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

[Luke Kenneth Casson Leighton]

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.

l.