3D Printing Forum

Sounds like a rough spot in the z rods? Or really bad bearings?

Since it happens in any location on the rods if you repeat the procedure manually...the bearings are more than likely to be the problem. New ones arrived in the office today so I will pick them up tomorrow...lets just hope that they are better...even though they still are from Ultimaker

Are they Mitsumi?

Don't know yet...but I have no hopes for that. It will probably be the same

If you just received them from 3DVerkstan i do think that we actually ship Misumi bearings nowadays. (but i am not in charge of spare parts, IRobertI knows this better)

I will report back tomorrow when I have picked them up

Oh ok,
Are you able to disconnect the bed from the bearing and manually move each bearing in turn up the shaft ? I'm wondering if you have a slight deformation on 1 shaft causes the stiction, there may be a small area that appears slight more polished due to the rubbing.

I will when I replace the bearings

But I don't think any things wrong with the rods since I can reproduce the issue at any height by manually moving the plate.

Meduza wrote:If you just received them from 3DVerkstan i do think that we actually ship Misumi bearings nowadays. (but i am not in charge of spare parts, IRobertI knows this better)

You are correct sir...I received genuine Misumi bearings today

How much do they charge for a set for the UM2?

Don't know...these were replacements for faulty bearings shipped with my UMO+ kit.

These are the ones that they sent.

yes, those are the ones you need!
did this a year ago on my UM2go and Umo

Yeah peggyb we did a nice debugging of UM crappy bearings quality

How difficult is it to replace these bearings? I wonder if I should replace mine but I am afraid that I might end up with a worse printer than before because I have to take it fully apart and can't get it together properly anymore...