If you're building a printer you designed yourself, awesome.
If you're building a printer someone else designed, good luck ;)
If you're building a kit you purchased, don't be shy about bothering the manufacturer.
If your printer is already fully assembled and ready to go it's still a good idea to skim through here as an educational thing.
General construction- Read the instructions all the way through before starting
- Keep good notes
- Measure twice, cut once
- Don't take risks with your eyes and hands
- Respect the danger of things that get hot, power tools, and fumes in confined spaces
- The linear motion elements must be rigid (no flex), consistent (same dimension everywhere), and tough (high wear resistance)
- all moving parts must be properly lubricated
- all fasteners must be properly tightened
- all wires must be secured so that they do not catch on moving parts, rub on edges, or bend too sharply
- anything that heats up must be isolated (distance, active cooling or insulation)
- anything that heats up must be allowed to expand and contract
- anything that comes in contact with molten plastic will wear out sooner or later
- The X, Y and Z axis must be perfectly aligned
- If there are two linear controls for one axis they must be parallel
- Each axis must be perpendicular