Should Y bearings grind on the rods a little?
I've assembled the Mk2-S last week, been getting great prints so far. I've noticed that fast Y movements are becoming increasingly louder and it's been on the verge of bearable today. I've searched for solutions and I've ordered new igus bearings and I'll also use the vibration dampers that have been posted here.
Anyway, while looking if everything was tight, I've noticed that the Y bearings appear to be grinding down on the rods.
As you can see, there's a shiny streak on the top (on both rods). The one on the top is most pronounced, but I can see a slightly less shiny streak on the bottom as well. Is this normal? Did I tighten the bearings too much?
Re: Should Y bearings grind on the rods a little?
Mine does the same. Replaced the bearings yesterday (made sure the new ones dont run in the flat part. tightened them just enough to barely hold them in place) but it did not reduce the noise much.
I also limited max travel speed to 100 in the slic3r and set max Y feedrate to 100 in the firmware. This reduced the noise more than replacing the bearings did.
Re: Should Y bearings grind on the rods a little?
Mine does the same. Replaced the bearings yesterday (made sure the new ones dont run in the flat part. tightened them just enough to barely hold them in place) but it did not reduce the noise much.
I also limited max travel speed to 100 in the slic3r and set max Y feedrate to 100 in the firmware. This reduced the noise more than replacing the bearings did.
Yeah, I've ordered better bearings as well.
As far as the noise is concerned, I've printed these dampers and the difference is unbelievable. The printer is at least 50% quieter now, probably more. I can barely hear it in the other room with the doors opened. Printed with 50% infill to make them hold the weight.
Re: Should Y bearings grind on the rods a little?
Printed those feet. That helped a lot.
I used to be able to hear it printing even when the printer was in the garage, but with these feet I hear nothing from inside the house, which is nice.
My bearing holders on the y axis are now not tight at all, just tight enough to hold them in place so I can't rotate the bearings by hand.
Even with very loosely mounted new china/ebay bearings it's already ground a flat spot on the rods, so I guess that's quite normal. Maybe the rods aren't very hard steel.