Noisy bearing
Started doing this today... Any suggestions?
- Gab
Re: Noisy bearing
Souds like bearing balls are rubbing/grinding smooth rods. You should solve this a.s.a.p. otherwise you'll get bad scratches on smooth rod.
Replace the bearing or at least replace its lubrication = get the bearing off the rod and put grease directly on the balls (use wooden toothpick to put the grease deep into bearing). But I recommend to get new bearing, current one is most likely too damaged already. Replace all three bearings for sure.
Re: Noisy bearing
Are they supposed to be replaced every two weeks, or I got unlucky, or is there some underlying problem I should attend to?
- Gab
Re: Noisy bearing
To be honest, linear bearing given in MK2 kit definitely are not top quality. Moreover, as far as I know, assembly manual does not say anything about lubrication. I strongly recommend to replace storage oil (which comes on delivered bearings) with standard machinery grease, it makes the bearings last longer. Also keep smooth rods clean. Any dust and debris contamination causes higher wear.
Good quality bearings should last years (with proper treatment).
Re: Noisy bearing
Yeah the bearing quality is not like it was.
My early Mk1 is still running on original X/Z bearings (I bib replace the Y bearings). My Mk2 bearings do need replacement.
I clean the bearings with Ethanol before installing and run them dry because of the dust.
Peter
Please note: I do not have any affiliation with Prusa Research. Any advices given are offered in good faith. It is your responsibility to ensure that by following my advice you do not suffer or cause injury, damage…
Re: Noisy bearing
What is the best type of grease to use on these after cleaning the oil out?
Re: Noisy bearing
Light machine oil (sewing machine oil) seems to be used by some.
Peter
Please note: I do not have any affiliation with Prusa Research. Any advices given are offered in good faith. It is your responsibility to ensure that by following my advice you do not suffer or cause injury, damage…
Re: Noisy bearing
It's weird because they don't make noise if I use the Move Y in settings to move the bed with the knob, and today they made noise when I started a print but then stopped making noise at some point... so maybe it's just dirt? (The printer is in the house so not a super dirty place.)
What's the best place to order spare bearings and how to tell good from bad apart?
- Gab
Re: Noisy bearing
First, try to re-align the bearings. When you look inside the bearing, there are 4 rows of balls. The bearings should be oriented so ball rows are placed on top/bottom/left/right, not diagonally.
If the bearings were oriented right, try to rotate them by 180 degrees (upside down, bottom row of balls go up).
Also check perfect geometry of Y axis rods. The y-carriage should sit steady on bearings even when you remove zip ties and no load is applied. Distance between y-rods should be exactly 170mm (center-to-center) in all range of movement.