Bambu Studio Presets Explained
What each default temperature optimises for, which settings are safe to change, and how to use calibration tools correctly.
Why presets exist (and why they're conservative)
Bambu's built-in presets are engineered to print successfully across the widest possible range of filament brands and environmental conditions — not to produce the best output for any specific spool. That's a deliberate design choice.
Bambu supports roughly 20+ third-party filament brands in their official preset library, and each formula behaves differently. A PETG preset that works for Bambu-brand PETG must also work for budget PETG from a generic supplier. The only way to guarantee this is to default to parameters that err on the side of running hot enough and slow enough that almost all PETG formulations will successfully fuse and adhere.
This means the presets have margin built in. Once you know your specific filament, tuning down from the default usually gives better results — less stringing, tighter tolerances, better surface finish.
Default temperature logic by material
| Material | Nozzle Default | Bed Default | Why This Number | Safe Range to Try |
|---|---|---|---|---|
| PLA | 210–220°C | 35–40°C | Enclosure raises ambient temp 3–8°C; 210°C inside = ~205°C effective in open-frame equivalent | 200–215°C nozzle; bed optional on PEI |
| PETG | 250°C | 70°C | Wide PETG formulation range; under-temp is worse than over-temp (delamination vs. stringing) | 240–255°C nozzle; 65–80°C bed |
| ABS / ASA | 250–260°C | 100–105°C | Requires sustained heat for proper interlayer adhesion; enclosure required to hold these temperatures | 245–265°C nozzle; 100–110°C bed |
| TPU 95A | 230–235°C | 35–40°C | Flexible; higher temps reduce gear skip but increase stringing on travel moves | 220–240°C; slow speed (25 mm/s max) |
| PLA-CF / PETG-CF | 220–240°C | 55–70°C | Carbon fibre fill increases viscosity; +10–15°C above base material default compensates | Match base + 10°C; use hardened nozzle |
| PA (Nylon) | 260–280°C | 70–85°C | High crystallisation temperature; very moisture-sensitive; dry filament critical | 255–285°C; enclosure required |
The four built-in quality presets
Bambu Studio offers four standard quality levels under the print profile selector. Each is a coherent package — layer height, speed, and acceleration are all coordinated. Changing just one parameter inside a preset can unbalance the others.
| Preset | Layer Height | Print Speed | Best For | Time Multiplier |
|---|---|---|---|---|
| High Quality | 0.10 mm | ~60–100 mm/s | Detailed figurines, mechanical parts requiring tight tolerances | 3–4× Standard |
| Standard | 0.20 mm | ~150–200 mm/s | Most everyday prints; functional parts; prototypes | 1× (baseline) |
| Draft | 0.28 mm | ~200–300 mm/s | Quick prototypes, fit tests, objects where surface quality doesn't matter | 0.6× Standard |
| Optimal Strength | 0.20 mm | ~100–150 mm/s | Functional prints where layer adhesion matters more than speed | 1.5× Standard |
When to use High Quality: Only after the printer is well-calibrated. High Quality magnifies calibration errors — a flow ratio that's 2% off is invisible at 0.2mm layers but visible at 0.1mm. Fix Standard first.
Calibration tools: what each does and when to run it
Bambu Studio's calibration tools (under Calibration in the top menu) are the primary mechanism for moving from the conservative preset defaults to dialled-in settings for a specific filament spool.
Flow Rate Calibration
What it does: Prints a series of single-wall lines at incrementally different flow multipliers (typically 0.90–1.10× in steps). The lidar sensor on X1 and P1 series scans each line and finds the multiplier that produces the target line width. On printers without lidar (A1), you measure visually.
When to run it:
- First spool from a new brand
- After a firmware update that resets calibration data
- When surface quality degrades unexpectedly
- When switching from one PLA formulation to another (even same brand, different colour)
Output: A flow ratio value (e.g. 0.97 or 1.03) saved per-filament. 1.00 is the Bambu spool default. Values outside 0.93–1.07 suggest the filament itself is out of spec.
Pressure Advance (PA) Calibration
What it does: Compensates for the lag between the extruder command and actual material extrusion through the hotend. Without PA correction, corners are rounded (material arriving too late) or bulged (material still arriving after the direction change). Bambu's default PA values are material-type averages — calibrating per-spool sharpens corners on detailed prints.
When to run it:
- After flow calibration on a new filament (run in this order: flow first, then PA)
- When corners on your prints appear rounded or over-extruded
- After a nozzle swap
First-Layer Calibration
What it does: Adjusts the nozzle-to-bed gap by printing a single-layer test pattern and detecting it with the lidar. The result is stored as a Z-offset value. On P1S, this runs automatically before the first print of a session if the plate hasn't been removed since the last calibration.
When to run it manually:
- After any firmware update
- After replacing or cleaning the build plate
- If first layers aren't sticking despite good bed temperature
- After moving the printer (vibration can shift the compensation values)
Settings safe to change vs. settings to leave alone
| Setting | Safe to Change? | Notes |
|---|---|---|
| Nozzle temperature | Yes — ±15°C from default | Reduce for less stringing; increase for better layer adhesion on high-fill PETG/CF |
| Bed temperature | Yes — within material limits | PLA can often print bed-off on PEI; PETG needs 70°C+ for adhesion |
| Print speed | Cautiously | Bambu's speed is set against their input shaping calibration. Increasing beyond 300 mm/s without re-running resonance calibration can cause ringing artifacts |
| Flow ratio | Yes — after calibration only | Do not guess; run Flow Calibration first. Guessing flow ratio compounds errors |
| Acceleration | No — leave at preset default | Bambu acceleration values account for resonance compensation. Changing without re-running resonance calibration causes ringing |
| Layer height | Yes | Must be ≤ 75% of nozzle diameter. 0.4mm nozzle: max reliable layer height = 0.3mm |
| Infill % | Yes | 15–20% is sufficient for most functional parts; 40%+ only for impact-critical applications |
| Support type | Yes | Tree supports (organic) work well for complex geometry; Normal supports easier to remove from flat overhangs |
| Resonance (vibration) compensation | No — run calibration instead | These values are measured, not guessed. Changing manually without a calibration run introduces ringing |
Third-party filament in Bambu Studio
Bambu's preset library includes profiles for a growing list of third-party filament brands (Prusament, Polymaker, eSUN, etc.), accessible through Filament → Generic > [Brand] in the print profile panel. These profiles have tested temperature and flow defaults specific to that brand's formulation.
If your brand isn't listed, use the closest Generic preset as a starting point:
- Generic PLA for any unknown PLA — 210°C nozzle, 35°C bed
- Generic PETG for any unknown PETG — 250°C nozzle, 70°C bed
- Generic ABS for ABS/ASA — 250°C nozzle, 100°C bed
After the first successful print, run Flow Calibration and adjust nozzle temperature in 5°C steps to optimise surface quality. Save the tuned profile under a custom name (e.g. "eSUN PLA+ Black tuned") so you don't need to redo it for that specific spool colour/brand combination.
Important: Bambu's filament RFID chips are optional for third-party use. The printer will prompt to confirm material type manually when loading a non-Bambu spool, which is fine. The RFID auto-sets material type and nozzle temp as a convenience feature, not a requirement.
Common firmware update issues
Bambu releases firmware updates roughly every 4–8 weeks. Most updates are minor and print safely without recalibration. A small number of updates affect the motion control or sensor baseline and require manual recalibration steps.
After a major firmware update, run in this order:
- Calibration → Lidar Calibration (only if prompted or if you notice scan errors)
- Calibration → Vibration Compensation (resonance — if print quality degraded after update)
- Calibration → First-Layer Calibration
- First test print — Standard quality, single material, medium complexity
- If surface quality is acceptable: Flow Calibration per spool if stringing changed
If calibration fails to complete or loops repeatedly, check the Bambu community forum for whether the firmware version has a known calibration bug. This is rare (roughly 1–2 firmware versions per year), but it does happen. Rolling back firmware is possible through Bambu Handy app settings.
FAQ
Why does Bambu Studio default to 210°C for PLA instead of 200°C?
Bambu's 210°C default for PLA accounts for temperature variation in their sealed enclosure. A P1S running at 210°C is printing at the effective equivalent of an open-frame printer running at ~205°C. The enclosure raises ambient air temperature around the filament path by 3–8°C depending on room conditions, so Bambu calibrated presets slightly higher to compensate. Lowering to 200°C in a warm enclosure is fine and often reduces stringing on detailed parts.
What does Flow Calibration actually measure?
Bambu's flow calibration prints a set of lines at different extrusion multiplier values, then uses the lidar sensor to scan each line and find the multiplier that produces lines closest to the target width. The result is stored as a per-filament flow ratio. After a firmware update or a new spool, running this calibration prevents over- or under-extrusion that would otherwise appear without any obvious cause.
Should I use Standard or High Quality preset for my first print?
Use Standard (0.2mm layer height) for first prints. High Quality (0.1mm) takes 2–4× longer, is more sensitive to vibration and temperature fluctuation, and makes it harder to diagnose problems. Once your printer consistently produces good Standard results, High Quality becomes a predictable upgrade rather than a troubleshooting complication.
Why does PETG preset default to 250°C when some spools print at 240°C?
250°C is a safe default across the broadest range of PETG formulations. Budget PETG, filled PETG (CF, GF), and slow-flowing PETG all benefit from higher temperatures, which is the dominant failure mode if the preset runs cold. Over-temp PETG strings more but prints; under-temp PETG delaminates or clogs. For high-quality PETG from brands like Prusament or Polymaker, dropping to 240–245°C typically reduces stringing without affecting adhesion.
What happens if I skip first-layer calibration after a firmware update?
Firmware updates can reset the motion compensation parameters that govern how the P1S compensates for nozzle sag and thermal expansion. Skipping first-layer calibration after an update often causes the nozzle to print slightly too high (first layer doesn't stick) or too low (nozzle scratches the plate). Always run Calibration → First-layer Calibration from the touchscreen after any major firmware update.
Can I use my own presets from older Bambu Studio versions?
Yes, with caution. Bambu Studio stores profiles in a local library you control. However, major Bambu Studio updates sometimes change how parameters like acceleration and pressure advance are stored, which can cause older profiles to be imported with incorrect values. After importing an old profile, compare its key settings against the current equivalent built-in profile to check for large discrepancies before printing.