Printer head

[paula_cutters 0]

Hello, I have a problem with printer head. Ender 3 V2 Neo. 

When printing is finished and the confirm button is pressed, the printer head slides down until nozzle touch the bottom.

maybe the screw needs to be tightened, but I don't know which one?

[GregValiant 984]

"When printing is finished and the confirm button is pressed, the printer head slides down until nozzle touch the bottom." 

I'm not sure what a "Confirm" button is.  Could you explain a bit more?

If the "Z" axis gets disabled at the end of a print it can drift down.  The "Ending G-code" of the Ender 3's tell the printer to move the bed to the front ("Present Print") and to disable "all steppers except Z".

If the Z stepper disables then the weight of the X beam assembly can cause the whole thing to drift down.  It may be related to how tight you have the trolley wheels on the ends of the X beam.  You should just be able to turn them with your fingers.  Even when adjusted correctly, some printers still will have the Z drift down when the Z stepper disables.

 

In Cura - go to Manage Printers, Machine Settings.  Copy the "Ending G-Code" and paste it into a response here.  There should be a line:

 

M84 X Y E ;Disable all steppers but Z

 

(it might be an M18 line as M18 and M84 are inter-changeable).

If the line is only "M84" then copy the one above and paste it in.