Banding / ringing

Hi All,
Quite new to the A1 mini, used to have a 3d printer many years ago, but this is a very different beast (in a good way).

I’ve printed a number of things and noticed on some (especially on non bambu filament) that I have banding (my word for it) and some ringing (see the image).

The only mods I have done to the A1 mini are:
A handle to the top that moves the spool holder around the back
A poop deflector (small one)
Some tpu feet to reduce noise onto my desk
(Mentioning incase any of these could be the cause).

About a week ago I got an error that the Y belt needed tensioning (I’ve only had this for 2 weeks), which I followed the guide online… To be honest it was nearly impossible to move the Y tensioner, so not sure if that is a sign… but the error went away after I did what I could.



Any help or guidance would be greatly appreciated

Incase others have the issue…
Not that I have fully fixed it, but the belt tensioner for the Y axis is the top one… you undo the bottom screw, and its really not clear, but the only bit that can move is the top bit… I have moved that and printing a calibration cube currently.

What a difference properly tightening the Y belt made… went from loads of rining to almost none - looking at a rining stress test its not perfect… but better than it was. I think the machine will always have some rining… but the difference is night & day

Pictures would be nice, so people can see the difference it made and also use it for reference if they experience the same thing.

Sorry… yes that makes more sense.

As an fyi I also tightened all the screws on the hot end (including the 4 behind the hotend - take out the 0.4mm nozzle, undo the 3 screws and there are 4 hidden behind it).

Images of my calibration cube + ringing test.



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There’s still a bit of ringing there, but looks a lot better than it did. Did you run the calibration again after you tightened the belts?

I did. and I’m stumped as to how to fix it any more… but it’s a huge improvement.

Any suggestions?
Could tpu (95A hardness) feet be causing issues?

Thanks

I can’t see why they would. If you’ve run the calibration with them on, then that should be accounted for anyway.

I’m sure they look better in person, as that’s an extreme angle and a colour that probably shows a lot of defects. It certainly has much more consistent layer lines, so it’s a big improvement.

Hopefully someone with an A1 will be along soon to say how they compare to theirs. It’s certainly better than my X1C but that has a faulty accelerometer apparently. I’m hanging out in the A1 camp as I’m considering jumping ship.

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