Acceleration Settings

Understanding Acceleration

Acceleration controls how quickly your printer changes speed. Higher acceleration allows the printer to reach target speeds faster, but can cause quality issues like ringing and ghosting. Lower acceleration produces smoother prints but takes longer.

Default Acceleration

Parameter: default_acceleration
Unit: mm/s²
Description: Base acceleration value used when no specific value is set. Set to 0 to use firmware defaults.

Outer Wall Acceleration

Parameter: outer_wall_acceleration
Unit: mm/s²
Description: Acceleration for outer perimeters. Keep lower to reduce ringing on visible surfaces.

Inner Wall Acceleration

Parameter: inner_wall_acceleration
Unit: mm/s²
Description: Acceleration for inner perimeters. Can be higher since they're not visible.

Infill Acceleration

Parameter: infill_acceleration
Unit: mm/s²
Description: Acceleration for infill moves. Can be very high for faster prints.

Travel Acceleration

Parameter: travel_acceleration
Unit: mm/s²
Description: Acceleration during travel moves. Can be highest since no printing occurs.

First Layer Acceleration

Parameter: first_layer_acceleration
Unit: mm/s²
Description: Acceleration for the first layer. Lower values reduce chance of bed adhesion issues.

Acceleration by Printer Type

Printer Type	Outer Wall	Inner Wall	Infill	Travel
Bedslinger	500-1000	1000-1500	1500-2000	2000-3000
CoreXY	2000-5000	3000-8000	5000-10000	10000-15000
Bambu Lab	5000-10000	8000-15000	15000-20000	20000
Delta	2000-3000	3000-5000	5000-8000	8000-10000

Acceleration vs Quality

Lower acceleration: Better surface quality, less ringing, longer print time
Higher acceleration: Faster prints, potential for ringing/ghosting artifacts
Input shaping: Enables much higher acceleration without quality loss

Input Shaping

Input shaping (available in Klipper and some Marlin forks) uses algorithms to compensate for printer vibrations, allowing much higher accelerations without ringing.

Shaper Type	Best For
ZV	Minimal smoothing, fastest
MZV	Good balance
EI	Better vibration suppression
2HUMP_EI	Maximum vibration suppression

Troubleshooting

Problem	Cause	Solution
Ringing/Ghosting	Acceleration too high	Reduce outer wall acceleration
Layer shifts	Acceleration exceeds motor torque	Reduce acceleration, check current
Slow prints	Acceleration too low	Increase while monitoring quality
Uneven corners	Jerk too high/low	Adjust jerk settings

Calibration Tip: Use OrcaSlicer's Ringing Tower calibration to find optimal acceleration values for your printer. Enable input shaping in your firmware if available for best results.