bardiir wrote: ↑
Sun Sep 17, 2017 12:14 pm
...Does the Prusa notice when it comes close to loosing steps while traveling due to increased friction? ....
no, the prusa doesn't "know" where the x-axis really is, it can only calculate it's position by the forward/backward (baby-)steps of the x-motor. there is no hardware to "measure" the position of the extruder carriage during the print (only when homing through the x-/y- endstops).
so if something "interferes" with the movement of the x-motor (slipping pulley, binding bearings, hotend/pinda hitting some upcurling part of the print, cable trunk hitting something .... etc.) you'll get the layer shift we can see at your print.
to reduce issues due to a bad assembly, the selftest (after finnishing the build) does stress the movements of the carriage and the bed with forced high accellerations.... and "looks" afterwards if it could detect the calibration points of the heatbed at the same locations as before.
but during the print, the printer only can calculate the position of the nozzle... which might differ from the real position due to forces that interfere with the moving mechanisms.
dem inscheniör is' nix zu schwör...