Contradictory information, what's correct?

[frederiekpascal 193]

I've been reading a lot the past few months about 3D printing. And while reading I found some contradictory information.

1)Tension in the filament feeder, position of white clip.

a) Ultimaker official support:

https://ultimaker.com/en/support/view/151-the-feeder

TENSION

In order to guide the filament properly through the feeder into the bowden tube and print head, it's important that the tension on the feeder is set correctly. If the tension is too high, it means that the knurled wheel of the feeder will dig into the filament, through which it flattens or - even worse - completely gets stuck. This is what we call grinding.

To prevent grinding of the filament it is therefore important to set the tension on the feeder as loose as possible, meaning that the white insert clip should be completely at the top. You can achieve this by inserting one of the hex keys in the hole on top of the feeder and turning it clockwise.

vs

b) 3Dverkstan

http://support.3dverkstan.se/article/23-a-visual-ultimaker-troubleshooting-guide#grinding

Feeder pressure

The amount of pressure that the feeder puts on your filament is adjustable via a small hidden screw accessed at the top of the feeder. To the right of where the bowden tube enters the feeder there is a small hole into which you can insert a hex driver to adjust the tension. The current setting can be seen on the little white dial right below this hole. When the dial is in the upper position the pressure is low and vice versa.

In mid-March of 2014 the spring inside the feeder was changed and the proper setting will therefore differ depending on when you received your printer. For machines from before mid-March of 2014 the indicator should be at the top and for machines after this date the indicator should be in the middle.

So what is in now? Should the white clip be in the middle or on top? If it's correct about the UM2 released after march 2014 that the clip should be in the middle. Why didn't Ultimaker update their page? It's confusing for me as beginner...

[valcrow 144]

I think generally, you can tell by looking at it before you mess around with it if it's at the middle or top. The machines come pre-tuned so you probably don't have to mess with it unless you start having issues that point directly to tension.

You can tell if the tension is too high or low by looking at the pattern that is imprinted onto the filament itself after traveling through the knurled bolt. The filament should have little pyramids pressed into it, usually about 3 pyramids wide with equal space between the pyramid imprints. and the filament should be round.

While the documentation may make it seem like an important thing to look at, practically speaking it's almost never the cause of printing issues because it's set by the factory, and it doesn't really change much over time.