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Spot bent 8mm rod in Ultimaker 2

Spotted irregular movement of my back slider, in my newly build Ultimaker 2+ Extended and thought I’d share how to check your rods.

How to check if your rods are straight.

They look straight and feel straight, but when mounted it is easy to see they if they are not.

Simply place the slider in the middle of the rod you want to check. Move the carriage back and forth.
The slider should be still. No movement at all.
As you can see, this slider moves up and down as I move the carriage back and forth, so it needs to be discarded.

If you can’t see how the slider moves up and down, then try focusing on the belts connecting to the slider.

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