TPU settings for the Bambu Lab P1S
A starting profile for printing TPU on the Bambu Lab P1S (256 × 256 × 256 mm, enclosed, direct drive). Tune from here with a temperature tower and a flow test.
| Setting | Starting value |
|---|---|
| Nozzle temperature | 220–240 °C (start 230) |
| Bed temperature | 40–60 °C (start 50) |
| Print speed | 25 mm/s |
| First layer speed | 20 mm/s |
| Layer height | 0.2 mm (0.12–0.28) |
| Retraction distance | 0.4 mm |
| Retraction speed | 20 mm/s |
| Part cooling fan | 30% |
| Enclosure | Open |
| Drying before use | 50 °C for 6 h |
Direct drive makes TPU much easier. Keep retraction under 0.5 mm and print slowly. TPU absorbs moisture. Dry it at 50 °C for 6 h before a long print.
Why these values
The Bambu Lab P1S is a direct-drive machine, so retraction can stay short (around 0.6 mm). Its usable speed is around 500 mm/s, so the 25 mm/s above is within the comfortable range for this material.
Cooling is set to 30%: a middle setting balances surface quality against layer bonding.
Next steps
- Print a temperature tower across 220–240 °C and pick the cleanest band.
- Calibrate flow, then check the volumetric flow against your hotend.
- If something goes wrong, see the troubleshooting guide.
- Price the part with the cost calculator.