3D Printer Maintenance Checklist

This 3D printer maintenance checklist groups the jobs by how often they come up. The intervals below come from the published maintenance pages of Bambu Lab (A1 and P1 series) and Prusa (CORE One). This is desk research from manufacturer documentation, not a test of any printer. Other models differ, so treat the numbers as a sensible starting point and check your own manual.

The checklist at a glance

Before every print: keep it clean

Prusa advises checking a few things before every print. First, keep the printer free of debris. After several hours of printing, filament pieces, dust, broken supports and scraps collect around the printer and under the heated bed. A brush, small broom or vacuum is enough.

Second, clean the hotend. Prusa describes heating the nozzle to 250 °C for three to five minutes so old filament softens, then using a small brass brush to clear plastic from the nozzle and heater block. Keep the brush away from the hotend cables to avoid a short circuit. Heated parts can cause severe burns, and Prusa says the hot parts take roughly 10 minutes to cool to ambient temperature, so check the display before touching anything.

Third, look after the print surface. Prusa warns that acetone should only be used, sparingly, on the smooth print sheet. It must never be used on the textured or satin sheet, and the special PA Nylon sheet must never be cleaned with acetone or alcohol-based solvents. If a first layer will not stick, a dirty sheet is the most common cause, so see our guide to fixing a bad first layer. Our explainer on build plates covers the sheet types.

Weekly and monthly: fans, rails and rods

Bambu Lab lists the A1 part cooling fan and hotend cooling fan as weekly checks: look for foreign objects or dust in the air duct and clean them out with a cloth or tweezers. Prusa suggests checking both fans after every few hundred hours of printing and says never to blow compressed air on a running fan.

For the A1's X and Y rails, Bambu Lab recommends a monthly clean and lubrication. Use tweezers to remove lumpy or stringy debris, wipe off fine particles and stains with a dust-free cloth, re-lubricate with lubricant oil, then slide the tool head or bed back and forth so the oil spreads along the whole rail.

The P1 series is different. Its X-axis carbon rods get no grease at all: Bambu Lab says to wipe them with isopropyl alcohol on a clean microfiber cloth about once a month, and warns that grease causes buildup and premature wear. The Y and Z linear rods are also checked monthly, or every five rolls of volatile filaments such as ABS and ASA. If you clean them with isopropyl alcohol, Bambu Lab says to apply a thin uniform coat of oil or grease afterwards to prevent rust, and to keep the alcohol away from the bearings.

Every few months: lubrication

Z-axis lead screws need grease about every three months on both brands' documentation. On the P1 series, clean off dust and plastic particles first, apply a thin coat of grease, move the bed, apply another thin coat, then home the printer again and clean excess grease near the lead screw nuts. On the A1, Bambu Lab also lists the X and Y idler pulleys as a three-month job using lubricant oil.

When removing covers to reach idler pulleys, follow the maker's warnings. Bambu Lab cautions that on the A1 the tool head can slide off the end of the X rail once the purge wiper and cover are removed, which can let ball bearings fall out. It suggests securing the tool head with a zip tie.

Nozzle, extruder and belts

Bambu Lab suggests cleaning the A1 nozzle and extruder gear every five spools for PLA and PETG, and every two spools for carbon fiber filaments, and replacing a worn nozzle or gear if cleaning does not restore normal extrusion. Debris in the extruder grooves is a classic cause of weak extrusion, so if you see gaps in walls, read fixing under-extrusion and fixing a clogged nozzle.

Belts are checked differently by each maker. The A1 checks tension automatically and prompts you through its HMS system when a belt needs re-tensioning. Prusa suggests printing a circular object: if it comes out visibly not round, the belt needs adjusting. Loose belts can lead to layer shifting. After mechanical work, a fresh calibration is a good idea.

Small things people forget

• Printer panels. Prusa says to clean CORE One panels with an alcohol-free cleaner or soapy water, because alcohol can make them brittle over time.
• Filament moisture. Not a printer part, but wet filament mimics a worn nozzle. See how to dry filament.
• Spare parts. Both brands sell maintenance parts. Having a spare nozzle on hand turns a clog into a ten minute job.

Keep a simple log

A note with the date of the last lubrication and the spool count since the last nozzle clean is enough. It stops you guessing, and it makes it easy to see whether a new problem started after maintenance or after switching material. Running costs include parts as well as power, so see 3D printer running costs for the wider picture.