Re: Making a huge 3D Printer! January 22, 2014 01:02PM |
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Re: Making a huge 3D Printer! January 23, 2014 01:31PM |
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Re: Making a huge 3D Printer! January 23, 2014 03:27PM |
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Re: Making a huge 3D Printer! January 23, 2014 07:32PM |
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Re: Making a huge 3D Printer! January 23, 2014 08:43PM |
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Re: Making a huge 3D Printer! February 10, 2014 04:09PM |
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Re: Making a huge 3D Printer! February 10, 2014 04:16PM |
Registered: 10 years ago Posts: 118 |
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Rezer
There's one huge issue you didn't seem to address: weight. A build platform of nearly (over?) a meter squared is going to be massive, probably at least 20 times heavier than your typical reprap. How do you intend to get print speeds anywhere near what a small printer can do using the same nema 17 motors? You're probably looking at reliable axis acceleration orders of magnitude below what a prusa can manage, so even a prusa sized print will take far longer on the large machine vs the prusa. Being able to print larger things would be nice, of course, but your stated goal of filling the build platform with small objects and just letting it run over a weekend is much less efficient than just using several smaller printers, and more prone to failure as well.
Edit: I see you're actually going with a fixed bed, but my point remains. Moving the entire axis gantry style is no small matter, as any supports sturdy enough not to flex at that length will be fairly massive as well. I'm not saying it can't be done, but you're going to need much larger motors to have any hope at all of achieving acceptable print speeds.
Re: Making a huge 3D Printer! February 10, 2014 05:09PM |
Registered: 10 years ago Posts: 118 |
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ShadowRam
I have a large repstrap,
There is no way in hell your design is going to work.
If you are using any kind of rollers your boned,
If you don't have your Y-Axis spread out enough from allowing your Z-Axis from wobbling around your boned,
I'm using NEMA 23's. If you attempt to use NEMA 17's your boned.
And to top it all off, your foot print is larger than mine, and mine is made from a professionally (expensive) re-enforced frame and rail system that I still had to upgrade to get stiff enough to 3D Print.
The only way anyone will get a 3D Printer that large working well is if they drop some serious cash on proper linear slides from an automation company.
I don't want to be a Debbie Downer, but I don't want to see anyone waste their money,
It will be a learning experience for you, but seriously, don't put too much money into it thinking it will work.
If it was possible for someone to build a volume that big on a low budget, it would already have been done.
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cnc dick
I agree with Maxx I haven't seen too many large-scale printers that turned out what I would say would be okay. It's not easy you know you're going to need a enclosure to keep temperature up in print area so everything has to be designed around that. That means motors and everything inside is going to have to deal with temperature some of it needs to stay warm and some needs to be cooled. And reliability is very important because of long print times. Pulsedmedia if funds are low I think I would try something about half the size of what you're trying to build or whatever size you can afford to and use good industrial components on. High acceleration and deceleration is really what's needed for printing. And I might add safety so it does not catch fire
Re: Making a huge 3D Printer! February 13, 2014 08:05PM |
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Re: Making a huge 3D Printer! February 18, 2014 06:33PM |
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Re: Making a huge 3D Printer! February 19, 2014 12:15PM |
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Re: Making a huge 3D Printer! March 10, 2014 12:35AM |
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Re: Making a huge 3D Printer! March 10, 2014 12:48AM |
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Re: Making a huge 3D Printer! March 10, 2014 02:27AM |
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PulsedMedia
Melt chamber size is infact adjustable on the "ghetto" design, i can just loosen up the actual hotend, screw it upwards, retighten, shorten the nozzle and screw it back in. Done, smaller melt chamber
Larger melt zone: While obviously retraction is going to suffer, on my testing the original j-head for example has waaayy too small one, often the plastic doesn't get heated up enough even when printing PLA at 230C :O then at times it gets heated up too much. depends on what is being printed.
Re: Making a huge 3D Printer! March 12, 2014 12:46AM |
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Re: Making a huge 3D Printer! March 25, 2014 01:04PM |
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Re: Making a huge 3D Printer! March 25, 2014 02:51PM |
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Re: Making a huge 3D Printer! March 26, 2014 03:18PM |
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PulsedMedia
When printing small things @ low speed, then it heats up too much, since the high temp is to compensate small melt chamber. Manual adjustments is a bad idea as eventually i want to be running these machines autonomously, i got a ton of things to print, just to begin with when design is finalized, i have about 3500hr printing queue :O Just for the ITX Blades + chassis parts.
IMO, better to have large melt chamber and just use bigger retraction
Re: Making a huge 3D Printer! July 03, 2014 08:54PM |
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Re: Making a huge 3D Printer! August 12, 2014 04:16AM |
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Re: Making a huge 3D Printer! August 13, 2014 12:39PM |
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Re: Making a huge 3D Printer! August 13, 2014 07:13PM |
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Re: Making a huge 3D Printer! August 14, 2014 12:58AM |
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Re: Making a huge 3D Printer! August 14, 2014 09:53PM |
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Re: Making a huge 3D Printer! August 14, 2014 10:06PM |
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