Bed tramming knobs and screws

Bambu Lab X1 Series Troubleshooting
1

Hi,

I was checking the G-code provided on the wiki or manual bed tramming using a 0.4 mm feeler gauge (printed). There is some diference between screws, so I probably need to tram the bed a little. Before touching anything, I’d like a question about abot the knobs and bed screws. The Wiki asks you to turn the screws to an exact position before turning the knobs. Do the screws’ purpose is to prevent the knobs from turning easily, so that you don’t mess with tramming accidentally? Can you turn the knobs without messing with the screws?

Thanks…

2

That position they mention in the wiki is obsolete - I couldn’t follow the wiki if I wanted to. Also, I do not want to - I prefer the non destructive method.

Turning the knobs will turn the screws (or nuts, but same difference). I believe there are some loctite there from factory so they are harder to adjust the first time. They’re also spring loaded so the loctite should be more or less redundant.

3

So, basically you don’t have to remove any screws, just turn the knob, but there will be some resistence the first time due to loctite. The question is if it is worth making the adjustment. In my case, I can feel the feeler gauge sliding with some resistence under 2 positions, but in the last one it can move without any resistence, which means it is higher than it should be. Would that difference be compensated by auto bed levelling, or is it worth making it as level as possible. My fear is, aftere making the adjustement, the knob may become less firm and lose its calibration with a slight ccidental touch. But your answer mentions springs, so it should be able to hold it without any loctite.

4

Just reach under the heat bed and turn the knob(s). You’re not going to break anything.

The spring keeps the nut under compression, so there’s a lot of friction. The knobs aren’t going to move much over time and they’re definitely not going to move as a result of accidentally touching them.

1 Like
5

There is also an assortment of “tools” to help make adjustments easier.

3 Likes
6

Time for feedback: I used the Knob Tool by ArticulatedPotato and it was very easy to turn the knobs. I was expecting for higher resistence. The procedure is fairly easy, so thanks or the guidance and encouragement :smiley:

And the non-destructive way is very practical and repeatable!

1 Like