Weird layers alignment  

RE: Weird layers alignment

please put photo of first layer cal

RE: Weird layers alignment

how long ago did you lube rods and please put photo of the hotend

RE: Weird layers alignment

oh sorry and also what is your belt tension at

RE:

I’ve done the belt tension test with the STL downloaded from Prusa and calibrated in the mid of Low-High for both belts. 
Lube the rods a month ago. 
These are the requested photos

No worse than your fan shroud...

You probably should attend to your first layer and at least clean your print-sheet but it's not causing this issue.

First, with the power off, move the axis by hand; is it smooth? Does the resistance stay the same over the whole range?

Check your smooth rods are not damaged/scratched. Check the idler pulleys are not clogged, out of line, or damaged (loosen the belt and try turning it with your fingertip, is it smooth?)

With the belt loose try turning the stepper motor by hand; is it smooth? - You should feel the steps but no grating.

Let us know how you get on.

Cheerio,

RE: Weird layers alignment

Any crashes in statistics on printer 

RE: Weird layers alignment

Which fan shroud do you suggest? 

Posted by: @diem

No worse than your fan shroud...

You probably should attend to your first layer and at least clean your print-sheet but it's not causing this issue.

First, with the power off, move the axis by hand; is it smooth? Does the resistance stay the same over the whole range?

Check your smooth rods are not damaged/scratched. Check the idler pulleys are not clogged, out of line, or damaged (loosen the belt and try turning it with your fingertip, is it smooth?)

With the belt loose try turning the stepper motor by hand; is it smooth? - You should feel the steps but no grating.

Let us know how you get on.

Cheerio,

I noiced that your print fan shroud also shows poor layers - not a problem, it's still work ok.

Cheerio,

RE: Weird layers alignment

RE: Weird layers alignment

One thing you didn't mention is whether you tested the grub screws on the X and Y motors. That was my first guess seeing your initial pictures. Tighten them and make sure that one of the two on each axle is tightened against the flat side of the motor axle. After 5 years there's a reasonable likelihood they worked themselves loose.

RE: Weird layers alignment

Could you add some picture of what I have to check? I’m not English mother tongue and didn’t understand well what I have to control. 
thanks

RE: Weird layers alignment

RE: Weird layers alignment

All the screws are tightened and one is against the flat side. 
The smooth rods are in good condition. Sure not as new but good

RE:

I’m thinking about this don’t-know-how-it’s-called, that lets the head move up and down on the Z axis… Maybe it’s ruined

RE: Weird layers alignment

This

RE: Weird layers alignment

This what?

RE: Weird layers alignment

Sorry I posted a photo of the Trapezoid nut I was talking about. Don’t you see it in my previous post? Maybe it’s ruined 

RE: Weird layers alignment

Trapezoid nut I was talking about

I don't see any prior mentioning of the trapezoid nut in your previous posts, so this picture was out of context. Again, I'd check the grub screws, which I mentioned before and Joan posted pictures of.

RE: Weird layers alignment

the POM nut on the lead screw?

(Black thingie)