I don’t see any info on maintenance such as any lubrication for rollers, cleaning fluids to clean the rails, etc. Are there any suggestions.
welcome to the forum…
basics…
- keep the rails clean on all sides…wipe them down often all around
- when the rails get dirty clean then and clean the sufcace of the bearings.
- spray and wipe the rails with WD40 works great
- get some “electrical contact cleaner” spray. this is used to clean the Z axis area when it gets dirty…spray it down…blow it dry with compressed air…spray some WD40 there and blow it dry.
- clean the rails and rollers on the Z axis when cleaning the electronics inside the Z axis
- clean the drive screws and wipe them down. use a light machine oil****do not use grease or heavy oils***** I like sewing machine oil.
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Excellent advice!! 
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that is because I am one of those people who can not do it so I teach it…ahahahahaha
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