It is recommended to regularly take some time to maintain your Original Prusa XL. This should be done even if the printer is working perfectly. The inspection and maintenance of its various components should be done every ~200-300 hours of print time.
Besides the usual tools, such as Allen keys, needle-nose pliers, and IPA (IsoPropyl Alcohol) + paper towels, you might need:
Ensure that there is no debris or dust on the linear rails. If there is, clean them using a clean paper tissue or a clean cloth with NO de-greaser and with no chemicals, as these might damage the rubber in the carriage. The factory lubrication for linear rails is effective for at least 2 years.
After ~500 hours of print time, lubricate the Z-axis leadscrews: apply a tiny bit of Prusa Lubricant on the Z-axis leadscrews. After this, move the Z-axis all the way down, and then all the way up.
Attach the belt tensioner on the top belt on the X-axis. The belt tensioner has a pointer, check if it is in the optimal range. The ideal position of the pointer is in the center area, closer to the max mark.
All flexible steel sheets should be cleaned regularly to ensure adhesion, but the exact methods and washing solutions can differ depending on your type of sheet.
You can find more information on how to take care of your flexible steel sheet in this article.
The Original Prusa XL is equipped with a hotend fan, and with a print fan. The printer can detect if any of its fans stop spinning. However, that does not mean you should not check them during maintenance. Dust or plastic build-up can decrease their efficiency or even damage them.
Both fans should be checked and cleaned after a few hundred hours of printing. With the fan not moving, dust can be removed with compressed air in a spray can, small plastic threads can be removed with tweezers.
The primary gear and the bearings attached to the Idler Shaft in the extruder do not need any lubricant. Over time, a deposit of filament debris can form in the grooves of the primary gear, which then causes insufficient filament extrusion. Access the extruder by lifting the Idler Nut, and then moving the Idle Shaft. You can blow away the dirt with compressed air, or use a brass brush or an ordinary toothpick. Use the access hole on the side of the extruder.
In case the heaterblock is covered with plastic, it can affect its thermal properties. To clean it, heat the nozzle for 3 to 5 minutes at 250 °C, and turn the printer off. Immediately after that use a small brass brush to clear away any old plastic stuck on the nozzle and heaterblock. Be extra careful around the fragile wires that join the heaterblock.
Every ~600-800 printing hours access the electronic boards for a visual check.
You should always be using the latest stable firmware version that we have published for your specific printer model. You can check the firmware version you have, by navigating to LCD menu - Info - Version info.
We also recommend using the latest version of our PrusaSlicer, as it enables you to enjoy all the features of your printer. It even saves information about the printer model, nozzle diameter, and firmware version directly into the g-code file so that the printer can warn you if anything is out of date or incompatible.