Can McWire bootstrap a mendel?
Posted by anton
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Re: Can McWire bootstrap a mendel? February 22, 2010 12:41PM |
The answer really is "Yes, Theoretically." As near as I've been able to tell, nobody has actually done it. I feel like I'm in a race with a few different people to actually accomplish this feat. 
If we do find that Seedling really is incapable of printing a Mendel simply as a matter of time economy, I think it's time to start designing a second generation Seedling. I've been writing down some ideas, before we jump into it though, I've wanted to see my McWire in action. (I'm probably a week or two away still)
If we do find that Seedling really is incapable of printing a Mendel simply as a matter of time economy, I think it's time to start designing a second generation Seedling. I've been writing down some ideas, before we jump into it though, I've wanted to see my McWire in action. (I'm probably a week or two away still)
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Re: Can McWire bootstrap a mendel? February 22, 2010 03:32PM |
bobt Wrote:
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>
> Forrest how long do you think that it would take
> to make a rack that is 18" long even in segments
> and a second rack 9" long. Plus 2 pinion gears
> using the threaded rod system.
>
> Remember to bootstrap the bootstrap as many time
> as you need to get something to work.
>
>
> Bob Teeter
On my Rapman running at 16 mm/sec it takes about 120-180 minutes to print 4 pinion gears. I do them in groups because when you try to print a single one with Skeinforge it either gets wrapped up in a cocoon of ooze threads if you use the orbit cooling scheme. If you don't orbit the time the extruder head spends over the gear makes a melted mess of it. Printing multiples gets you away from orbiting if you make enough of 'em. They are much easier to clean and prepare for use that way.
I'd probably do three, six inch racks at a time since if I run them diagonally you tend to lose a bit of definition and can only print one at a time that way.
I haven't run three at a time of that length, only two, but I'd estimate that it would take about 2 hours for three.
Keep in mind that I'm using a 0.3 mm extruder nozzle, not the usual 0.5 mm, so it takes me longer to do things. I haven't tried to do this with 0.5. You may lose too much definition with 0.5.
You could easily do that all in a couple of 8 hour shift on my machine. McWires are typically very slow by comparison which would magnify that time and create additional problems for you with the hot extruder head spending too much time over the print surfaces and you'd have to orbit, most likely. Could take you several days on a McWire. I wouldn't try it, personally.
Edited 3 time(s). Last edit at 02/22/2010 03:35PM by Forrest Higgs.
-------------------------------------------------------
Hell, there are no rules here - we're trying to accomplish something.
Opportunity is missed by most people because it is dressed in overalls and looks like work.
Thomas A. Edison
-------------------------------------------------------
>
> Forrest how long do you think that it would take
> to make a rack that is 18" long even in segments
> and a second rack 9" long. Plus 2 pinion gears
> using the threaded rod system.
>
> Remember to bootstrap the bootstrap as many time
> as you need to get something to work.
>
>
> Bob Teeter
On my Rapman running at 16 mm/sec it takes about 120-180 minutes to print 4 pinion gears. I do them in groups because when you try to print a single one with Skeinforge it either gets wrapped up in a cocoon of ooze threads if you use the orbit cooling scheme. If you don't orbit the time the extruder head spends over the gear makes a melted mess of it. Printing multiples gets you away from orbiting if you make enough of 'em. They are much easier to clean and prepare for use that way.
I'd probably do three, six inch racks at a time since if I run them diagonally you tend to lose a bit of definition and can only print one at a time that way.
I haven't run three at a time of that length, only two, but I'd estimate that it would take about 2 hours for three.
Keep in mind that I'm using a 0.3 mm extruder nozzle, not the usual 0.5 mm, so it takes me longer to do things. I haven't tried to do this with 0.5. You may lose too much definition with 0.5.
You could easily do that all in a couple of 8 hour shift on my machine. McWires are typically very slow by comparison which would magnify that time and create additional problems for you with the hot extruder head spending too much time over the print surfaces and you'd have to orbit, most likely. Could take you several days on a McWire. I wouldn't try it, personally.
Edited 3 time(s). Last edit at 02/22/2010 03:35PM by Forrest Higgs.
-------------------------------------------------------
Hell, there are no rules here - we're trying to accomplish something.
Opportunity is missed by most people because it is dressed in overalls and looks like work.
Thomas A. Edison
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