The Problem—Print Looks Droopy and Stringy

Simply put, this common 3D-printing problem simply means that the printer uses more material than it requires; thus, it creates more material than is required. Printed versions are likely to have excess materials on them (Figure 8.6).


FIGURE 8.6 Over-extrusion.

Incomplete and messy infill

FIGURE 8.7 Incomplete and messy infill.

The Cause

Essentially, the setting of the Flow or Extrusion multiplier in your slicing program is higher than usual.

The Solution

To troubleshoot this 3D-printing problem, go to your sheer program and test the settings of your Extrusion multiplier. Ensure that you have selected the correct value. If everything seems to be all right, then go to the Flow settings and decrease it.

Incomplete and Messy Infill

The Problem

Your print’s internal structure is either broken or missing (Figure 8.7).

The Cause

To be frank, there are a number of reasons why the internal structure of your model can be broken or missing. While the most common one is that your slicing program has incorrect settings, a slightly blocked nozzle may also cause this problem.

The Solution

Take a look at the fill density—open your slicing software and take a look at the fill density. The best value is 20%; if the value is less than that, you’re bound to encounter problems. However, if you’re running large prints, you might want to raise this value to ensure that the model you’re about to print is supported enough.


The Problem—Bending

The printed model bends upward at the base until it no longer aligns with the printing platform. This results in the print being unplugged on the printing bed and the horizontal cracks developing in the upper parts of the printed models (Figure 8.8).

The Cause

Warping or cracking occurs because it is a natural characteristic of plastics. When your PLA or ABS filament begins to cool down, it gradually begins to contract. If the plastic cooling process happens too quickly, it results in warping or bending.

The Solution

There are different ways to troubleshoot this 3D printing issue.

1. Use a heated platform—it is the simplest solution; all you need to do is set the heated platform to a glass transition temperature (a temperature just below the melting point of the plastic). You can do this by using the sheer program

and you can easily change the required filament temperature to the spool or wrapping of your filament. If you set the appropriate temperature, the first layer will remain flat on the surface.

2. If the calibration of the print platform is not right, you are bound to encounter this issue. So what kind of 3D-printing troubleshooting tip is going to work here? Well, all you have to do is level the print by checking the calibration again, make sure the bed is aligned, and the nozzle height is perfect.

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