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

Luke Kenneth Casson Leighton lkcl at lkcl.net
Thu May 25 06:32:44 BST 2017

crowd-funded eco-conscious hardware: https://www.crowdsupply.com/eoma68

On Thu, May 25, 2017 at 5:46 AM, Bluey <bluey at smallfootprint.info> wrote:
>> On 25 May 2017, at 1:12 PM, Luke Kenneth Casson Leighton <lkcl at lkcl.net> wrote:
>> https://www.youtube.com/watch?v=3IGQ_8K3tGI
>> this is a quick video of the horribly cheap and cheerful taobao $150
>> plus $40 shipping 3d printer making a HELL of a racket, successfully
>> PRINTING at 200 mm / sec.  acceleration settings have been turned up
>> to... enormous: 4000 mm / sec^2 for X and Y, and 9000 mm / sec^2 for
>> the extruder.
> Very cool!

 very very funny, too

> Would adding in a 2nd print head, in order to print two pieces concurrently, be a feasible option?

ah. good suggestion.... except it's quite a lot of work (near-total
redesign), and the x-rods would need to be up-rated to at least 10mm
in order to cope with the increased span.

 8mm @ 300mm long is *barely* the acceptable span for steel rods.  a
2nd printhead would not only increase weight but also would require a
longer span

 that in turn means going to 10mm rods

 that in turn means going to LM10UU bearings

 that in turn means that the printhead would no longer fit into the
hole down the centre, in addition to that the printhead would need to
be LOWERED because the LM10UU bearings are much wider than LM8UU

 the increased length and width of LM10UU bearings increasing the size
of the carriage would in turn also mean that the carriage would no
longer fit between the uprights

 which in turn means that the uprights would need to be redesigned

 and also the entire printer widened

 so it is a completely unanticipated cascade of ongoing consequences
meaning that a whopping 50% of the original printer needs to be
replaced or redesigned.

 overall it might actually be quicker - and cheaper - just to get...
two unmodified printers.



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