wanton flare
Just starting to put together my first Voron
While building the Z drive, I noticed the bearings are loose in their housings
Is this normal/desired?
I only noticed, because when I spin the gear, it wobbles. Turns out the 5mm shafts from AliExpress come pre-bent…. Ordered some new drill rod to fix that.
I’m assuming if the shaft is straight, the bearings won’t move once under belt tension?
analog pewter
Looks like the bearing itself is kind of also loose. Unless the was a result of wear from the bent shaft
wanton flare
This was on assembly, it hasn't been run on anything.
Might be a trick of the video, I don't see any play in the bearing. Just between the bearing and the housing
analog pewter
My bearing outer races definitely did not move at all and were very snug with the printed plastic.
Will the rod roll smoothly on a flat Surface?
wanton flare
Well, no, because it is a D rod. But if you spin the wheel, you can clearly see the wobble.
I'm sure the rod is bent. But I saw it because the play in the housing allows the bearing to shift with the wobble of the rod.
LIke I said, I am going to replace the rods. Just want to know if I have a bad housing print
analog pewter
For parts with two flat planar mating surfaces, you should sand the faces to get rid of top high spots.
wanton flare
That I did not do. I can
analog pewter
If your did not do that, your bearing will likely be a tad loose.
Yeah.
wanton flare
Perfect, thanks!
analog pewter
Sandpaper on flat glass or granite.
I did something like 30 circles per part with light pressure
wanton flare
I have an old glass bed here, that should work. What grit?
analog pewter
My formbot kit came with something that felt like somewhere between 220 and 500
wanton flare
Hopefully I have something in that range
analog pewter
You must wet sand btw or you will totally gum the paper
wanton flare
Hmm, still about the same amount of play. I did mess with my line widths a little for strength, wonder if that thew off my prints too much
analog pewter
What's your outer wall line width set to?
wanton flare
It was set to 105%, or .42
analog pewter
reasonable.
wanton flare
It's easy enough to print another block at exactly .4 across the board, I am going to try that. Probably wouldn't hurt to check my shrinkage again either.
novel estuary
It's easy enough to print another block at exactly .4 across the board, I am goi...
If your using shrinkage that’s probably your problem voron parts have been designed around shrinkage
wanton flare
Oh well that's good to know... Even though different brands will have different shrinkage??
I'm using Polylite ASA with 99.4 on the XY, and 99.5 on the Z
novel estuary
Yes at the point it should very minimal abs/asa if I remember correctly is 0.5%, I did all my parts on with polymaker asa and did no shrinkage parts were pretty snug fit for a ender 3
wanton flare
Well I'll try a print without shrinkage then
wicked rapids
Well I'll try a print without shrinkage then
voron parts have shrinkage built in
wanton flare
Success! Reprinted with no shrinkage, hard set all line widths to .4, and the bearing no longer has any play. Thanks for all the help!
analog pewter
Success! Reprinted with no shrinkage, hard set all line widths to .4, and the b...
Is the d shaft still bent though? The pulleys still wobble yeah?
wanton flare
The housing seems to straighten the rod well enough through clamping force, but the pulley does bind lightly at one point in its rotation. I will still be replacing the shaft.