Define a process for precise FDM printer calibration

see

• How I tune 3D Printers (The 100)
  • derived from Andrew Ellis bellow
• Ellis’ Print Tuning Guide
• Teaching Tech 3D Printer Calibration

PreRequesite

• a printer that is able to print something (first layer ok)

Next

There is 2 main factor that drive precision

• mechanics of the printer (squareness/flatness proper bed adhesion)

• material printed

• squareness - can be somewhat compensated by software (as well as flatness)

• Flow Good results mandate a proper flow (which may depends on material being printed) A Good flow
• will diminish elephant foot
• will give better surface finishing

It’s difficult to evalute flow on first layer, since first layer heigth is also at play.

• dimension accurracy This is link to horizontal expansion as well as material shrinkage.

• hole dimension
• this can be compensated by software.