[Arm-netbook] $150 taobao knock-off 3d printer doing 200mm/sec

[mike.valk at gmail.com]

2017-05-29 17:11 GMT+02:00 Luke Kenneth Casson Leighton <lkcl at lkcl.net>:

> On Mon, May 29, 2017 at 11:39 AM, Luke Kenneth Casson Leighton
> <lkcl at lkcl.net> wrote:
> > On Mon, May 29, 2017 at 9:54 AM, mike.valk at gmail.com
> > <mike.valk at gmail.com> wrote:
> >
> >> I might have missed it but: Do you need/want other people running the
> >> finalized modification of this printer?
>
>  that and also i would like to do an experimental design as well:
>  http://forums.reprap.org/read.php?177,767087,770804#msg-770804
>
>  the idea is to have a double pulley arrangement which will provide
> balanced forces acting as far apart as possible, but also with a 4x
> multiplier on the force thanks to the twin pulleys.
>
>  also i plan to use double rods rather than single because double rods
> will turn any "twisting" (rotation) of the rods into a side-loading
> force against the linear rails.  the further apart the rods are the
> more effective the leverage preventing "twisting", but they can't be
> too far apart else the carriage has to be too big, and also the rods
> have to be much longer...
>
> ... i was thinking of starting with a distance of 70mm between rod
> centres and seeing how that goes.  should mean i can use 300mm rods.
>

I remembered an post from Hackaday.
http://www.doublejumpelectric.com/projects/core_xy/2014-07-15-core_xy/



>
> l.
>
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