Smokiness
Smokiness
Marbled pattern of light and dark swirls on the part surface.
How to Identify
Smokiness can be diagnosed as follows:
- Swirl patterns are most visible on large flat surfaces.
Troubleshooting
It is recommended that you review all the possible solutions before taking action to ensure you are pursuing the best course of action.
If the best course of action is not apparent, try the troubleshooting options in the order listed. Refer here for more tips.
Process, Material, and Accessory Checks
If any of these conditions apply to your print, take the corrective action and reprint to see if the problem is resolved.
Verify that the resin lot is not expired.
Follow the recommended dispensing and mixing protocol for your resin and dispensing method.
Follow instructions for the dispenser you are using, paying extra attention to these items.
Follow instructions for the mixing solution you are using: a vortex, overhead, or planetary mixer, and pay extra attention to these items.
Follow instructions for the MMD you are using and pay extra attention to the settings used.
If resin is susceptible to visible smokiness, additional stirring of the resin before the next print can help alleviate the issue.
Reference causes to address the root problem.
If problems persist, please reach out to Carbon Support.
Explanation & Causes
Explanation
When resin is not properly mixed, this can be visible in the finished part, similar to the swirling pattern seen in this photo of stirring two resin colors.
RPU may be more susceptible to mixing issues.
Causes
Resin
The printing material is expired, beyond the printing range in its pot-life, or has been improperly mixed, causing abnormalities in the print.
Root Issue | Problem | Why Defect Presents |
|---|---|---|
Resin is not mixed properly | Resin lot is expired | When resin has expired, the Part A and/or B of a two part resin may be thicker than normal and may not mix properly with normal protocol. |
| Mixed too quickly | Regardless of the mixing method used, if the process is completed too quickly, the resin will not have time to fully mix. |
| Mix ratio is wrong | If the Part A and B of a two part resin are not mixed at the proper ratio then normal protocol may not ensure a complete mix. |
Mechanical properties of the material are also likely to be off.