation conditions or slicing workflow may alter how the part behaves during printing.
3) Situations that may need at least a structured check
Do not ignore smaller changes
Not every change requires a full restart of the workflow, but some changes should still trigger a controlled review.
- printer has accumulated significant operating time,
- ambient temperature changed significantly,
- printing performance became less stable,
- feature quality changed unexpectedly,
- adhesion behaviour changed without an obvious cause.
If the print no longer behaves as expected, do not assume the old workflow is still valid just because the nominal settings were not changed.
4) What revalidation should mean in practice
Revalidation does not always mean starting from zero
The correct response depends on the size and importance of the change.
Simple re-check
- review the changed variable,
- print a calibration geometry,
- confirm that the workflow still behaves as expected.
Structured revalidation
- review IFU guidance,
- use a fast CRT if exposure behaviour may have changed,
- validate again with 3Dtest1 and 3Dtest2,
- confirm the post-processing route where relevant.
5) When full revalidation is strongly recommended
Restart the structured route when the process conditions changed materially
Full revalidation is strongly recommended when the old workflow cannot reasonably be considered equivalent to the new one.
- new printer or new optical system,
- new wavelength family or new exposure environment,
- major layer-height change,
- large shift in power or irradiance behaviour,
- major change in post-processing route,
- application-critical or performance-critical parts.
6) Useful next pages
Use revalidation together with these documents
Governing principle
When an important process variable changes, the correct response is not blind reuse of the old settings. The correct response is structured verification and, where needed, structured revalidation.
Need technical support?
For support with recalibration, workflow review or revalidation strategy, contact info@3dresyns.com.