Part Defects

Delamination

13min

Delamination
The part has disconnected slices with horizontal, eye-shaped holes.
 
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How to Identify
Delamination can be diagnosed as follows:
Holes are horizontal on the platform side of the hole and curved away from the platform.
Flat surfaces, parallel to the build platform, print with a rippled surface.
This is a rare failure and should be one of the last options considered when troubleshooting projects in production.
Cause - Inconclusive
 
Cause - Inconclusive
 
Cause - Inconclusive
 
Troubleshooting
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Process, Material, and Hardware Checks
If any of these conditions apply to your print, take the corrective action and reprint to see if the problem is resolved.
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Check the expiration date of your resin lot.
Ensure all two-part resin prints are completed within the resin's pot life.
Ensure that one-part resins are emulsified. Invert the bottle 5-6 times to distribute pigment.
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Print Preparation or Part Design Adjustments
The following solutions will address print or part-related causes of the defects. Choose among the suggested actions below and select the best approach for your application. Usually, only one type of adjustment is needed.
Reference Print Plan Adjustments﻿ for guidance on the following parameters:


5 Exposure Parameters﻿ 
Exposure Timing Parameters
Base Exposure Multiplier
Brightlining Parameters
All four parameters must be specified
Brightline Interior Exposure Time
Brightline Exterior Exposure Time
Brightline Border Thickness Pixels
Brightline Outer Borders

If problems persist, please reach out to Carbon Support.
Explanation & Causes
Explanation
Delamination occurs when the current slice does not fully cure onto the previous slice resulting in one or more eye-shaped holes as the print proceeds.
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Normal Exposure
The monomers, closest to the dead zone, do not connect to other monomers because the oxygen-rich dead zone is preventing the curing process. These stray monomers remain ready to cure to the next slice, ensuring isotropy.
Most monomers connect within the slice to solidify.
Farthest from the oxygen-rich dead zone, monomers connect to stray monomers from the previous slice. This connection between slices is why DLS printing yields isotropic parts.
Delamination
Same as normal exposure.
Same as normal exposure.
Farthest from the window, there is not enough UV exposure to connect the monomers between slices, so the slices are not fully connected.
Causes
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Root Issue
Problem
Why Defect Presents
Slicing Error
Blank or missing portion of slice image
A blank slice or a missing section of a slice can prevent the following slice from connecting properly.
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Root Issue
Problem
Why Defect Presents
Expired
Past pot-life
Mixing
 
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 Resin is under-exposed
If the resin is questionable due to any of the root issues, then the standard exposure time for the resin may not properly expose the slices to UV light. When the resin is under-exposed, slices may not connect properly. 
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Printing Stage
Parameter Type
Type of Adjustment
Why Defect Presents
5 Exposure
Exposure Timing
﻿Decrease﻿
When under-exposed, slices may not connect properly.
5 Exposure
Brightlining
﻿Decrease﻿
When under-exposed, slices may not connect properly.
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Root Issue	Problem	Why Defect Presents
Slicing Error	Blank or missing portion of slice image	A blank slice or a missing section of a slice can prevent the following slice from connecting properly.

Root Issue	Problem	Why Defect Presents
Expired Past pot-life Mixing	Resin is under-exposed	If the resin is questionable due to any of the root issues, then the standard exposure time for the resin may not properly expose the slices to UV light. When the resin is under-exposed, slices may not connect properly.

Printing Stage	Parameter Type	Type of Adjustment	Why Defect Presents
5 Exposure	Exposure Timing	Decrease	When under-exposed, slices may not connect properly.
5 Exposure	Brightlining	Decrease	When under-exposed, slices may not connect properly.

Cure-Through

Detached from Supports