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[技术交流] DIY爱好者开源全套DLP投影成型技术的3D打印机资料(一)

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本帖最后由 dawnbird 于 2013-8-14 13:53 编辑

Step 1: Basic design properties
1步:基本设计特点
DIY爱好者开源全套DLP投影成型技术的3D打印机资料(一) - 3D打印机网 - F7MWIZSHJ369CRO_LARGE.jpg
3d打印机中需要注意的事项:
遵循如下几点使我们提出的打印机新构造设计完全符合我们的预期。这台打印机将是一件原型,我们计划在不久的将来建造一个更酷、更完善的版本。有希望在2013末被完成。并且如果所有问题都能解决,我们甚至获得kickstarter资助(译者注:Kickstarter于2009年4月在美国纽约成立,是一个创意方案的众筹网站平台,Kickstarter网站致力于支持和激励创新性、创造性、创意性的活动。通过网络平台面对公众募集小额资金,让有创造力的人有可能获得他们所需要的资金,以便使他们的梦想实现。)(希望如此)
打印机必须具有下面的特点(没有次序之分):
1、经济
2、开源
3、简洁
4、分辨率高
5、可选择材料多
6、操作方便
7、快速


基本操作程序:
光刻成型3D打印机工作流程:过程非常简单,光照射树脂,树脂硬化成型。为了提高成型质量和精度,需要高能光线来照射树脂使其聚合。


首先确定用哪种光源
关键在于光能的定量或者剂量(放射学上的术语)


光剂量你可以用3个参数来衡量,即光能,光强度和照射时间,加起来就是整个光剂量。通常只有光谱中用在固化材料的紫外光被计做光剂量。其余光被反射或吸收转化为热。


只有有足够能量的光子才参与光聚合。这意味着你使用何种树脂是我们决定用哪部分光(电磁)谱的决定因素。大多数光聚合树脂在紫外光下会发生聚合,即波长在365nm到420nm的光


游客,如果您要查看本帖隐藏内容请回复


本帖资料由   版主 dawnbird 翻译 ,版主 zwltanf 采集。感谢二位为3D打印机DIY 事业的贡献!看来帖子拿了资料不回帖的!诅咒你们!!!“树脂买到假货、投影聚焦有畸变还漏光、光源通电就废、电路板一碰就断!!”

DIY爱好者开源全套DLP投影成型技术的3D打印机资料(一)
DIY爱好者开源全套DLP投影成型技术的3D打印机资料(二)
DIY爱好者开源全套DLP投影成型技术的3D打印机资料(三)
DIY爱好者开源全套DLP投影成型技术的3D打印机资料(四)
DIY爱好者开源全套DLP投影成型技术的3D打印机资料(五)
DIY爱好者开源全套DLP投影成型技术的3D打印机资料(六)
DIY爱好者开源全套DLP投影成型技术的3D打印机资料(七)
DIY爱好者开源全套DLP投影成型技术的3D打印机资料(八)
DIY爱好者开源全套DLP投影成型技术的3D打印机资料(九)
DIY爱好者开源全套DLP投影成型技术的3D打印机资料(十)
DIY爱好者开源全套DLP投影成型技术的3D打印机资料(十一)
DIY爱好者开源全套DLP投影成型技术的3D打印机资料(十二)
DIY爱好者开源全套DLP投影成型技术的3D打印机资料(十三)
DIY爱好者开源全套DLP投影成型技术的3D打印机资料(十四)
DIY爱好者开源全套DLP投影成型技术的3D打印机资料(十五)
DIY爱好者开源全套DLP投影成型技术的3D打印机资料(十六)
DIY爱好者开源全套DLP投影成型技术的3D打印机资料(十七)
DIY爱好者开源全套DLP投影成型技术的3D打印机资料(十八)
DIY爱好者开源全套DLP投影成型技术的3D打印机资料(十九)
DIY爱好者开源全套DLP投影成型技术的3D打印机资料(二十)

Here are a few things to consider in the 3D printer:
I find that making lists like this before every new build really helps me and the people I am working with (it is "we" now) to come up with an effective design that really meets our expectations. This printer will be a prototype, we plan to build a cooler, better more advanced version in a later future. Hopefully to be completed at the end of 2013. And if all works out maybe we can even get to a kickstarter. (Dreaming freely here)
The printer must be,not in any specific order:

  • Affordable.(经济)
  • Open source.(开源)
  • Compact.(简洁)
  • High resolution.(高分辨率)
  • Compatible with a wide range of materials.(可用材料越多越好
  • Easy to use.(易用)
  • Fast.(快速)
The basic operating procedure:
This is how a Photo Lithographic 3D printer works. Photo Lithography is very simple, light illuminates the resin and the resin hardens.
To be more exact a quantity of light falls/shines onto the resin, if the energy quanta of that light is high enough it will induce photo polymerization of the resin.
First thing is to decide on a light source:
The key part in this is quantity of light energy or Dose, a therm that comes from the world of radiology.
The dose is divided in to three vectors as you will, namely photon energy, light intensity and duration of illumination, together giving the total energy dose. Usually in the UV curing of materials the dose is only measured for a specific part of the spectrum. The rest of the light will usually be reflected or absorbed and converted in to heat.
Only photons with a high enough energy will take part in the photo polymerization. This means that the resin that you will be using is the determining factor in the part of the light (electromagnetic) spectrum that we are interested in. Most photo curing resins will cure under the influence of UV light. Light with a wavelength of between 365nm and 420nm.
Some resins also allow for curing with longer wavelengths but these are usually rare and expensive.
1) One of the things to consider is that in order to be able to print with a wide range of resins we would like as much UV in our light as possible. I will explain this in depth when designing the basin, mirror and anti stick coating.
The other part is time of illumination and illumination intensity. The illumination intensity, or luminous flux is the amount of Photons per unit of time that is emitted by the light source.  The longer you illuminate the resin the deeper the light penetrates and the harder and thicker your printed layer gets. This is a very unique feature of stereo lithography where the illumination time is another factor to consider as this determines the build layer thickness.
2) The light source must be of high intensity so the illumination time can be as short as possible allowing for a faster build.
3) An other thing to consider is that the light source needs to be very controllable in switching from illuminating the resin to not illuminating the resin.
In the principle of photo lithography, what gets illuminated polymerizes and what does not get illuminated stays liquid. This means that our resolution or minimum feature size is determined by the minimum spot size.
4) The third parameter for our light source is that it must have the possibility to illuminate a spot that is as small as possible.
Googleing we found that there are two viable light sources/systems that will meet these demands. A blue/UV laser with nice optics to produce a small spot size and a Galvo Head or A DLP projector. A  Lasers are cool but to achieve a small accurate spot with a galvo system felt to us as going way over our heads. Since non of us has any experience in setting up a laser, laser optics and a galvo system. And having the guys from Form 1 as an example (patent issues), maybe one day we would like to offer the world a kit too. We decided to go for the DLP projector option.
There is a whole world of DLP projectors out there.  
A light source passes through a rotating colour wheel and falls on a surface with actuated micro mirrors. These mirrors in synchronization with the colour wheel decide when to either reflect light through the lens or deflect it to somewhere else. Together many micro mirrors form the image.



    As from our considerations in the above we can easily state what properties we want our projector to have:
    1.high UV content (determines if the projector works to cure the resin)
    2.high light intensity (shorter cure time)
    3.high contrast ratio (gives a higher resolution with less light contamination)
    4.high resolution (results in a smaller feature size)
    Last but not least we only have 1000euro's to spend on a beamer. So there is a financial limit too. I realize this is not a small budget for a decent projector, but if the project fails I can always watch a movie on it.
    In the end we decided to use an 7077365 Acer H6510BD DLP FHD 1080p, with 1920x1080pixels. Which we ordered at a local store.
Having the light source sorted we can now decide how to use our light source in our 3d printer:
Wait who ho ho stop, yes I know we are just designing a 3D printer but lets do a quick google on resins (photo curing resins). We found that these materials aint cheap. So this cancels the top down approach option. In common stereo lithography the light source illuminates a pool of resin from above. As consecutive layers form the build platform sinks down in to the vat of resin. This means your work piece can only be as high as your basin is deep. This also means that no matter what the size of your build, you must always have a full vat of resin. Meaning that if you want your largest object that you can print to be the size of a shoe, you will need a constant volume of about 3L of resin in your tank. At 80 Euros per litre, there are always 240euros sitting in the tank.
To us this is a bit much. So bottom up it will be.
There are two reasonable configurations when considering a bottom up 3D DLP printer. We can either project directly onto our build area or we can use a mirror to have our projector at an angle in respect to our build area.
We chose to put our projector at a 90 deg angle and use a single surface mirror to project a crisp image on to our build surface.
This because we are aiming for a true desktop machine, something that really fits on our desktop and is as compact as possible.

回复 百度谷歌雅虎搜狗搜搜有道360奇虎

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kuda 发表于 2013-8-31 22:13:56
资源类型: 学习资料  
资源版本: -

Step 9: Z axis
第9步骤:Z轴


QQ截图20130808100117.png (704.34 KB, 下载次数: 50)

下载附件

2013-8-8 10:03 上传



Z轴包括了一个燕尾导轨,电机箱,两个丝杠座,一个电机座,步进电机,电机座和一大堆螺钉。
本帖隐藏的内容
材料:
10mm厚的铝板
20mm厚的铝板
3mm铝片
20mm圆铝板(或购买联轴器)
15x50黄铜板
3mm的黄铜片
m5x20内六角螺丝4个
m6x6平头螺钉2个
工具:
数控磨(铣)或者从朋友那里借一个
M5套筒
M6套筒

我们用了一些周边店子里现成的材料来做线性滑轨,所以可以随时修改设计和使用不同的材料。我相信你能完成3d打印主轴支承,电机座、联轴器和电机箱的制作。但是因为精度要求你要铣出你的燕尾导轨。
您可以参考我们的图纸来做关键部件。


feiruima 发表于 2014-11-5 16:13:24
3d打印机技术参数:
成型工艺:FDM(熔融沉积快速成型)       
设备尺寸:300mm*250mm*380mm(不含材料盒)
设备重量:5kg
外箱尺寸:450mm*370mm*530mm
包装重量:10kg
介质类型:塑料
定位精度:±0.2mm/100mm
成型尺寸:140mm*140mm*140mm
打印速度:10-60mm/s
层厚:0.1-0.4mm
打印头数量:1个
喷嘴口径:0.4mm
打印精度:0.1-0.25mm
运动速度:0-60mm/s
喷头温度:180-260℃
设备接口:高速USB   USB数据线
API:python
操作语言:中文/英文
成型材料:ABS/PLA(白色/红色/黄色/绿色/黑色等多种)直径1.75-1.8mm 仿木纹、仿石膏
电源要求:250W   110VAC/220VAC(可定制)  50/60Hz
工作环境:温度25℃-32.5℃ 湿度20%-70%
支持格式:.STL文件
软件运行环境:Windows xp,Windows Vista,Windows 7
Q:10963287   t:13343436393
yunfengren 发表于 2013-8-8 19:34:48
沙发,要密码啊?什么情况啊?
beer-boy 发表于 2013-8-11 15:30:33
有密码?顶一下吧~
SKY佳依恒/gy 发表于 2013-8-11 15:50:52
密码多少{:2_25:}
typing 发表于 2013-8-11 17:29:18
翻译好以后公开
woshids 发表于 2013-8-13 14:21:03
好变态的 诅咒啊!!!!!
ses66 发表于 2013-8-13 23:59:20
我承认我是来拿资料的{:2_30:}
a_liang 发表于 2013-8-14 01:36:22 来自手机
好就是在找呢
北極星 发表于 2013-8-14 08:30:28
回复!学习!谢谢
smilecat 发表于 2013-8-14 10:34:27
谢谢分享,辛苦了~
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