Over-Adhesion
Over-Adhesion
The part is difficult to remove from the platform.
How to Identify
Over-adhesion is really an experience while removing the part from the platform, rather than a defect itself. Other defects may arise as a result of the difficulty in platform removal, as shown in the examples below, or you may simply be adding time to production as the labor to remove these parts becomes a burden.
Over-adhesion can be experienced as follows:
- Parts are very difficult to remove from the platform.
- Parts exhibit Flashing where they attach to the platform.
Flashing example with parts on the platform
Chipping example during platform removal
Troubleshooting
Do you see a defect?
If you see Flashing, Chipping , or Gouging, refer to that defect's troubleshooting for specific guidelines.
Is the part difficult to remove without a defect?
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 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.
Diagnostics
If the above checks & actions did not resolve the issue or do not apply to your print, the following diagnostics may further inform what is causing the issue.
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.
Change the orientation to place a smaller cross section on the platform.
Support the part off the platform.
- Supports will provide a smaller cross section on the platform
- The scraper tool used to remove the part from the platform will not touch the part, protecting it from damage.
If problems persist, please reach out to Carbon Support.
Explanation & Causes
Explanation
The first slices of the build are exposed to a higher level of UV light to promote adhesion. This can result in parts that are very strongly adhered to the platform.
- Geometries with larger cross-sections at the platform are the most susceptible to over-adhesion.
- EPX may be more prone to over-adhesion due to its rigidity.
Causes
Print Preparation or Part Design
How the part is oriented, supported, or designed is causing the defect.
Root Issue | Problem | Why Defect Presents |
|---|---|---|
Oriented | Large cross section on the platform | More surface area to adhere the part to the platform at the higher base exposure levels. |
Hardware
The printer, cassette, or platform is dirty or requires maintenance to resolve the defect.
Occasionally, a defect may indicate the printer requires servicing by a Carbon engineer.
Root Issue | Problem | Why Defect Presents |
|---|---|---|
Cleaning | Factory coating on platform | The factory coating on a new platform can lead to stronger adhesion. |
Misalignment | Mechanical alignment of the printer | The platform could be too close to the window, receiving a higher dose of UV light than intended. |
Print Plan Adjustments
Print Plan Adjustments adjust the print plan to optimize mid to high volume production and/or address part defects.
In doing so, adjustment may both prevent or cause defects. Below are adjustments that can cause this defect.
Printing Stage | Parameter Type | Type of Adjustment | Why Defect Presents |
|---|---|---|---|
5 Exposure | Exposure Timing | Increase | Adhesion is increased with more UV exposure |
5 Exposure | Brightlining | Increase | Adhesion is increased with more UV exposure |