TPU
TPU Print Settings Guide
A practical TPU settings guide for flexible filament, slow printing, retraction control, direct-drive printers, extrusion path friction, and usable first prints.
Slow down
TPU punishes speed and friction. Start slower than PLA and reduce aggressive acceleration.
A direct-drive printer is easier for TPU, but Bowden setups can work with conservative speed and careful filament path control.
Quick diagnosis path
Symptoms this guide helps with
- jams
- stringing
- under-extrusion
- poor flexible print quality
Likely causes
- Printing too fast
- Retraction too aggressive
- Moist TPU
- Flexible filament path friction
Fast checks before changing settings
- Slow print speed
- Minimize retraction
- Check spool path
- Use Filament Advisor
Safest first fix path
Dry/check filament
Slow down
Reduce retraction
Simplify first test model
Save TPU profile
Retraction and pressure
Too much retraction can stretch or buckle flexible filament. Use low retraction and focus on clean extrusion.
Avoid overly tight spool paths, sharp filament bends, and tangled spools.
Adhesion and removal
TPU can stick strongly. Use a safe build surface and avoid damaging PEI by over-squishing the first layer.
Use a small test object before trying a large flexible product.
Quick checklist
- Slow speed
- Low retraction
- Clean filament path
- Dry filament
- Safe adhesion
- Small test print
Use this checklist before changing multiple settings. Controlled troubleshooting beats random profile edits.