Bambu Lab X1C and AMS Maintenance

Maintenance checklist for the Bambu Lab X1 Carbon printer and its two filament units, the AMS 2 Pro and the original AMS (Gen 1). It follows Bambu Lab's guides:
Bambu Wiki: X1 Basic Maintenance
Bambu Wiki: AMS Basic Maintenance
Bambu Wiki: AMS 2 Pro hub
X1 Series Regular Maintenance Manual (ManualsLib copy)
How often
Interval
What
Every 3 to 5 days if ABS is printed often
Clean the Micro Lidar window
Every 2 weeks
Check AMS desiccant and humidity
Monthly (every 5 rolls if printing ABS/ASA)
Clean carbon rods and re-tension belts
Every 2 months (monthly with abrasive filaments)
Replace AMS PTFE tubes
Every 3 months
Grease Z lead screws; replace the activated carbon filter under heavy use
As needed
Nozzle wiper, nozzle, silicone sock, build plates
Supplies
IPA (90% or stronger) and lint-free or microfiber cloths
Grease for the Z lead screws (Bambu suggests Super Lube 92003 or Lucas 10533, or the grease from the Bambu accessory box)
H2.0 hex key and the X1 accessory box tools
Compressed air, brass brush, tweezers
Spare nozzle wiper, spare PTFE tube (4 mm OD), fresh desiccant if available
Do NOT grease the X-axis carbon rods. Grease causes abnormal resistance and makes cleaning harder; the bearings are self-lubricating. Power off and unplug the printer before any mechanical work.
X1C printer
1. Before you start
Unload filament from the AMS units.
Note the firmware versions (printer, AMS 2 Pro, AMS) in Bambu Studio or Bambu Handy.
2. General cleaning
Vacuum or brush debris from the chamber floor, bed area and purge chute.
Empty and clean the purge waste bin area.
3. Carbon rods and belt tension (do these together)
Procedure: Bambu Wiki: Carbon rods clearance and cleaning
Loosen (do not remove) the four belt tensioner screws at the back of the printer.
Press on the belts next to the toolhead and confirm the tensioners move.
Wipe each X-axis carbon rod with IPA on a lint-free cloth. Repeat 2 to 3 times until the cloth comes away clean.
Move the toolhead to the center of the build area and retighten the tensioner screws. This re-tensions the belts.
With the printer off, move the toolhead by hand from corner to corner. Motion should be smooth with no grinding.
4. Z-axis lead screws (every 3 months)
Wipe dust and plastic off all three Z lead screws.
With the bed homed (at the top), apply a thin coat of grease.
Lower the bed, apply another thin coat, and home again. Repeat a few cycles to spread it.
Wipe off excess grease that builds up near the lead screw nuts. Too little is better than too much.
5. Nozzle wiper
Check the wiper for filament debris and a damaged PTFE side. It must sit horizontal.
Replace it if the plastic structure is deformed or cracked, or if it slips (Bambu nozzle wiper part).
6. Hotend and extruder
Heat the nozzle and brush residue off the nozzle and heater block. Inspect the silicone sock and replace it if torn.
Do a cold pull if there are any signs of partial clogging (see the X1 nozzle clog troubleshooting page on the Bambu Wiki).
Inspect the nozzle tip for wear, especially if carbon fiber or glow-in-the-dark filaments have been run on the stock nozzle.
Open the extruder idler and brush filament dust from the drive gears.
7. Micro Lidar
Clean the Lidar window with IPA on a microfiber cloth.
8. Activated carbon filter and fans
Check the carbon filter. Replace it about every 3 months under heavy use (Bambu Wiki: Replace the activated carbon air filter).
Blow dust out of the part cooling fan, auxiliary fan and chamber fan. Hold the blades still.
9. Build plates
Wash each plate with warm water and dish soap, and dry it fully.
Note any worn or scratched plates.
10. Cables and PTFE path
Check the toolhead cable and flat ribbon cable for kinks or wear.
Inspect the PTFE tube from the AMS hub to the toolhead for wear or kinks.
AMS 2 Pro and AMS (Gen 1)
11. PTFE tubes
Inspect all AMS PTFE tubes (slot to hub, and hub to printer) for wear grooves, kinks or loose ends.
Replace them about every 2 months under normal use, or monthly if printing abrasive filaments (carbon fiber, glow-in-the-dark).
Confirm every tube is fully seated in its connector.
12. Feeders and filament path
Remove any broken filament pieces from the feeders and hub. Pushing a good, non-brittle piece of filament through the first-stage feeder pushes debris out.
Check the feeding funnels for wear. Replace them if badly worn and causing feed or retract errors.
AMS 2 Pro: clean the filament hub per Bambu's hub cleaning guide (AMS 2 Pro hub). If a feeder needs replacing: Replace feeder unit.
AMS Gen 1: check that the spool rollers and support shafts spin freely, and clean dust off the rollers.
13. Desiccant and humidity
Check the desiccant and humidity indicator in both AMS units. Dry or replace the desiccant as needed.
Confirm the lids seal.
14. AMS test
Load one spool in each slot of both units and run a load and unload on every slot.
Run a short multi-material print that pulls from both AMS units.
15. Recalibrate the X1C
Power on and run the full Calibration from the printer screen (bed leveling, vibration compensation, motor noise cancellation, Micro Lidar).
Update firmware for the printer and both AMS units if they are behind.
Print a small test part and inspect the first layer.
Afterwards
Record anything you found, what you did about it, and whether follow-up is needed. If the printer is not safe to use, tag it out of service: see Shop Safety: Tagging a Tool Out of Service and Reporting It.