Ramming length on extruder change
How many millimeters of filament the nozzle pushes before switching extruder, to ooze less.
How it works
Before switching extruder (printers with two nozzles, like the H2D) or hotend (printers that swap it on their own, like the H2C), the nozzle does a “ramming”: it pushes out a stretch of filament so it doesn't ooze while it waits. On printers with a single extruder and a single hotend, like the A1, these settings do nothing.
When to change it
- With a single extruder (like the A1): don't touch it; it has no effect.
Typical values
| Value | What for |
|---|---|
| 5 mm | PLA Basicdefault |
Watch out for
- If your printer does switch extruder or hotend and you see strings or leftovers of the previous filament right after the switch, this is the group of settings to look at.
Goes well with
What Bambu Studio saysits help card, quoted
What Bambu Studio says
When changing the extruder, it is recommended to extrude a certain length of filament from the original extruder. This helps minimize nozzle oozing.
Bambu Studio tooltip for this setting · AGPL-3.0
Read more at the official source
In your profileBambu PLA Basic @BBL A1 · 5 mm
In Bambu Studio, the profile Bambu PLA Basic @BBL A1 sets it to5 mm
In other slicers
- Orca Slicer
- Filament ramming lengthFilament › Basic information
- PrusaSlicer
- No clear equivalent.
- Cura
- No clear equivalent.
Names taken from each program's code (Orca Slicer 2.4.2, PrusaSlicer 2.9.6, Cura 5.13.0). Credits