Exposure Time Scale
| Resolution (XY) | Width (mm) | Length (mm) | Area (mm squared) | Scaling Factor | Base Line Exposure Time Recommended (seconds) |
|---|---|---|---|---|---|
| 26 microns | 28 | 49.8 | 1,393.7 | 0.5 | 1 |
| 37 microns | 40 | 71.1 | 2,844.4 | 1 | 2 |
| 50 microns | 54 | 96 | 5,184 | 1.8 | 3.6 |
| 75 microns | 81 | 144 | 11,664 | 4.1 | 8.2 |
| 100 microns | 108 | 192 | 20,736 | 7.3 | 14.6 |
| Note: The base line exposure times are for MakerJuice resins and 3D Materials ABS resin. Spot-HT is 2 times the base line exposure time, while 3DM Cast is 1.5 times the base line exposure times. If you notice light leakage , please decrease the exposure time. | |||||
These are the recommended base line exposure times. In general, the actual exposure time needed should be lower than these numbers. Each print requires a customized set of printing parameters. We normally define parameters for 5 printing zones in the “basic mode” of our software.
- First zone:
This is for the first attachment layer. The first attachment layer for 30 to 50 microns XY resolution is always 60 seconds while attachment layers for greater than 50 microns XY resolution require 10 times the base line exposure time. The lifting height is set to 7 mm with lifting speed of 25 mm/min. - Second zone:
This is for the rest of the attachment layers. The total thickness of attachment layers should be between 0.2 mm to 0.3 mm. The exposure time is half of that of the first layer. The number of layers in this zone depends on the thickness of your layers. The lifting height is set to 6 mm with lifting speed of 25 mm/min. - Third zone:
This is for the rest of the layers of the first 1.2 mm of the print. Exposure time is the same as that for the fourth and fifth zones, depending on the structure printed. The lifting height is set to 5 mm with lifting speed of 25mm/min. - Fourth zone:
This is for the supports. If the model has fine supports, increase the exposure time two or more times than the regular exposure time in the fifth zone. The lifting height is set to 4mm with lifting speed of 50mm/min. - Fifth zone:
This is for the rest of the layers. The exposure time is estimated from the base line exposure time. The lifting height is set to 3 mm with lifting speed of 50mm/min.
Skip the fourth zone if the print contains no supports. If the 5 zones are not enough for the print, use the “advanced mode” of our software and set all the parameters in an Excel spreadsheet.
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