Part Defects

Voids

16min

Voids

Small negative depressions on faces parallel to the platform.

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How to Identify

Voids can be diagnosed as follows:

  • Voids occur on surfaces parallel to the platform.
  • Voids are usually circular or oblong in shape.
  • Voids are most common on large cross sections.

Resin Starvation is a defect that can appear similar as it arises from similar circumstances.

Troubleshooting



Try the following actions in order.

  1. Process, Material, and Hardware Checks
  2. Print Preparation or Part Design Adjustments

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.

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.






If problems persist, please reach out to Carbon Support.

Explanation & Causes

Explanation

Normal printing requires resin flow to reach the center of the part. This is also known as reaching the deepest pixel. Voids occur when resin does not reach the center. This can happen for a couple of reasons:

  • Resin does not have time to completely cover each layer.
  • Resin is more viscous than the print planner expects.
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Causes

  • Print Preparation or Part Design
  • Resin
  • Print Plan Adjustments


Root Issue

Problem

Why Defect Presents

Large Cross Section



Resin must travel far to reach the deepest pixel and may not enough time to do so.

Unvented Volume



Unvented volumes can cause restricted resin flow.

Layout

Parts are too close together.

If parts are packed too close together, resin flow may be restricted and not reach all parts equally.

Print Profile

Print too fast in Dynamic

A shortened print gives less time for resin flow to all areas of the build. For M1 and M2 printers

Resin



Root Issue

Problem

Why Defect Presents

Expired

Resin may not be flowing properly.

If resin is too thick to flow as expected, the print plan may not allow enough time for the resin to reach the deepest pixel.

Print Plan Adjustments





Printing Stage

Parameter Type

Type of Adjustment

Why Defect Presents

1 Pump Up

Pump Height

Decrease

A decrease in the pump height can limit how much resin can flow.

2 Settle Up

Delay Timing

Decrease

A shortened settle up stage limits the amount of time resin can flow.