Linear stepper motors March 10, 2018 02:25PM |
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Re: Linear stepper motors March 10, 2018 05:31PM |
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Re: Linear stepper motors March 10, 2018 05:42PM |
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VDX
... look at the images in this 11 years old thread - [forums.reprap.org]
Especially on the images of the Brother type-wheel printer with the same "toothed steel barn" for positioning the print head.
Could give you some more ideas
Re: Linear stepper motors March 10, 2018 06:32PM |
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Re: Linear stepper motors March 10, 2018 11:17PM |
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Re: Linear stepper motors March 10, 2018 11:30PM |
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Re: Linear stepper motors March 11, 2018 03:32AM |
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Re: Linear stepper motors March 11, 2018 05:26AM |
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Re: Linear stepper motors March 11, 2018 07:34AM |
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Re: Linear stepper motors March 11, 2018 12:55PM |
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Re: Linear stepper motors March 11, 2018 10:03PM |
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Re: Linear stepper motors March 12, 2018 07:19AM |
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klcjr89
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MKSA
One important thing, it has to be soft iron and tool steel is not suitable and very hard to machine !
O1 is easy to work with since it comes unhardened (annealed) with high speed steel tooling. It only becomes much hard after you oil harden it.
Re: Linear stepper motors March 12, 2018 07:33AM |
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Re: Linear stepper motors March 12, 2018 08:29AM |
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Re: Linear stepper motors March 12, 2018 12:37PM |
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Re: Linear stepper motors March 12, 2018 12:53PM |
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Re: Linear stepper motors March 12, 2018 01:03PM |
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691175002
You are primarily concerned with magnetic permeability, which is why soft iron or electrical steels are often used. [en.wikipedia.org]
In my limited experience its nearly impossible to buy the fancy stuff, so most hobbyists default to durabar or the usual steels.
Modifying a linear rail is a very interesting idea. I think you might have to stay away from the MG series of rails though, as they are stainless. The harder grades of stainless might hold a magnet but permeability is so low that stepper force will be very limited.
Re: Linear stepper motors March 12, 2018 04:05PM |
Registered: 11 years ago Posts: 335 |
Quote
klcjr89
All the chiwin clones I've had in MGN series are definitely steel and not stainless. Only the Hiwin's are stainless perhaps?
Re: Linear stepper motors March 12, 2018 04:11PM |
Registered: 6 years ago Posts: 207 |
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691175002
The Hiwins are stainless, I'm not sure about the clones: [motioncontrolsystems.hiwin.com]
Maybe do a test run with Chinese rail; but if you are going to go through the trouble of cutting grooves I feel like you might as well use high quality rail. Misumi offers their MGN equivalent in both carbon and stainless versions. You will probably have to modify the grease seals on the blocks or they will get caught in the grooves.
Re: Linear stepper motors March 14, 2018 03:46PM |
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Re: Linear stepper motors March 14, 2018 06:53PM |
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Re: Linear stepper motors March 14, 2018 11:04PM |
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Re: Linear stepper motors March 15, 2018 04:18PM |
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Re: Linear stepper motors March 15, 2018 05:59PM |
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Re: Linear stepper motors March 15, 2018 06:08PM |
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Quote
691175002
The most difficult part of the project will likely be finding appropriate rail and cutting grooves in it. I think you might end up needing one of the back-mounting variations (ex: [www.automation-overstock.com] ) because hole counterbores in standard rail might cause issues.
Re: Linear stepper motors March 15, 2018 06:57PM |
Registered: 10 years ago Posts: 14,672 |
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klcjr89
How many Newtons of force are required for 3D printing? The one I tore apart was 8.9 Newtons.
Re: Linear stepper motors March 15, 2018 06:59PM |
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dc42
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klcjr89
How many Newtons of force are required for 3D printing? The one I tore apart was 8.9 Newtons.
That's quote low. We typically use stepper motor with 25 to 50Ncm of torque at rated current. If you put a 20 tooth GT2 pulley on one, the effective pulley radius is about 6.4mm, which means the holding force on the belt at rated current is about 40N to 80N.
Re: Linear stepper motors March 15, 2018 07:19PM |
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Re: Linear stepper motors March 16, 2018 03:40AM |
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Re: Linear stepper motors March 16, 2018 03:52AM |
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