Devovision graphs show wrong values

It might be possible that devovision presents wrong values during the extrusion process. In this article is explained what causes this issues and how you can fix them.

1. Wrong measurements due to dirty glasses

When the glasses of the sensor are dirty, it could cause the filament sensor to read the wrong values. The reason for this is that a contamination on the glasses can block light, resulting in a signal of filament present, thereby interfering with the actual measurements. It is essential to keep the sensor glasses clean and check them regularly.
The following article explains how the glasses can be removed so they can be cleaned.

To  clean the glasses of the sensor you can use some alcohol or acetone, but make sure not to put pressure on the glasses as they are fragile.

2. 0 measurement

The filament maker uses an sensor to measure the filament thickness. However, a few factors could interfere with the measurements, causing it to result in a ‘0’. The result of the ‘0’ measurements is that the filament maker does not know how thick the filament is, and therefore it does not make any changes.

Waving filament

Sometimes the filament moves a lot between the nozzle and the sensor, as described in the following article.

Due to the moving of the filament, it reaches out of the range and is therefore not measured. Not being measured can cause the ‘0’ measurement.

By preventing the waving filament, you’ll also prevent the ‘0’ measurements. However, sometimes a wavy filament is not very noticeable. When this is the case, you can keep the filament from moving in the sensor by pushing the filament into a corner using a screwdriver, or you can use this 3D printed part, filament clamp.”

Light interference

Because the filament maker uses an sensor, it could cause issues (such as wrong readings) when the sun or a bright lamp shines directly onto the sensor. If the filament maker is placed directly under a light source, you could use the following 3D print filament clamp to ensure that the sensor has some protection from the direct light source.

3. Filament maker firmware

In a previous version of the filament makers firmware there was a bug that could send out data to devovision with the wrong values. Therefore, it is important to check if the firmware of the filament maker is up to date.

When the Filament Maker runs on a older version of the firmware you can update it. This process is explained in the following article.