Edge not 100% straight

[novawaves]

hi

after i printed a calibration cube i see that the z edges of the cube are note 100% straight.

i looks likes a liite zig zag but only very very little zig zag. is there a solution for this?

is the temperature to high so that the pla dissolves unter the presure of the above layers? what do you mean?

here is a example of the printed object

20200401_075218.jpg (84.09 KiB) Viewed 25415 times

[William]

Hi, You can see if the z-axis threaded rod is bent
Check if the z-axis fixing plate is loose,
Tighten if loose.

[novawaves]

hi

now i have disassembled my rod and stepper motor

in the video you can see that the attachment of the rod is not in center

https://youtu.be/UcZLsw5gh54



i try different methods to center it but without success

do you have a solition for my problem?

thx

[William]

Hi，do you mean the position of the coupling
You can adjust it with tools,
You need to see if the z-axis threaded rod is bent,
Whether the z-axis fixing plate is loose,
Because the ripple may be caused by the z-axis shaking.

[novawaves]

the rod is a little bit bend and i correct it a little.

but the couple on the video is also not in center therefore i think it is a problem because it shake the rod or isnt it?

can you please descripe how to center it correct

thx