On Fri, 19 May 2017 01:42:52 +0100 Luke Kenneth Casson Leighton <[email protected]> wrote: > > On Fri, May 19, 2017 at 12:35 AM, Neil Jansen <[email protected]> > wrote: <snip> > now, neil, this is the kind of speed at which an arduino 2560 *cannot > cope*, and, also, where the design flaws inherent in RAMPS - using > prototyping Evaluation Boards (polulu-style drivers) - start to show > up. Could you be more specific? Why can't the arduino cope?
> david crocket (dc42) has specifically designed the duet series so that > you can consider exceeding PWM rates of 150 khz, which is what you > need if you want to sustain 500mm/sec for example (and do not want > problems to occur at speeds well below that). Link? > also i forgot to mention that i've been using the E3Dv6 "volcano" > which, when you use a 0.5 to 0.8mm nozzle can easily do flow rates of > something mad like.... 200c^3/min - particularly when combined with > the huge 40:1 gearing of the flex3drive which can *accurately* deliver > the kinds of torque needed. the volcano basically turns the heat > chamber round, so that the heat area is 20mm long instead of the usual > 10mm. Torque for what? Again, maybe a link would help us stay on the same page. > none of this stuff i knew about, the 18 months before i began > designing the laptop's parts. oh well. I researched 3D printers thoroughly before I bought mine. I even started asking questions at a forum, and I'm still not too certain if I got what I sought. According to this list, I did worse when looking for hacker boards. So, you are not alone. <snip> > welcome to the list neil. really good talking with you. > > l. Indeed. Sincerely, David _______________________________________________ arm-netbook mailing list [email protected] http://lists.phcomp.co.uk/mailman/listinfo/arm-netbook Send large attachments to [email protected]
