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Ultimaker with hiwin linear rails

Posted by Vigilant 
Ultimaker with hiwin linear rails
October 31, 2017 03:15AM
This has got me curious.

Lets assume an ultimaker like gantry movement (quadrap) is replaced with linear rail and powered by single motor with each axis driven by an 5 or 8mm rod connected with a belt.
What would be the pros and cons of this setup compared to the traditional corexy? other than the fact that I need 6 linear rails to replicate ultimaker's setup?

I'm thinking it will be a lot more balanced and having less dynamic stretching of the belt issues as I have two pair of belts driving one axis and a shorter path.
Re: Ultimaker with hiwin linear rails
October 31, 2017 03:55AM
Doubling the number of linear guides over coreXY is a lot of expense to go to (if you use quality parts- real HiWin linear guides, not cheapo knock-offs) to shorten the belts a little. If you're really worried about belts stretching, use wider belt. Building for 9mm belt costs only a little more than building for 6 mm belt.


Son of MegaMax 3D printer: [www.instructables.com]
Ultra MegaMax Dominator 3D printer: [drmrehorst.blogspot.com]
Re: Ultimaker with hiwin linear rails
October 31, 2017 07:39AM
Quality linear guides are a waste of money for such machine of regular size. It is an absurdity if they are mounted on crappy flexible frames like the majority I see. Funny but it seems to work because the flexible frame compensate for the poor alignment ! The cheap chinese ones will give better results than the cheap round rods even if they are mounted as badly. BUT, a good design well made using round rods will be lighter, better and cheaper.
There are far more issues than the belt stretch. Most of the time it is the various mounts that flex due to poor design like puley on a bolt attached at one end to a plastic part.
I like the Ultimaker design because it also leads to simplicity, the shafts are used as guides. I am inclined to choose this approach although the CoreXY is fine to.

Edited 2 time(s). Last edit at 10/31/2017 07:44AM by MKSA.

"You failed to maintain your weapon, son" (HARRY BROWN )
Re: Ultimaker with hiwin linear rails
October 31, 2017 10:21AM
For anyone looking for linear guides that are cheaper than genuine Hwin but better than the cheaper Chinese ones, I recommend the 440C stainless steel linear guides from Robotdigg. I haven't built a CoreXY machine yet, but I use them on my precision delta printer. They worked very well as they arrived, without me having to do any work on them.


Delta printer calibration calculator, mini IR Z probe, and colour touch screen control panel: [escher3d.com]

Large delta printer, and other 3D printer blog postings: [miscsolutions.wordpress.com]

Disclosure: I have a financial interest in sales of the Panel Due, Mini IR height sensor, and Duet WiFi/Duet Ethernet [www.duet3d.com].
Re: Ultimaker with hiwin linear rails
October 31, 2017 04:05PM
Not exactly what you described, but it has linear rails

Re: Ultimaker with hiwin linear rails
October 31, 2017 04:22PM
The belt visible at the back of the picture is nowhere near parallel to the round guide rail.


Son of MegaMax 3D printer: [www.instructables.com]
Ultra MegaMax Dominator 3D printer: [drmrehorst.blogspot.com]
Re: Ultimaker with hiwin linear rails
November 02, 2017 04:36AM
cool,

I'm surprise nobody has ever tried all linear rail ultimaker before.

Makes me want to try.
Re: Ultimaker with hiwin linear rails
November 02, 2017 06:54AM
Quote
Vigilant
cool,

I'm surprise nobody has ever tried all linear rail ultimaker before.

Makes me want to try.
May be because professionals know it brings nothing for this kind of machine.
Just the picture above shows it. The whole set up must weight like a dead donkey and brings nothing. All the other guides are round shafts, no ?


"You failed to maintain your weapon, son" (HARRY BROWN )
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