Hi
I have a problem with the Z Axis on my Ender 3 Pro. The printer has performed well but has now developed an error in the Z Axis. The first few layers are good. On subsequent layers the nozzle moves up 0.1 mm greater than the layer height. The result is that the nozzle gets further and further away from the work piece until it is too far away to make the filament adhere to the previous layer. At around 6 to 8 layers the gap is so great that the nozzle starts to string spegetti and I terminate printing manually. I believe the error is in the firmware but need help calibrating the Z Axis. Mechanically all relevant parts are correct. Another possible cause is that the stepper motor has gone unstable but I think that is less likely. I'm using Cura as a slicer and I don't think there are any issues there. Any advice would be gratefully accepted.