Practical guide for entering 3Dresyns® printing parameters into CHITUBOX and Lychee Slicer for DLP, LCD and MSLA workflows
This page helps beginner users enter 3Dresyns® starting parameters into the most common software fields used in resin printing slicers.
Purpose: reduce setup errors, simplify first implementation and connect software profiles with the 3Dresyns® engineering methodology.
This guide should be used within a structured workflow connecting material selection, curing control, dimensional calibration, troubleshooting and post-processing validation.
1) What this guide does
Software parameter mapping for practical implementation
This document is a practical companion to the official 3Dresyns® IFU and Fast IFU. It does not replace them.
Its function is to help users identify:
- which software fields matter most for first successful printing,
- how 3Dresyns® starting parameters translate into CHITUBOX and Lychee fields,
- which settings should be adjusted first,
- which settings should remain secondary during early calibration,
- when to move from a quick software setup to structured CRT-based optimisation.
2) The most important settings
Start with the variables that control print success
For first implementation, most users should focus first on the following settings:
- Layer height
- Normal exposure time
- Bottom exposure time
- Bottom layer count
- Lift distance and lift speed
Most other fields should remain at stable, reasonable values during the first trials unless a specific resin system or printer requires otherwise.
- Layer height: typically 50–100 µm (0.05–0.10 mm)
- Normal exposure time: fast resins typically 1–10 s; slower or highly filled resins typically 10–20 s
- Bottom layers: typically 2–4 layers
- Bottom exposure time: typically 75–100 s
- Light-off delay: typically 0.1–0.5 s
- Lift distance: typically 5–10 mm
- Printing temperature: viscous resins may be warmed to 30–35 °C
Quick rule: start simple. Do not try to optimise every setting at the same time.
3) How 3Dresyns® parameters translate into slicer fields
Parameter mapping for CHITUBOX and Lychee
- 3Dresyns® layer height → Layer Height
- 3Dresyns® normal exposure time → Exposure Time or Normal Exposure Time
- 3Dresyns® bottom exposure time → Bottom Exposure Time
- 3Dresyns® bottom layer count → Bottom Layers or Bottom Layer Count
- 3Dresyns® lift distance → Lift Distance
- 3Dresyns® lift speed → Lift Speed
- 3Dresyns® retract speed → Retract Speed
- 3Dresyns® light-off delay → Light-off Delay or equivalent waiting/delay field
- Layer Height: thickness of each printed layer
- Exposure Time: curing time for standard layers
- Bottom Exposure: stronger first-layer adhesion exposure
- Bottom Layers: number of initial adhesion layers
- Lift Distance: separation travel after each layer
- Lift Speed: how strongly the part is peeled
- Retract Speed: return speed before the next exposure
- Light-off Delay: waiting time between motion and exposure
Recommended beginner logic
First establish a stable profile with layer height, exposure, bottom adhesion and moderate lift settings. Only then move to fine tuning.
4) Light power control for more stable printing over time
Using light-intensity control to maintain more constant effective irradiance
In some printer ecosystems, the slicer or printer workflow may allow the user to adjust light intensity in addition to exposure time. This can be used as part of a structured constant-irradiance control strategy when supported by the printer, electronics, firmware and export workflow.
The engineering objective is not simply to increase light power, but to help maintain a more constant effective UV power at the vat over the service life of the printer.
Why this matters
In LCD and DLP systems, the real curing power available to the resin may change over time due to optical ageing, reduced transmission, cumulative operating time or printer-to-printer variation. If the effective irradiance falls, the same stored print profile may progressively become under-cured, increasing the risk of unstable printing and avoidable failures.
- Measure the real transmitted UV power with a suitable radiometer.
- Compare the measured value against the target working irradiance.
- If the printer workflow allows it, adjust light intensity in a controlled way to compensate for power loss.
- Then revalidate exposure time, adhesion behaviour, green strength, detail and dimensional response.
Software note
Some slicer ecosystems expose light-intensity controls directly, while others depend more strongly on printer-specific firmware support and profile implementation. These controls should always be treated as advanced process variables, not as universal fields available on every machine.
Practical benefit
This approach may allow LCD and DLP printers to operate closer to a constant-power or constant-irradiance condition, reducing print failures caused by progressive loss of real curing power over time.
Recommended radiometers
Recommended for 405 nm workflows
Chitu Systems Digital UV Light Meter
A practical recommendation for standard 405 nm resin-printing workflows where the main goal is to monitor transmitted UV power and support structured recalibration.
Low-cost 2-in-1 alternative for 385 nm and 405 nm workflows
AH-NUV UV Light Meter
Suitable for both 385 nm and 405 nm measurements when used in the correct wavelength mode, making it a practical low-cost option for users working across both wavelength families.
Relationship to exposure time
Exposure time and light intensity are linked variables. If one changes, the effective curing energy changes. For this reason, intensity compensation should always be validated together with standard-layer exposure, bottom exposure and the selected target layer thickness.
Quick rule: if light power changes, exposure must be revalidated.
5) Recommended first setup workflow
Simple first profile for beginner users
- Select a practical layer height, usually 50 µm or 100 µm.
- Set 2–4 bottom layers at 75–100 s as the initial adhesion baseline.
- Choose a first normal exposure time using fast CRT logic.
- Use moderate and stable lift distance and lift speed.
- Keep secondary advanced fields unchanged during the first trial unless clearly necessary.
- If supported and intentionally used, adjust light intensity only in a controlled manner and revalidate exposure.
- Print 3Dtest1 first.
- Then validate with 3Dtest2.
6) Fast CRT logic for practical exposure selection
Use fast CRT before over-editing software profiles
The quickest structured way to choose a practical standard-layer exposure is to use a fast CRT.
- Measure cured thickness at 5 s, 10 s and 15 s.
- Evaluate cured thickness and green-state strength.
- Identify the likely working interval for the selected resin and printer.
- Add only 1–2 extra points in the interval that matters for the target layer thickness.
Quick rule: it is usually better to adjust one important exposure variable than to randomly change many settings at once.
7) Quick troubleshooting for early failures
What to change first when the print fails
Failure mode 1 — complete detachment from build platform
Increase bottom exposure time and/or bottom layer count.
Failure mode 2 — part too soft, weak or tender
The standard-layer exposure is too low. Increase normal exposure time.
Failure mode 3 — part too brittle or too strongly adhered to the release film
The standard-layer exposure may be too high. Reduce normal exposure time.
Failure mode 4 — acceptable printability but poor fine detail
Reduce over-curing by lowering exposure, and only after validation, review light-intensity settings and fine tuning if needed.
8) Validation with 3Dresyns calibration files
Validate the software profile before considering it usable
Once initial settings have been entered into the slicer, validate them using the 3Dresyns calibration files.
3Dtest1 helps evaluate general printability, XY detail and the selected standard exposure.
3Dtest2 helps evaluate supports, XYZ printability and Z-axis accuracy.
9) Relationship to official 3Dresyns® documentation
This guide is a practical companion, not the governing IFU
This page must be used together with the official 3Dresyns® documentation. In case of discrepancy, the official IFU always prevails.
Governing principle
Enter software settings as a qualified starting baseline, not as a universal recipe. Then validate the material–printer–process combination with fast CRT logic, calibration files and the correct post-processing workflow.
Need technical support?
For profile setup, CRT definition, structured optimisation or printer qualification, contact info@3dresyns.com.