Reddit reviews OTRMAX 4-Piece 8mm Longer Linear Motion Ball Bearing Double Side Rubber Seal Linear Bushing CNC Part LM8LUU
We found 5 Reddit comments about OTRMAX 4-Piece 8mm Longer Linear Motion Ball Bearing Double Side Rubber Seal Linear Bushing CNC Part LM8LUU. Here are the top ones, ranked by their Reddit score.
Great for linear motion on 3D Printer, CNC, and other applicationsMain Material : Carbon Steel, PlasticSize: 8 x 15 x 45mmQuantity: 4pcs LM8LUU Linear Ball BearingEach product surfaces are coated with a rust preventive oil before shipping
Pretty generic Not super high quality, but a big improvement over the bearings my printer came with. They were rough.
Oh thank god Reddit is back up! Okay, I think a good bet might be these: https://www.amazon.com/OTRMAX-4-Piece-Longer-Bearing-Bushing/dp/B01MXTYSVL/ref=sr_1_2?s=industrial&ie=UTF8&qid=1498657770&sr=1-2&keywords=lm8luu as it is the correct size and has good reviews.
After doing quite of bit of reading, I went with these:
OTRMAX 4-Piece 8mm Longer Linear Motion Ball Bearing Double Side Rubber Seal Linear Bushing CNC Part LM8LUU https://www.amazon.com/dp/B01MXTYSVL/ref=cm_sw_r_cp_apa_5iPSBb8S68Y2Q
I'm pleased with them so far.
This picture is inland PLA printed at 220 C at various speeds - 60 mm/s on the left to 10 mm/s on the right.
Like most Wanhao i3 pluses, my y axis bearings started going, so I replaced them with these LM8LUUs. I got a lot of ringing. Tightening the belt didn't seem to help. Adjusting print speed and acceleration work, but only with extreme values - the printer was printing fine at 60 mm/s print speeds before the swap, and now I can only get rid of the ringing at 10 mm/s. Similar with acceleration values, originally printed at 1000 mm/s^2, and can get rid of ringing sub 200 (the picture is all 800 mm/s^2). Obviously this is not ideal. I'm out of ideas, but am wondering if this could be a problem with the bearings themselves at this point - that is, if I should replace the bearings again.
I've basically had this problem for about 2.5 years and have posted about it about 6 times, this was the first time anyone knew what it was.
Here's the changes/settings I've made:
EEPROM:
Cura 4.2.1:
Upgrades to the printer (apart from those already mentioned):
The rest of my settings tend to vary based on what I'm printing; and my retraction currently isn't dialed in.