3D Printing Failures: How to Diagnose and Repair All 3D Printing Issues by Sean Aranda

Author:Sean Aranda [Aranda, Sean]
Language: eng
Format: epub
Published: 2017-06-09T03:00:00+00:00

Over/Under Extrusion

Over and under extrusion is normally caused when your stepper motor is not turning the proper amount of steps, and results in either too much or too little plastic being extruded. This will lead to either ugly or brittle parts.

**For most of your issues, you will want to skip down to the Check and Fix your E-Steps section of this chapter.

Over Extrusion

Over extruded parts will be fairly easy to tell either to the naked eye, or because parts are not fitting together. If you factored in your machine tolerances (which I go over in the Parts Not Mating Together chapter) and parts are still not mating together, you likely are experiencing a bit of over extrusion.

Check to see if nozzle is degraded

Nozzles can become degraded over time from material constantly running through them, as well as from times you started a print too close to the build plate. Some materials such as the Carbon Fiber Reinforced blends by 3DXTech require a hardened steel nozzle to prevent rapid degradation.

When your nozzle degrades, the diameter will get slightly larger than it was when factory shipped to you. This can lead to some parts of your print looking as though there was over extrusion. You won’t really be able to tell if you have this issue, unless your nozzle looks like the one below:

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