Bambu Lab
4-Spool Sealed Desiccant Multi-Color Hub
Bambu Lab AMS Enclosed Maintenance Guide: Desiccant, Feeders & Hub Service
The 3D Printing Glossary">Bambu Lab AMS is a sealed, airtight 4-filament manager with active humidity tracking and automated filament switching. Regular desiccant renewal, rubber roller cleaning, and filament hub de-clogging ensure reliable multi-material printing without jams.
Key Maintenance Principles
- Renew silica gel / activated alumina desiccant packs every 30 days (or when humidity meter exceeds Level 2).
- Wipe black rubber drive rollers with IPA every 60 days to restore traction.
- Inspect first-stage feeder funnel buttons every 45 days for filament grooving.
- Clean bottom filament hub and hall sensors every 90 days to clear brittle filament fragments.
1
Desiccant Renewal & Humidity Seal Check
Recommended Interval: Every 30 Days
Required Tools & Supplies:
Fresh Desiccant Packs (Silica Gel / Activated Alumina)
Step-by-Step Instructions
- Open the 3D Printing Glossary">AMS lid and remove all 4 filament spools.
- Lift the internal main frame to access the two desiccant slots under the spool bays.
- Replace discolored/saturated desiccant packs with fresh or oven-recharged alumina packs.
- Inspect the perimeter rubber gasket to ensure an airtight lid seal.
Important Caution:
Never let broken silica gel beads loose inside the 3D Printing Glossary">AMS as they can jam motorized gearboxes.
2
Driven Rollers Traction & Gear Cleaning
Recommended Interval: Every 60 Days
Required Tools & Supplies:
99% IPA WipeLint-free Cloth
Step-by-Step Instructions
- Rotate each roller manually while wiping with an IPA cloth.
- Ensure the rubber rings are seated firmly in their plastic rims without slipping.
Important Caution:
Cardboard spools generate extra dust—use plastic spool adapter rings or tape edges.
3
Filament Hub & Selector Cleaning
Recommended Interval: Every 90 Days
Required Tools & Supplies:
Hex KeyAir BlowerTweezers
Step-by-Step Instructions
- Unscrew the bottom filament hub assembly from the lower casing.
- Blow away brittle broken filament pieces caught in the 4-to-1 merging block and magnet sensors.
- Verify the exit spring buffer moves freely without binding.
Important Caution:
Always handle internal ribbon cables with care when lifting the mainboard.
Frequently Asked Questions
What should I do if the AMS humidity indicator turns yellow or red?
Replace the desiccant packs located beneath the spool slots immediately and close the lid for 2-3 hours until the humidity index drops back to Level 1 or 2.
Why are cardboard spools slipping in the Bambu AMS?
Cardboard edges can crush or shed dust onto the rubber rollers. Wipe rollers with IPA and snap reusable plastic rim rings around the cardboard spools.