What is proper orientation of of X and Y axis bearings?
Hi.
Each bearing has 4 tracks. How should those be aligned? Should the bearings be oriented so that the force that is applied from top is going directly through 1 track or rotated 45 degrees so it goes "partially" via 2 tracks of balls?
RE: What is proper orientation of of X and Y axis bearings?
The manual contains images that show correct alignment for each bearing.
RE: What is proper orientation of of X and Y axis bearings?
I think it is shown in the manual for the y axis but not for the x axis.
They run on two rows. So like your 45 degrees.
RE: What is proper orientation of of X and Y axis bearings?
The manual contains images that show correct alignment for each bearing.
I didn't find anyting for X axis
RE: What is proper orientation of of X and Y axis bearings?
Section 3 - Step 4
https://help.prusa3d.com/en/guide/3-x-axis-assembly_167854
Also best to build using the online manual and read all of the user comments for tips and gotchas.
RE: What is proper orientation of of X and Y axis bearings?
Also, do yourself a HUGE favour and do the following. The bearings do not come greased. They only have a corrosion inhibiting packing oil.
Order a bottle of 100% (or as close to) isopropyl alcohol. You need it anyway and 5L is cheap.
Super Lube 21030 (the part number is important!) Not sure where you're located, but you should be able to find a local supplier.
https://www.mektronics.com.au/super-lube-multi-purpose-grease-3oz-tube.html
Then download and print these these:
Linear Bearing Grease Cap
https://www.thingiverse.com/thing:1128781
Linear Bearing Grease Cap Lid
https://www.thingiverse.com/thing:1134114
If you have access to another printer, while your waiting for the alcohol and grease to arrive, do all the printing. Otherwise, you get to pull the printer apart. Use PETG, a 0.4 nozzle and 0.2mm layer height and 0.42 extrusion width for all extrusions. This makes the threads and openings accurate.
Pull all of your linear bearings out. Put them in an airtight container with enough isopropyl alcohol to cover them by about 5mm. Give them a gentle tilt around, let them sit for 5-10mins and repeat tilting them around. Do this for 40-60mins to get rid of all the OEM oil.
Pull them out and shake out all the excess alcholol and then let them stand on their end on a couple of sheets of paper towel for about 30-60mins.
Get a bunch of paper towel sheets torn off in preparation as your fingers are going to get messy and it's a pain to get the towel after you have grease everywhere. 🙂
Get the grease cap you printed, put it on the tube, line the slots up with the balls in the bearings, slide the bearing on and then squeeze the tube till some grease starts to come out the top of the bearing. Do this to all the bearings.
Slide the bearing onto one of the smooth rods one at a time and slide it up and down about 20-30 times. You can wipe of the excess grease.
Repack the bearings again and repeat - this is important as I found out the hard way and hard to tear down my printer a second time to repack them. It's needed to work the grease through all of the balls.
Put your printer back together, run a full XYZ, belt and first layer calibration; knock the top off a cold one and enjoy the beautiful silence of properly LUBRICATED bearings! 🙂 👍
RE: What is proper orientation of of X and Y axis bearings?
Section 3 - Step 4
https://help.prusa3d.com/en/guide/3-x-axis-assembly_167854
Also best to build using the online manual and read all of the user comments for tips and gotchas.
I literally can't find it. There is shown orientation for Z axis. But I can't find orientation of bearing on X axis that holds the extruder.
RE: What is proper orientation of of X and Y axis bearings?
I know that I need to lube them. I also know that Prusa's instruction are just wrong about this precum of the lube they ship bearings whith. This is why I wanted to know the proper orientation of bearing on each axis.
RE: What is proper orientation of of X and Y axis bearings?
Please read "Step 4 X-axis: inserting linear bearings"
Bear MK3 with Bondtech extruder
RE: What is proper orientation of of X and Y axis bearings?
OK.
You want to get the rod with 2 bearings so one has the rows at 0, 90, 180 and 270 degrees (or 12, 3, 6 and 9 o'clock) and the other offset by 45 degrees. You will need to put a pen mark on the outside of one of the bearings so you know where one of the rows is.
On the other you want it at 0, 90, 180 and 270.
RE: What is proper orientation of of X and Y axis bearings?
Please read "Step 4 X-axis: inserting linear bearings"
I see where @hooch is getting caught up. It's steps 7 & 8. The instructions here kinda suck.