Simple 3D Printing Guidelines for Ease of Mind

As your layer resolution; use multiples of the highest resolution your printer is capable of. In other words, make sure layer height is something your Z axis is capable of. (e.g. 0.24 for 0.06 capable printer — M5 threaded rod driven)

Stay under %80 of your nozzle size for Z axis resolution. (e.g. 0.3 for 0.4 nozzle)

It is good practice to keep wall thickness slightly less than your nozzle size (e.g. 0.35 for 0.4 nozzle)

Have the bed heated to 70 degrees even with PLA for good bed adhesion. Clas Ohlson PLA starts to pop off the bed at around 60 degrees.

A higher temperature for initial layer will give you a good bed adhesion for the first layer.

Use Z-offset plugin to push/adjust nozzle into the bed for even better bed adhesion & nice finish on first layer.

Test horizontal expansion with a hole test calibration print for different brand filaments and types. (e.g. ClasOhlson PLA has this value -0.023)

Keep retraction distance below or around 2–2.5 for bowden setups.

Never add a feature that effects or changes the main working flow of the printer. Any feature added should be in parallel to the working flow, and not in serial in any way involving changes to the reliable working flow. (e.g. dual nozzle print head)

Have a cleaning brush attachment to the printer with a GCODE in print startup to clean nozzle thoroughly before print. This will give you an ease of mind at starts with nozzle debris.

Have a lighting system on the print head for night time prints and thorough observation on the print.

It is good idea to upgrade fans to Noctua and Stepper Drivers to TMC for quiet operation. Many hours of buzzing noise is the perfect recipe to push you away from using your printer. This upgrade will ensure your printer runs quietly as well as better resolution thanks to higher bit resolution with TMC drivers.

Most automated bed leveling solution do not work well and cause headache. A simple bed mount and Z axis that allows manual calibration is better than any other. Although this is not possible in some printer designs with complicated motion designs (e.g. Delta, Voron)