Maintenance
From PROBOTIX :: wiki
Daily Use:
Put a couple of drops of 3-in-1 oil on each of the six linear rails before homing the machine each day. This will allow a tiny amount of oil to be sucked up into the bearing housings before cutting any parts.
Use the included linear motion grease on the leadscrews. A light coating is enough, as Delrin is self-lubricating. You can use WD-40 and an air nozzle to remove debris from the screw. Be sure to dry the screw of the WD-40 before re-applying grease as WD-40 is a solvent and will dissolve the grease.
All of the other bearings are sealed. The most important thing is to keep any dust cleaned off of the machine, especially if you are cutting abrasive materials such as MDF, fiberglass, or carbon fiber.
High Humidity Environments & Storage:
If you use your machine in a high humidity environment, ie in a shed or other non-airconditioned environment, or if you plan to store it without use, rust can form on the linear rails, leadscrews, and the black-oxide machine fasteners. Coat these surfaces with grease or WD-40 often. Again, be sure to dry the screws and rails of the WD-40 before re-applying grease and oil before use. The black-oxide machine fasteners will not need to wiped dry.