The first thing you need to do after assembling your printer is running the Selftest procedure. This routine checks for the most common issues in the build quality and electronics wiring.
For MK2.5/MK2.5S printers that have the SuperPINDA installed, you MUST use firmware version 3.9.3, or above!
The Selftest prompt appears automatically on the screen once you turn on the printer for the first time. To start the Wizard, select YES by pressing the knob. You can manually start the Wizard at any time from the LCD Menu - Calibration - Wizard.
This procedure should not be necessary for pre-assembled printers.
After the initial calibration, the Selftest can be found in LCD Menu -> Calibration -> Selftest
Selftest procedure checks
Extruder and print fan functionality
Heatbed and hotend wiring
XYZ motors wiring and functionality
XYZ endstop mechanical settings and wiring axis length
Loose belt pulley test
Both progress and result of each step are displayed on the LCD screen. If the self-test process runs into an issue, the LCD screen will display a corresponding error message. All errors are described below.
Be aware that if both end stops are incorrectly mounted, Selftest will not be able to recognize the mistake. If you need to re-assemble the wiring, be extra careful.
Loose belt pulley test
Loose pulley - {XY}:
Make sure that both pulleys are properly tightened. If any of them is loose, then the motor's shaft won't be able to move the axis.
Make sure that your belt isn't extremely loose, as it might be just going around the pulley without actually moving either of the axes.
