Elegoo Neptune Max 4: What should I attempt to fix it?

Hi!

I'm hoping someone else has run into the same issue and can give me some hints what I might try to fix this.

My problem is that over time, the z-axis positioning of my relatively new Elegoo Neptune 4 Max seems to become slightly unstable. That is, after I level the bed and adjust the z-offset, everything looks fine. However, if I move up and down by a couple of centimeters for a few times, the z-offset is wrong again.

Due to this, I had to restart quite a few prints now, because wrong z-offset leads to a bad first layer.

Now I wonder what I should attempt first in order to fix this?

5 Comments

ExcessShiv@lemmy.dbzer0.com · 3 pts · 216d (4 replies)

start by checking the coupling between Z-stepper and threaded rod, it may be slipping if it has become loose.

soulsource@discuss.tchncs.de · 1 pts · 216d (3 replies)

Thanks, gonna do that first before I start my next print. This sounds like a really plausible cause!

ExcessShiv@lemmy.dbzer0.com · 2 pts · 216d (2 replies)

Even if it feels tight, give the grub screws a tightening just for good measure, maybe some loctite if you have.

soulsource@discuss.tchncs.de · 2 pts · 169d (1 reply)

I finally printed something again yesterday, and, as far as I can tell, the z-positioning was perfectly stable thanks to your suggestion.

Thanks a lot!

ExcessShiv@lemmy.dbzer0.com · 1 pts · 169d

Awesome, great to hear