Does Bambu Lab plan to improve the vibration compensation function (similar to Klipper’s “input shaping”) for the Bambu Lab A1 printer in future firmware updates? Currently, residual vibrations are noticeable on models regardless of the acceleration settings. Perhaps the vibration detection algorithm could be reworked or refined? This issue remains pronounced even at an acceleration of 2000 mm/s².
Vibration compensation is not the same thing as pressure advance.
Pressure advance modulates the nozzle pressure to maintain consistent flow even when speeding up, slowing down, or changing directions.
Vibration compensation, on the other hand, measures the natural frequency of the printer and uses active frequency compensation to reduce ghosting and ringing.
That said, there can be many reasons why vibration compensation isn’t doing a perfect job - belt stretch/wear, bearing issues, changes to the machine or where it’s located, and many other factors can all play a role here.
Have you run the vibration compensation setup recently, or are you only relying on the quick check it does before each print?
Also, it sounds like you’re modifying speed and acceleration settings - I’m not sure you can expect the factory compensation algorithm to perform well when you’re changing machine parameters.
The A2L is supposed to have improved vibration compensation. I think it measures it at different gantry heights instead of just in 1 place. Can’t comment on if it works; I don’t use the A2L,
I don’t understand what pressure advance has to do with vibrarion compensation. They are separate things.
Most impactful is the AMS top mount
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I dont get the pressure advance comparison either. Maybe they are referring to input shaping.
I have no desire to mess with the compensation algorithm, but it would be interesting to see the resonance graphs.
I apologize; I made a typo and have corrected the text. I was referring, of course, to input shaping. Bambu Lab has issues with this across the entire A1 and A2L series—on both brand-new and older units. Tightening the belts doesn’t fix the problem, as the vibration-reduction algorithm used in the firmware could, in my opinion, perform better.
I’ve seen actual finished models produced on an A2L machine, and they also exhibit residual vibrations or ringing artifacts following corners or holes. Reducing acceleration helps, but it is not enough on its own.
Are you saying that the A1 is alone on the table and you see ringing/vibration artifacts? Or that you have many on the table and they are impacting each other?
An example pic of your issue might help.