"Unnamed" plotter XY mechanism revisited May 10, 2016 07:01AM |
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Re: "Unnamed" plotter XY mechanism revisited May 10, 2016 08:18AM |
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Re: "Unnamed" plotter XY mechanism revisited May 10, 2016 08:46AM |
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VDX
... look at the images here - I've built several of this type for plotting or laser-cutting with the motors fixed on one side:
[forums.reprap.org]
Re: "Unnamed" plotter XY mechanism revisited May 10, 2016 11:11AM |
Admin Registered: 16 years ago Posts: 13,888 |
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lkcl
... nice to see it was patented... and has expired.
Re: "Unnamed" plotter XY mechanism revisited May 10, 2016 11:36AM |
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Re: "Unnamed" plotter XY mechanism revisited May 19, 2016 12:56PM |
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Re: "Unnamed" plotter XY mechanism revisited May 21, 2016 07:10AM |
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Re: "Unnamed" plotter XY mechanism revisited May 23, 2016 12:19PM |
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Re: "Unnamed" plotter XY mechanism revisited May 23, 2016 02:35PM |
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misan
It seems an interesting proposal. Belts can work in parallel planes, no belt crossings. You just need a fair amount of idlers :-)
Re: "Unnamed" plotter XY mechanism revisited May 25, 2016 07:46AM |
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Re: "Unnamed" plotter XY mechanism revisited May 29, 2016 06:56PM |
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Re: "Unnamed" plotter XY mechanism revisited May 30, 2016 04:46AM |
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JamesK
Hmm, I like that the X and Y axis have equal moving mass, and the simplicity of a dedicated motor per axis is reassuring. That cross arrangement always looks like it's begging for a quad hotend setup
Re: "Unnamed" plotter XY mechanism revisited May 30, 2016 07:05AM |
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Re: "Unnamed" plotter XY mechanism revisited May 30, 2016 08:21AM |
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JamesK
I missed the fact that you were planning on using square section tubes.
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Is the choice over round rods primarily for weight saving or is there something else? It doesn't look like you need the non-rotation around the long axis (there must be a better way of saying that - axial non-symmetry?) for anything.
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V rollers are cool, but the simplicity, durability and cost effectiveness of smooth rods and ball bearings are hard to beat.
Re: "Unnamed" plotter XY mechanism revisited May 30, 2016 08:30AM |
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Re: "Unnamed" plotter XY mechanism revisited May 30, 2016 02:20PM |
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lkcl
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Is the choice over round rods primarily for weight saving or is there something else? It doesn't look like you need the non-rotation around the long axis (there must be a better way of saying that - axial non-symmetry?) for anything.
i know what you mean. axial rotation is not prevented by square rods. if there is any it would actually damage the v-rollers as the axial rotation would torque the v-rollers sideways.
Re: "Unnamed" plotter XY mechanism revisited July 07, 2016 11:50AM |
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Re: "Unnamed" plotter XY mechanism revisited July 07, 2016 11:53AM |
Registered: 8 years ago Posts: 776 |
i've been very busy with a crowd-funding campaign for the _real_ reason why i started this 3D printer in the first place: [crowdsupply.com]Quote
jpconstantineau
Hi
Any progress on the build?
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I am curious on how well this mechanism works in real-life and if there are any unforeseen gotchas...
I really like the gearing ratio the pulley system provides. I assume that in addition to the better resolution, the torque requirements on the stepper will be halved as well. Is this correct?
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I am designing my own small printer based on the 28BYJ-48 12V "Toy" stepper motors (more as a fun challenge) and these mechanical advantages make this mechanism quite attractive for such a stepper.
Re: "Unnamed" plotter XY mechanism revisited July 08, 2016 02:18AM |
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Re: "Unnamed" plotter XY mechanism revisited July 09, 2016 12:33PM |
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Re: "Unnamed" plotter XY mechanism revisited July 12, 2016 02:25PM |
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Re: "Unnamed" plotter XY mechanism revisited July 12, 2016 03:50PM |
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Re: "Unnamed" plotter XY mechanism revisited July 12, 2016 10:35PM |
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Re: "Unnamed" plotter XY mechanism revisited July 12, 2016 11:28PM |
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