--- crowd-funded eco-conscious hardware: https://www.crowdsupply.com/eoma68
On Thu, May 25, 2017 at 5:46 AM, Bluey bluey@smallfootprint.info wrote:
On 25 May 2017, at 1:12 PM, Luke Kenneth Casson Leighton lkcl@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.
:)
l.