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

[Bluey]

> On 25 May 2017, at 3:32 PM, Luke Kenneth Casson Leighton <lkcl at lkcl.net> wrote:
> 
> ---
> 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.
> ...

Ah, yeah.  I was actually thinking of a bit of a bastardised printer designed just for printing the small pieces.  That way, the print heads would only move left–right by the width of the largest small piece and the frame et al. could remain unchanged.  (An even more crazy version would be to have four fixed printer heads mounted above a table that can move in the X and Y direction.  Obviously the Z-axis mechanism would need to be rated for the higher weight resulting from the extra printer heads.)

The long pieces would still be printed on a standard one-head printer.

- Bluey

P.S. Is there any reason that PLA can’t be used in place of resin in the cast moulds?  That way you get the speed of casting with the strength of PLA.