Short answer
Bambu P1S PLA settings start with the printer’s own generic PLA profile, which already lands close: a 210 C nozzle, a 55 C bed, a flow ratio near 0.95, and the fast print speeds the P1S is built for. PLA is the easiest material on this machine, so most of your tuning is flow and first-layer height, not temperatures.
Starting PLA settings for the P1S
These numbers follow the Bambu Lab PLA guide and the generic PLA filament profile in Bambu Studio. The P1S prints PLA fast and with strong cooling by default, which suits the material.
| Setting | Recommended | Why |
|---|---|---|
| Nozzle temp | 210 C | The Bambu generic PLA profile default. Move 5 C either way for a fussy spool. |
| Bed temp | 55 C | Bambu sets 55 C for PLA; the textured PEI sheet holds it without glue. |
| Flow ratio | 0.95 to 0.98 | PLA wants a slight flow cut. Run a flow calibration if surfaces look over-extruded. |
| Part cooling | 90 to 100% | PLA likes full cooling; the P1S aux fan helps overhangs. |
| Print speed | Fast (profile default) | The P1S is built for speed. Drop outer walls to 50 percent for cleaner detail. |
| First layer | 55 C bed, 30 mm/s | Slow and clean for the textured sheet to grab the filament. |
How to adjust PLA settings on the P1S
Pick the generic PLA profile
In Bambu Studio, choose the Bambu PLA or Generic PLA filament profile. It loads the nozzle, bed, flow ratio, and cooling above automatically.
Dry the spool if needed
PLA tolerates moisture better than PETG, but a damp spool strings and pops. Dry at 40 to 45 C for a few hours if the surface looks rough.
Run flow calibration
Use the built-in flow calibration on the touchscreen or in Bambu Studio. It sets the flow ratio for your exact spool so walls come out clean.
Tune the first layer
Watch the textured PEI sheet for the first layer. If lines gap, raise flow a touch; if they smush, lower it.
Adjust speed for detail
For fine models, cap outer-wall speed at 50 percent. The P1S stays fast on infill while keeping the outside crisp.
Most P1S PLA trouble is wet filament or first-layer height, not temperature. The PLA hub covers the material, the PLA print settings page goes deeper on profiles, and the X1C PLA settings cover the sibling machine.
Related guides
Related
Sources & methodology
3 citations · reviewed 2026-07-09- 01Bambu Lab PLA Usage Guide (wiki)accessed 2026-06-29Tier 1
- 02Bambu Studio (Bambu Lab Wiki)accessed 2026-06-29Tier 1
- 03Prusament PLA Technical Datasheet (TDS PDF)accessed 2026-06-29Tier 1