Re: Grounded Experimental Delta Printer
Is it just me or does the Simpson setup look pretty good for milling? I don't know much about milling (or even really 3D printing), but the Simpson appears to be far stiffer and more robust than most...
View ArticleRe: Bed levelling on a Delta system, possible alternative?
I know on the printer I run now, the hot end manages to pick up a fair amount of charred/misplaced plastic. It cakes up on the hot end over time. Sure, I could get out some sandpaper or the dremel and...
View ArticleRe: Bed levelling on a Delta system, possible alternative?
Yes, the possibility of muck and rubbish on the tip had crossed my mind, but I have to admit I was thinking more along the lines of initial set up and calibration than ongoing checking, so the chances...
View ArticleRe: Bed levelling on a Delta system, possible alternative?
Ok, you want to use brass nozzle and some metal foil on the glass bed as a switch. I do not have idea how it would work. I think some way to suck air from below the foil (so that it precisely sticks...
View ArticleRe: Grounded Experimental Delta Printer
I'm not sure that Simpson is stiff enough for milling. Generally, mills use threaded rod to guarantee that they can exert a lot of pressure, and the toolhead is mounted to a huge lump of iron to...
View ArticleRe: Bed levelling on a Delta system, possible alternative?
That's just the sort of feedback I was looking for, and will hopefully make my task a lot easier. The printer I am going for iniially, and can modify once I have one, is the Delta Pi , which is still...
View ArticleRe: Grounded Experimental Delta Printer
I certainly wouldn't disagree with using metal arms for a milling simpson. I don't see why I'd want to replace the strings, though. 1/8th" dia. braided Spectra speargun line is 1050lb test, and...
View ArticleRe: Grounded Experimental Delta Printer
I was thinking more in terms of the drive pulley spinning if there was too much resistance. That's the problem that a rack-and-worm drive would fix.
View ArticleRe: Grounded Experimental Delta Printer
@terribleperson: I hope that we can adapt this to do milling operations. Annirak is correct that there would be many design consideration that have to be addressed. I think if I was asked to make this...
View ArticleRe: Bed levelling on a Delta system, possible alternative?
Irish_Steve Wrote: ------------------------------------------------------- > if the switch is a removable device, (which I hadn't > completely recognised) then that may not be so > much of an...
View ArticleRe: Bed levelling on a Delta system, possible alternative?
It will sound strange, I am actually looking forward to this build. I can't go for laser cut frames, but I have enough equipment here to be able to make them up accurately, which is the main thing,...
View ArticleRe: Grounded Experimental Delta Printer
About metal, until we have big simpson to play with, maybe sandmold is what we can sidestep with current design: [youtu.be] If 3/6 arms Simpson can do accurate aluminum milling, I think it is enough...
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Re: Grounded Experimental Delta Printer
@terribleperson: I forgot to address your question about the ability to print longer arms. I have stretched and skewed the geometry of Simpson in many different ways to see if the ability to print...
View ArticleRe: Grounded Experimental Delta Printer
@nicholas.seward: That's pretty much I was hoping for. I mean, obviously it's possible to tweak something as unclearly defined as the Simpson design until it can't macrocreate, but I was hoping that...
View ArticleRe: Grounded Experimental Delta Printer
@terribleperson I think we should begin with smaller one, find a suitable design for first generations. We only need a few generations for 3:5 Simpson to reach 1 meter arm length. To give rough idea...
View ArticleRe: idea: forklift arms for delta arms?
Interesting idea. I also think we can use 4 crawler cranes / construction cranes like this : [www.bnpeters.com] and at the center platform take one robot arm from this : [gigaom.com] It is complicated...
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Re: Grounded Experimental Delta Printer
22 Simpson print beds. 3/8" water jet cut basalt. (For those mathematical nerds out there, this is a constant width shape.) The macrocreation factor will be limited to 50% with this print bed.
View ArticleRe: Grounded Experimental Delta Printer
@nicholas.seward: A macrocreation ratio of 1.1 is absolutely astounding. I was expecting something on the order of 20% larger each cycle, but more than doubling the length of the arms makes it a whole...
View ArticleRe: Grounded Experimental Delta Printer
@terribleperson: The reuleaux triangle matches the usable area. For production I am putting a circular heating pad under the plate so a reuleaux triangle is a good way to fit a circle between 3...
View ArticleRe: Grounded Experimental Delta Printer
It occurs to me (as I'm sure it has to all of you) that there's no way it's going to get past even a meter before we start encountering structural issues. Plastic does not scale up all that well....
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