Part Defects

Flashing

11min

Flashing
Additional cured resin at the base of the part.
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How to Identify
Flashing can be diagnosed as follows at the base of the part, with the base being the surface that was on the platform during printing.
Extra cured resin appears along the part's base edges. 
Fringing﻿ is a defect that may appear similar at the part's base but will be jagged instead of smooth.
The base appears larger than the rest of the model.
Labels on the base of the part are difficult to read or unreadable.
Cause - Inconclusive
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Cause - Inconclusive
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Cause - Inconclusive
Cause - Inconclusive Unreadable Label
Cause - Inconclusive Unreadable Label
Troubleshooting
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Hardware Checks
If any of these conditions apply to your print, take the corrective action and reprint to see if the problem is resolved.
Verify platform and cassette are installed properly
M1/M2 Printers - Clean the platform's kinematic balls and clean & lubricate the kinematic pin mounts on the platform and cassette per monthly maintenance﻿.
DO NOT bake parts on the platform which will cause misalignment of the kinematic balls.﻿
Reference cleaning and installation instructions for your printer: M1/M2 Printer﻿, M3/M3 Max Printer﻿, L1 Printer﻿.
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Diagnostics
The following diagnostics may help determine if the issue is hardware related.
Print with a different platform and/or cassette
If the issue is resolved with another platform or cassette, reach out to Carbon Support for assistance with the problematic hardware.
Run an Alignment Squares Test﻿. 
Print Preparation or Part Design Adjustments
Choose among the suggested actions below and select the best approach for your application.
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
Flashing is additional cured resin at the base of the part. This is due to light scattering as a result of the optical effect overcure﻿.
Overcure can occur throughout the part (2), but flashing is a specific case at the base of the part due to the higher exposure times needed for adhesion to the platform (1).﻿
Base adhesion generally requires exposure times 5-20 times higher than the nominal exposure throughout the rest of the print to avoid adhesion failures. The extra exposure time, however, can cause significant overcure as photons scatter.
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Causes
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Root Issue
Problem
Why Defect Presents
Misalignment
Improper seating
The platform could be too close to the window, receiving a higher dose of UV light than intended.
Misalignment
Unlubricated kinematic pin mounts
M1/M2 Printers only
The platform could be too close to the window, receiving a higher dose of UV light than intended.
Misalignment
Mechanical alignment of the printer
The platform could be too close to the window, receiving a higher dose of UV light than intended.
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Printing Stage
Parameter Type
Type of Adjustment
Why Defect Presents
5 Exposure
Exposure Timing
﻿Increase﻿
More UV exposure at the base increases overcure that causes flashing
5 Exposure
Brightlining
﻿Increase﻿
More UV exposure at the base increases overcure that causes flashing
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Root Issue	Problem	Why Defect Presents
Misalignment	Improper seating	The platform could be too close to the window, receiving a higher dose of UV light than intended.
Misalignment	Unlubricated kinematic pin mounts M1/M2 Printers only	The platform could be too close to the window, receiving a higher dose of UV light than intended.
Misalignment	Mechanical alignment of the printer	The platform could be too close to the window, receiving a higher dose of UV light than intended.

Printing Stage	Parameter Type	Type of Adjustment	Why Defect Presents
5 Exposure	Exposure Timing	Increase	More UV exposure at the base increases overcure that causes flashing
5 Exposure	Brightlining	Increase	More UV exposure at the base increases overcure that causes flashing

Filled Holes on Skin

Fringing