First Layer Issues​

What Is It?​

First layer issues reduce the chances of a successful print and are often the cause behind several failed 3D prints. Some of the significant and most common first layer problems are - prints not sticking to the bed surface, the first layer too rough, the nozzle not extruding filament or holes and lines in the bottom of your prints.

These problems can either affect the quality of your prints or cause them to fail, leading to loss of filament and printing times. Therefore, it's crucial to eliminate these issues and ensure a smooth and even initial layer.

Gaps in Print surfaces​

What Is It?​

Often 3D prints can have small visible gaps on their top surfaces, outer walls, and between the infill structure and the inner walls. These cavities ruin the appearance of your 3D-printed model and might also affect its structural integrity. Often, the cause behind gaps in your 3D prints is related to slicer settings, and you can quickly resolve these gaps by fine-tuning specific settings.

Inferior Surface Quality above Supports​

What Is It?​

Supports are essential to provide a base for the overhangs in your 3D prints. But incorrect support settings can affect your print's quality and appearance. If the top of your support is too close to the print's surface, it might leave marks and blobs. Whereas, if there's too much gap between the support and the print, you will encounter filament drooling and poor overhangs.

In an ideal scenario, the support should easily detach from the print's surface without leaving any marks. Moreover, the supported area of the print shouldn't indicate any filament drooling or signs of a support structure underneath it.

Inferior Surface Quality underneath Supports​

What Is It?​

With extreme overhangs, you need to use support structures that use the print's surface as their base. In such cases, the support pillars can adhere firmly to your print, affecting your part's surface quality. Less distance between the support base and the print can make removing the supports a challenge.

Popular slicers such as Cura and PrusaSlicer circumvent this issue using Tree Supportstructures. Tree supports have minimal contact with your 3D prints and help you achieve better-looking parts even with large overhangs.

Inaccurate Dimensions​

What Is It?​

Incorrect printer calibration can lead to dimensional inaccuracies in your final 3D printed parts. An inaccurate part will not fit well with other elements and lead to issues during the final assembly of your printed design. It's not an issue with 3D-printed showpieces or aesthetic parts but will cause significant problems with complex assemblies or functional designs.

For simplicity, we'll broadly classify these inaccuracies as positive and negative dimensional errors. If your print has a positive error, it indicates the observed measurement is more than the designed value. If your print's observed measurement is less than the design value, it indicates a negative print error.

Layer Shifting​

What Is It?​

Layer shifting is one of the most undesirable problems in 3D printing, and there's no way to recover your prints from this issue. A layer shift is unpredictable, not easy to diagnose, and leads to a print failure. Layer shifts are more likely to occur during long printing jobs due to the continuous strain on the printer's mechanical and electrical components.

The best way to prevent layer shifting is to perform periodic maintenance of your printer and ensure that each component performs optimally.

Alternatively, if your prints fail due to the layer shifts, you can use Obico to quickly catch the failed prints and stop it. The Obico software offers you complete remote control of your 3D printer, and helps you save on filament and printing time.

Poor Quality Bridges​

What Is It?​

Long bridge segments in your 3D prints can sag a little due to the lack of supports or high printing temperature. In these cases, the filament lines drool down and spoil the appearance of your 3D prints. Excessive sagging ruins the bridge's structural integrity and might even cause interference issues with mating components.

Prints Difficult to Remove From Bed​

What Is It?​

A low layer height, improper bed level, or extra bed adhesion can cause the prints to stick firmly to the print bed. Certain materials like PETG stick too well with glass beds and hairspray. In many cases, the prints either broke halfway or had a piece of bed surface stuck to their bottom layers.

To avoid this issue, you must calibrate your first layer height and use the appropriate printing surface per your material. The key is to strike a perfect balance such that your prints stick well enough not to get knocked off quickly but not too firm that it becomes difficult to remove.

Stringing Issues​

What Is It?​

Stringing is denoted as the oozing of filament from the nozzle when the print head travels between two points on your 3D model. It's caused due to excess filament oozing out of the nozzle due to improper retraction settings or high filament temperature.

Stringing issues result in extra efforts during the post-processing to clean your prints and might still leave small blobs or dots on the print's surface. Although it might not affect the print's structural integrity in severe cases, it impacts the print quality and is an undesirable attribute for printing aesthetic or showpiece items.

Under extrusion​

What Is It?​

Under extrusion is caused when there's an interruption in your filament flow. Gaps in your layers, irregular layer lines, or webbed layers in your 3D model indicate an inadequate filament flow to the nozzle. It's one of the most common printing issues and is prevalent with Bowden drive extruders due to the long path of the filament.