Cheap and easy high performance self-made bushing alternative February 07, 2018 05:03AM |
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Re: Cheap and easy high performance self-made bushing alternative February 07, 2018 05:27AM |
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Re: Cheap and easy high performance self-made bushing alternative February 07, 2018 08:32AM |
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Re: Cheap and easy high performance self-made bushing alternative February 07, 2018 08:45AM |
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orbitalair
Hi,
Thanks for the tip !! I'll see if I can try it myself. I started with printed pla bushings, the trick here is to get the start 'sticktion' as low as possible, furniture polish helps. In my design its not heavily loaded (e3dv6 is light).
I now know why people dont like the linear roller bearings, they stick at the worst possible moment.
Re: Cheap and easy high performance self-made bushing alternative February 07, 2018 09:55AM |
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Re: Cheap and easy high performance self-made bushing alternative February 07, 2018 08:32PM |
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Re: Cheap and easy high performance self-made bushing alternative February 08, 2018 02:25AM |
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Re: Cheap and easy high performance self-made bushing alternative February 08, 2018 03:40AM |
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cwaa
I don't understand why people use rods and linear bearing/bushings when you can have wheels with bearings and a much smoother and simpler approach.
Re: Cheap and easy high performance self-made bushing alternative February 08, 2018 10:17AM |
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Re: Cheap and easy high performance self-made bushing alternative February 08, 2018 03:27PM |
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Re: Cheap and easy high performance self-made bushing alternative February 09, 2018 06:30AM |
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Re: Cheap and easy high performance self-made bushing alternative February 09, 2018 06:59AM |
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Re: Cheap and easy high performance self-made bushing alternative February 09, 2018 09:12PM |
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Re: Cheap and easy high performance self-made bushing alternative February 10, 2018 02:44AM |
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Trakyan
The igus ones are a bit finicky about their fit, they need a pretty specific pressfit to end up at their proper final tolerance. Another thing is they sell a lot of different grades. Their high grade (expensive) ones seem to work well, but the cheaper ones hobbyists are more likely to be buying seem to give people grief.
Re: Cheap and easy high performance self-made bushing alternative February 10, 2018 06:31AM |
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Re: Cheap and easy high performance self-made bushing alternative February 10, 2018 07:43AM |
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DjDemonD
I like the creativity and ingenuity of this approach. But my experience over now 4 machines is that so called chiwin rails which can be had for $15 a piece outperform all rod systems whatever bearings/bushings you use. What do you estimate are the costs of your system? I swapped rods for rails on my corexy and saw a noticeable jump in print quality.
Genuine Japanese or German rails must be even better. But when I can get a delta with Chinese rails to calibrate to a deviation of 4 microns I'm quite certain I'd see no improvement swapping high quality ones in, certainly wouldn't be good value. And they've been in there over 18 months and hundreds/thousands of hours printing. Wipe them over with 3in1 oil occasionally.
Re: Cheap and easy high performance self-made bushing alternative February 10, 2018 09:36AM |
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MKSA
So why these PTFE bushings work and not the Igus bushings (I am very happy with my own) or sintered bronze (fine too but messy because of the lubrication).
Re: Cheap and easy high performance self-made bushing alternative February 10, 2018 11:40AM |
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Re: Cheap and easy high performance self-made bushing alternative February 10, 2018 03:34PM |
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MKSA
How did you make sure all your rods were perfectly // ? If not perfectly // the PTFE bushings will adapt while the Igus will bind.
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MKSA
I can also see they are very short. Igus is then more likely to bind.
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MKSA
If thermal expansion has not been taken care of, here too, dimension change will lead to Igus binding while the PTFE will conform.
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MKSA
Note: Igus is not the only polymer, I use it because Igus is the only one offering it in filament so I can make my own design, not just a simple cylinder.
I have replaced all bearings (even most ball bearings) and lead screw nuts on my Prusa and even on other equipment. So far so good.
Re: Cheap and easy high performance self-made bushing alternative August 21, 2020 04:22PM |
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Re: Cheap and easy high performance self-made bushing alternative August 22, 2020 01:40AM |
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henkyprayoga
I'm pretty much like the idea. How is it going after 2 years?
Re: Cheap and easy high performance self-made bushing alternative August 22, 2020 03:12AM |
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Re: Cheap and easy high performance self-made bushing alternative August 22, 2020 04:25AM |
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henkyprayoga
Yeah, I saw that people try to make linear bearing using common PTFE tube used for bowden tubing. But I think that using PTFE tube which has the same ID as the shaft should be simpler. It's easy to get as well.
I read that people using IGUS bearing also require properly aligned shaft. So it share the common problem? Is it better to use Igus polymer bushing or print using their filament? What's the major benefits?
Re: Cheap and easy high performance self-made bushing alternative August 22, 2020 05:20AM |
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MKSA
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henkyprayoga
Yeah, I saw that people try to make linear bearing using common PTFE tube used for bowden tubing. But I think that using PTFE tube which has the same ID as the shaft should be simpler. It's easy to get as well.
I read that people using IGUS bearing also require properly aligned shaft. So it share the common problem? Is it better to use Igus polymer bushing or print using their filament? What's the major benefits?
It is NOT a problem ! The problem is people inability to build, learn, understand.
To make your own allows you to make all kind of bearings well fit for the job. Cheap, small, light and good !
It is cheaper than the crappy chinese bearings and far better in all count !
Of course you won't beat the quality of the real stuff from Bosch, Thomson ....
If you do proper bearings using plain PTFE tubing, the alignment requirement stays the same as IGUS ! Sloppy bearings with enough play will allow improper alignment ! PTFE ability to creep will help too.
Bearings using steel balls are "strong" enough to straighten the flexible misaligned hobby 3D printers frame (98% are built that way). They will just wear out, require lubrication, lead to funny movements producing strange artifacts and generate pages and pages of discussions, calls for help in various fora.
.