How to fix ghosting (ringing) on Bambu Lab prints
Ghosting (ringing) is the ripple that repeats after a sharp corner, caused by the printer shaking when it changes direction fast. Lower only the outer wall acceleration in Bambu Studio (Process → Speed → Acceleration): 4000 mm/s² on P1/X1/H2 printers, 3000 mm/s² on the A1 series, or 3000 and 2000 for the cleanest walls. Inner walls and infill keep their speed.
Why it happens
At a sharp corner the print head stops and turns. With very high acceleration the frame and belts keep vibrating for a moment, and the nozzle draws that vibration into the outer wall as faint repeating lines.
Bed-slingers (the A1 and A1 mini) move the whole bed on the Y axis, so they ring more in that direction and need a lower value than CoreXY printers.
The settings in Bambu Studio
- Acceleration → Outer wall
outer_wall_accelerationProcess → Speed → AccelerationP1P, P1S, P2S, X1, X1 Carbon, X1E, X2D, H2 series: 4000 (Balanced) / 3000 (Quality) mm/s². A1, A1 mini, A2L: 3000 / 2000 mm/s². - Outer wall (speed)
outer_wall_speedProcess → Speed120 mm/s on Quality and 150 on Balanced for PLA; 90 for silk PLA; 100 for PETG.
Names are from Bambu Studio 2.x. The settings search box finds either the name or the key.
Good to know
- Only the outer wall changes, so print time barely moves: inner walls and infill, where most of the time goes, keep their speed.
- Keep Bambu's vibration compensation calibration on when you start a print. It reduces ringing too, and these settings work on top of it.
- Speed goal: Plateright leaves acceleration alone and only fixes likely failures.
What Plateright checks
The report knows which of the 14 Bambu Lab models you print on (from the file or your saved printer) and uses the CoreXY or bed-slinger value to match, with a plain reason next to it.
Questions
Is ghosting the same as ringing?
Yes. Ghosting, ringing and echoing all name the same ripple that repeats after a sharp corner or an embossed detail.
Why is ghosting worse on my A1 than on a P1S?
The A1 moves the whole bed front to back, and a heavy moving bed vibrates more when it changes direction. That is why its outer-wall acceleration should be about 1000 mm/s² lower.
Will lowering acceleration make my print much slower?
Not if you lower it only for the outer wall. The outer wall is a small share of the total time; the change usually adds a few minutes.
Related fixes
Updated September 28, 2026.