UMO+ Bed scrachy sound up/down

[neotko 1,417]

Hi,

I'm assembling my umo+ kit. And after assembling the bed it does a sound up and down like a 'scratchy' sound, sandy, don't know how to describe it. It's greased as the manual says. I though was that after aligning the linear z it was going to go but it doesn't. I have not assembly the head/board yet since I wanted to do that last.

Here's the video this morning before screwing the z linear bearings. (greased)

 

Here's the video a few minutes ago (applied more grease).

 

It's this normal? My other umo+ goes up and down smothly (that other I bough preassembled).

The sound seems to come from the z rod.

[neotko 1,417]

Took the z screw off and the noise comes from the big linear bearings. Unscrew the x8 ones and did align all again. The sound it's there. There's friction going down. The bearings release some kind of oil naturally and I read somewhere that z shafts don't need oil. What could I do?

[macua85 52]

Yup I have this noise too, always had it. As you say its the linear bearings. It causes a little extra friction on mine too.No idea what causes it, but it doesn't seem to affect the operation.

[neotko 1,417]

Thanks macua. I was assembling the second bed and does that too. Much less but it does. Must be something without importance. Thanks!