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General discussions. For specific printers / electronics / fabrication methods / softwares, please see other sections.
Re: Large-scale 3d printer - 10 years ago
Quotedavew_tx Any updates on the beast? hi dave, only a few, my re-designed port extruder front plate arrived from china. due to an unfortunate family loss, i am half way around the world right now, but i will return home end of january, when i plan to resume work on the 'beast'. i expect things to go downhill really quick from there, pretty much got all the parts i need, and i will keep all ofby val c. - General
Re: Large-scale 3d printer - 10 years ago
QuoteJuliaV To make something that big in ABS would require a heated chamber at about 70C. I thought about that and allowed for it in the design. The printer sits already on a 3/4" mdf board, with the frame bolted down on it. If you have a look at picture 147, you can see there is ample room between the corner of the heated bed and the inside of the frame, 64 mm each direction, to be more precisby val c. - General
Re: Large-scale 3d printer - 10 years ago
i figured a quick drawing might help, on top of the pictures from the previous post. this drawing shows the reinforcing rails with the two wheeled arm sliding along them, viewed from outside (left picture) and from inside (right picture). the reason i added this extra reinforcement is that when dealing with two long rails attached at the ends with gantry plates whose dimensions are small comparedby val c. - General
Re: Large-scale 3d printer - 10 years ago
so, dear reprap diary, while building away at my printer, some better ideas came along. it's unbelievable how much the hand assembling can screw up one's design. with that in mind, i think i solved some torque issues by adding an extra arm with two horizontal wheels on it, to each end of my two x axis.. those wheels will graciously roll on a reinforcing rail placed nearby, not pictured. and preby val c. - General
Re: 1mx1m hot plate? - 10 years ago
Quoterowow Quoteval c. Quotedc42 IMO you cannot build a large 3D printer on a budget. The only way I know of getting a sufficiently flat bed of that size is to use an aluminium tool plate. To heat it, I would ask these people to quote for a silicone heater slightly less than 1m square. They did a custom heater for my delta printer at a very good price, so I would expect it to cost a lot less thaby val c. - Mechanics
Re: 1mx1m hot plate? - 10 years ago
Quoterowow Quoteval c. Quoterowow Ive already researched into these, and as you see yourself 500$ is way too much for me. rowow, you might want to look past the value of the money. when all is said and done, all the time you have to research and try new methods to heat up that large surface, not to mention possible failures and setbacks, I think it't not worth it. for the 450 usd you pay, you geby val c. - Mechanics
Re: 1mx1m hot plate? - 10 years ago
QuotePaul Wanamaker I'm going to post here, only because this topic will be found and read by others, and they deserve good information. I am however very very disappointed in the tone of this thread, it's almost a shame to post in it. The members that have given the most of their time here are some of the most respected and experienced. Their advice has been very good. Guys, you have my highby val c. - Mechanics
Re: 1mx1m hot plate? - 10 years ago
Quotedc42 IMO you cannot build a large 3D printer on a budget. The only way I know of getting a sufficiently flat bed of that size is to use an aluminium tool plate. To heat it, I would ask these people to quote for a silicone heater slightly less than 1m square. They did a custom heater for my delta printer at a very good price, so I would expect it to cost a lot less than the $450 that has beeby val c. - Mechanics
Re: 1mx1m hot plate? - 10 years ago
Quoterowow Ive already researched into these, and as you see yourself 500$ is way too much for me. rowow, you might want to look past the value of the money. when all is said and done, all the time you have to research and try new methods to heat up that large surface, not to mention possible failures and setbacks, I think it't not worth it. for the 450 usd you pay, you get a stable product, etcby val c. - Mechanics
Re: 1mx1m hot plate? - 10 years ago
Quotecozmicray A large griddle After a print session you could do pancakes and bacon for the whole neighborhood. But at 3Kw you may have to notify power supplier to put a couple more reactors on line? Perhaps a steel tooling plate with many small tubes constructed in it. A large boiler could pump in superheated steam --- the exit steam could be router to heat your house. Perhaps a visitby val c. - Mechanics
Re: Custom Size Borosilicate Glass Seller - 10 years ago
Quotedc42 If you include an aluminium heat spreader plate between the heater and the glass, then you can use ordinary float glass instead of borosilicate. Some people even use float glass directly on top of a PCB bed heater, but I don't advise that. would that work for the 120-130 degrees celsius required for abs? i am asking this because normally float glass cracks at this temperature, and anneby val c. - General
Re: Large-scale 3d printer - 10 years ago
Quotepapabur The sE1X is very customizable in which, with just some longer 2020 extrusions/smooth rods/threaded rods you could easily get 20" out of one..just a thought. The original design is 11.8"x11.8"x10" and is available as a kit at . Also has dual extrusion available now. If you'd like to discuss more about making a larger sE1X, let me know! That's a really big printer for the money.by val c. - General
Re: Large-scale 3d printer - 10 years ago
Quotebonmotwang My machine was designed to print ABS. But I decided to learn how thermal stress is going to affect my machine first. So mechanically, only minimal moving parts will be in the chamber if walls would be added. As a general idea, the smaller sections will heat faster and more. Also, the geometry of the section greatly influences the way heat spreads through it. However, the best waby val c. - General
Re: Large-scale 3d printer - 10 years ago
Finally, the port extruder assembly is ready to be wire connected to the controllers. Had to make an improvisation (for the time being) regarding one of the belts, it is the back angle with two idle pulleys, because in its natural position, this belt was touching the steppers connectors at the back of the extruder stepper motors. Picture 144, if zoomed, shows where the wires come out of the motorby val c. - General
Re: Large-scale 3d printer - 10 years ago
Quotebonmotwang If I decided to enclose the chamber, motors are outside. But first step is just PLA. Indeed, for PLA only, enclosure is overkill. But you might want to use other materials in the future, obviously ABS being the next choice up. Apart from that, there's HIPS, nylon, and god knows what other materials, out there. I hear they even have conductive plastic for 3d printers, as an exampby val c. - General
Re: Large-scale 3d printer - 10 years ago
Quotebonmotwang Great recommendation Val. You are right, and I should get it kicked off. and see what we get. A lot of work has been poured into design the whole assembly. Changing direction at this time is no fun. Thanks Val. Again, nice chat :-) Hi bonmotwang, Just an afterthought. Should you ever decide to enclose the machine, you get to keep the motors out of the heated areas. And yes, it'by val c. - General
Re: Large-scale 3d printer - 10 years ago
Quotebonmotwang Hi Val I like your machine. very solid, which is my way into this. I just kicked off CNC machining last night. There are 26 different kind of alum. parts. But I have been debating with myself at late stage of corexy design of my machine: Do I really need corexy or just use normally way. My frame is about 1000mmx880mm and 900mm height. Total weight of the machine may hit 50Kg. Iby val c. - General
Re: Large-scale 3d printer - 10 years ago
So, I finally received the new port extruder. Please see attached pictures. Pictures 139, 141 and 142 show the port extruder mounted, with the dual extruder on it. Picture 140 shows the reinforcements I designed in order to keep the two x axis rail at the prescribed distance, and reinforce the whole assembly. Now, moving on to the glass and the issue of leveling it parallel to the xy plan (trammiby val c. - General
Re: Large-scale 3d printer - 10 years ago
Quotedavew_tx Val, For your big glass idea, be prepared for non flat conditions all over the surface. Pulling the edges down will only work locally near those points, but the center of the glass will not respond to any edge manipulations. The cork in the center will not care that you tweaked some edge. it has no reason to compress even if you moved an edge 1" or more. To solve that,by val c. - General
Re: Large-scale 3d printer - 10 years ago
Quoteetfrench Are you sure? I was under the impression that ABS worked the same as acrylic where glued joints are just as structurally sound as the rest of the material. Hello, etfrench, I plan to print with other materials in the near future. Not so sure splitting would work for, say, ceramics. Better to be sure from the beginning.by val c. - General
Re: Large-scale 3d printer - 10 years ago
QuoteSlaghton Just from thinking this over while taking the time to read the thread, I think it might be better to just have 4 printers with a decent size and split your 3d model so you can print multiple parts at once. It's like have a printer running 4x as fast if you don't mind piecing them together later. Ex: running a computer program designed with multithreading/multicore support for higby val c. - General
Re: Large-scale 3d printer - 10 years ago
Quotebonmotwang Hi Val The thread is in my signature. Understood that if the only heat source is the heated bed, there is no too much of problem. I have no concern about that in my design either. I am just thinking ahead if I make an enclosure to get the internal chamber to 60C. Then the problem may show up in some ways. Hi bonmotwang, I am still learning the ropes with regards to this forumby val c. - General
Re: Large-scale 3d printer - 10 years ago
Hi bonmotwang, Please see attached picture. The four horizontal slots are designed for thermal expansion. The 'cold' position is the side of the slot closer to the nearest vertical face. As thermal expansion occurs, the screws and the bed assembly will 'travel' outward, towards the rounded surface that connects the horizontal and the vertical faces. Hope this gives you an idea.by val c. - General
Re: Large-scale 3d printer - 10 years ago
Quotebonmotwang Glad we are talking about big printer here, because I am building one too. I brought up the topic of thermal expansion in my other thread, but nobody commented anything. LoL. At 1 meter length, the expansion is about 1mm from 20C to 60C. Do you think this will cause any issues in your design? Hi bonmotwang, I am not familiar with the thread. Could you please re post it here,by val c. - General
Re: Large-scale 3d printer - 10 years ago
QuoteJamesK Quoteval c. I am considering enclosing the entire behemoth, but I am still studying this venue. Looking at the photos, I think it's more or less the case that the room is the enclosure! I'm amazed and impressed by your ambition with this project, it makes my own attempts seem so very moderate. Quotedavew_tx So I decided first to create a printer while developing a vacuum. broken logby val c. - General
Re: Large-scale 3d printer - 10 years ago
Quotedavew_tx val, nice work for sure. you have solid ideas and I'd say your next batch of challenges will come once you start slicing/hosting/printing and learning about how the machine reacts to heat, time, motion, etc. As for the 4 screw z axis, I had a 2 screw axis (18" parker daedal linear stages, 5mm lead screws, impossible to backdrive) on my first machine and found that I fiddled with tby val c. - General
Re: 1mx1m hot plate? - 10 years ago
Quoterowow Hello, Currently I am making a 1000m+ cube 3d printer. I already have all the mechanics planned out (currently all of the material will ship in in the next few weeks which costed under 400$) but the only issue I cant wrap my head around is the heat bed. I want to print is abs and later homemade 3d printer filament/PETE/PET which warps as much as ABS, *A head bed which can go 120C-150Cby val c. - Mechanics
Re: Large-scale 3d printer - 10 years ago
Hi Dave, I believe 700,000 dollars is a bit too much. From what I hear, the bigrep is around 70,000 dollars (up from 40). 3/4 million would most likely buy you one of those fancy industrial machines. Either way, that's too much money for me, that's why I decided to go this way. SO far, I sunk about 10-11,000 dollars in my machine. 80/20 seems to be the aluminum extrusion, if I'm not mistaking,by val c. - General
Re: Large-scale 3d printer - 10 years ago
the envelope size was an issue for me. since I am not Rockefeller with a big house, the whole sucker takes up my living room. as you said it yourself, the machine size being 3 times the building size is definitely not an option. also, be careful about other considerations that might arise. I remember reading about a large industrial printer which requires special floor underneath it to support alby val c. - General
Re: Large-scale 3d printer - 10 years ago
Hi again, Dave, I am not too worried about my extruder, I purchased it as is from Micron 3Dp, it's an all metal dual extruder. This is one of the reasons why I bought it, the other being how ease it is to replace the nozzle without having to recalibrate the whole thing. Thank you kindly for your suggestions, I already pdf-ed them for safeguarding. I sure will need them when testing times come. Tby val c. - General