Bambu Lab Filament Settings: The Complete Parameter Guide

Bambu Studio ships with built-in profiles for common filaments, and for most users, those profiles work out of the box. But when you’re pushing speed limits, dialing in a specific brand, or troubleshooting quality issues, understanding what each parameter does matters.

These settings are based on my testing on the X1 Carbon and P1S. A1 Mini users should note that the lack of enclosure affects ASA/ABS settings significantly.

PLA Settings

Bambu Lab’s generic PLA profile is a good starting point. Here are the parameters I tune from defaults:

Temperature

• Nozzle: 220°C is safe for most PLA. For brand-specific behavior, drop to 210°C if you see excessive stringing; increase to 225°C if layer adhesion is poor.
• Bed: 55°C on smooth PEI, 35°C on textured PEI. The textured plate has more mechanical grip so you need less thermal adhesion.

Speed

At 200mm/s with vibration compensation enabled, most PLA prints well on both the P1S and X1C. If you see ringing at corners, drop to 150mm/s on outer walls (inner walls and infill can stay fast).

Key speed parameters:

• Outer wall: 150-200mm/s
• Inner wall: 200-300mm/s
• Infill: 250-350mm/s
• First layer: 50mm/s (don’t speed this up)

Cooling

PLA needs aggressive cooling for small features and overhangs. Set part cooling fan to 100% by layer 3. On small cross-sections (single-wall towers, thin brackets), the full 100% fan is what prevents drooping.

PETG Settings

PETG is trickier than PLA because of its tendency to string and its high bed adhesion.

Temperature

• Nozzle: 240-250°C. Lower temps increase stringing.
• Bed: 70°C on textured PEI (my recommendation) or 85°C on smooth PEI with a release agent (Magigoo PETG or hairspray).

Critical: Don’t print PETG on smooth PEI without a release agent. It will stick hard enough to damage the plate on removal.

Speed

PETG should be printed slower than PLA, especially on outer walls:

• Outer wall: 80-120mm/s
• Inner wall: 150-200mm/s
• Infill: 200-250mm/s

The slower outer wall speed is critical for stringing. PETG strings because it’s still viscous when the nozzle moves — giving it less time in open air reduces this.

Cooling

Less aggressive than PLA: start cooling fan at 30-50%, increasing to 70% on overhangs and bridges. Full fan on PETG can cause layer delamination on enclosed printers.

Retraction

PETG benefits from slightly increased retraction vs. PLA. In Bambu Studio with the default Bambu extruder: 0.8-1.2mm retraction. If you’re seeing ooze-based zits on outer walls, increase to 1.4mm.

ASA / ABS Settings

These materials require the enclosure. The following are for X1C and P1S only — not the A1 Mini.

Temperature

• Nozzle: 250-260°C
• Bed: 100°C on smooth PEI or Garolite
• Chamber: 35-45°C. On the X1C, enable the aux heater. On the P1S, close all panel access points before starting to retain ambient heat.

Warping Prevention

ASA/ABS warping is the main challenge. Mitigation strategies:

1. Brim: Add a 4-6mm brim on parts with small contact areas or sharp corners.
2. Draft shield: Bambu Studio’s draft shield keeps ambient warmth around the part.
3. First layer slow: 30-40mm/s on the first layer with 105°C bed.

Ventilation

Both ABS and ASA produce styrene fumes. Run in a well-ventilated area or with an activated carbon filter. The X1C’s enclosure retains fumes; don’t open the front door mid-print.

PA-CF (Carbon Fiber Nylon)

For PA-CF you need:

1. A hardened nozzle (0.4mm CHT or Bambu’s hardened brass) — standard brass will wear out in a few spools
2. Dried filament — nylon is highly hygroscopic. Dry at 80°C for 8+ hours before printing
3. High temperature: 280-290°C nozzle, 50-60°C bed on PEI

This material is unforgiving. Inconsistency in drying will cause bubbling and layer gaps that look like calibration issues but aren’t.

I don’t run PA-CF through the AMS. Load direct to toolhead.

TPU (Flexible Filaments)

95A Shore TPU settings:

• Nozzle: 220-235°C
• Bed: 40-50°C
• Speed: 30-50mm/s maximum. TPU cannot be printed fast — the material pillows and doesn’t retract predictably at speed.
• Retraction: Minimal to none. TPU stretches on retraction and often causes more issues than it solves. Set to 0-0.5mm.

Load TPU direct to toolhead, not through AMS.

Quick Reference Table

Material	Nozzle °C	Bed °C	Outer Wall mm/s	Enclosure Needed
PLA	215-225	55	150-200	No
PETG	240-250	70-85	80-120	No
ASA	250-260	100	60-100	Yes
ABS	240-255	100	60-100	Yes
PA-CF	280-290	50-60	50-80	Yes
TPU 95A	220-235	45	30-50	No

Tuning Order of Operations

When dialing in a new filament or brand, tune in this order:

1. First layer adhesion — get bed temp, first-layer speed, and Z-offset right before anything else
2. Temperature — run a temperature tower to find the sweet spot for stringing vs. layer adhesion
3. Speed — increase from conservative until quality degrades, then back off 20%
4. Cooling — tune fan settings to the specific material behavior
5. Retraction — adjust last; retraction problems often disappear after temperature is properly set

For deep dives on specific slicer settings within Bambu Studio — including support structures, infill patterns, and adaptive layer height — SlicerGuide has Bambu Studio-specific walkthroughs ↗.