游泳如何游得更快更长

原文:http://www.triradar.com/training-advice/swim-faster-and-longer/

翻译:

游泳可不是骑自行车或跑步,你必须有很好的技术。通常认为:如果你的泳技不高,就没必要在泳池里面游来游去。你首先需要提高你的技术,对吗?

事实上,不是这样的。你仍然可以游得很快,即使没有完美的技术。

如果你把世界上最好的20位铁人三项选手放在同一个游泳池游泳训练,你将看到20个不同游泳风格。 但他们会游得很快,他们的技术绝不是完美的,而且每个人都不同。但也有一些共同点,那就是:他们每天游泳大约90分钟,并已经这样做了多年。

运动员詹姆斯Cunnama,赢得了2012年长距离铁人三项挑战赛,他是TBB的队内训练的一员。当年,他去找教练布雷特·萨顿,教练说:“你的技术像教科书里讲的。唯一的问题是,频率不快“。我只是需要做更多的游泳训练,增加频率就可以了。在教练的游泳队中有些人的动作看上去不像是伟大的游泳运动员,但他们游泳速度快得令人难以置信。“Cunnama的经验表明,技术不太好,也能游得很快。

游泳实际上可以归结为两个简单的数字。
1。动作频率:你每分钟多少个动作
2。动作行程:每个动作游多远

开放水域的优秀游泳运动员的频率在每分钟75和95次之间,而年龄组的铁人三项游泳选手的动作频率为每分钟50至60次。如果你能提高你的动作频率,而不缩短你的动作行程,你会游得更快。

你的动作频率是受你的游泳素质的体现 – 如果你的游泳素质好,你可以更快,更有力的双臂划水。
你的动作行程主要是你的游泳技术决定的。技术越好,动作约有效率,那么行程就越长。

动作频率和动作行程之间也有关系,你的技术提高的时候,你的动作频率可能提高,你也会更强壮,动作频率也很提高。

结论,你的游泳训练需要两条腿走路。一是要经常游泳,并逐步提高,就像你跑步或骑自行车训练一样。这将帮助你变得更强壮,提高你的游泳动作频率。二是寻找教练,提高你的技术,这样就可以增加动作行程。二经常的定期游泳,你还会提高你的水感。你在水中移动的感觉。
如果你找不到正规教练,你仍然可以专注于动作频率。这需要艰苦的训练,以提高您的游泳能力和水的感觉。

当然你需要一些测量动作频率的设备,用数据来指导你的训练。

前50米,45个动作,43秒,动作频率=1.05个动作/秒, 动作行程=1.1米/动作

后50米,52个动作,50秒,动作频率=1.04个动作/秒, 动作行程=0.96米/动作

比如:Garmin Swim (手表)

Comments off

映趣科技正式发表 inWatch One 智能手表:Android 4.0 定制系统、200 万像素相机、支持 GSM 网络

inwatchone1

可穿戴式设备是当下市场的一个热点,对商机嗅觉敏感的国产厂商自然是不会错过这一块「蛋糕」啦。今天来自深圳的映趣科技就为我们带来了一款名为 inWatch One 的智能手表新品,这款设备配备了双核 1.2GHz 处理器和分辨率为 240 x 240 的 1.54 吋电容式触控屏幕。其余规格则有 1GB RAM、8GB 内建存储空间、200 万像素相机。inWatch One 采用了 500mAh 电池,支持充电器、USB 及无线充电。按照官方的说法,其续航时间可达 36 至 48 小时,待机时间最长为 120 小时。连线能力方面,它支持 GSM 网络(没错,可以插 SIM 卡打电话)、Wi-Fi、蓝牙和 GPS,至于运行的系统则是基于 Android 4.0 定制的 inDroid 系统。

和许多腕戴式设备一样,inWatch One 配有多个可用于追踪人体健康数据的内建感应器。除此之外,它还支持多款热门应用,包括微信、新浪微博、QQ、百度音乐等在国内十分流行的 App 均出现在了 inWatch 的应用中心之中。发售信息方面,从今天开始消费者已可在官网上购买到 inWatch One 这款产品,它共有红、蓝、金、白、银、黑这六种配色,售价为人民币 1,788 元。另外,还有一款蓝牙版的 inWatch BT(跳转后可见产品照)将会从八月月末起接受预定,价格为 688 元

Comments off

可穿戴电子产品(ZT)

Comments off

可穿戴设备构建“第四金矿”市场规模达百亿美元(ZT)

伴随大数据时代的到来,实时的数据在帮助决策的过程中变得越发重要,这令可穿戴设备的需求激增。据预计,可穿戴式智能电子产品市场的规模到2016年将达100亿美元。

今年以来,可穿戴设备作为一个新鲜名词成为大众关注的新焦点,也因此成为股市的活跃一族。更有人将之称为继电视、电脑、手机之后的“第四平台”,或可能成为“第四金矿”。

何为可穿戴设备

可穿戴设备这一概念可谓是热火朝天,但很多投资者对之只是一知半解。那么,可穿戴设备究竟先进在哪?它又将给我们未来的生活带来什么影响?

在移动互联网时代,创新一个平台无疑是最具“钱景”的事业。典型者如乔布斯创造了苹果智能手机。然而随着智能手机竞争日趋白热化,“智能手机平台”的争夺已基本尘埃落定。下一个“平台”是谁?从谷歌到苹果,从三星到索尼,都用行动给出了答案——以智能眼镜、智能手表为代表的可穿戴设备。最新消息显示,索尼和三星将分别于8月底和9月初推出各自的智能手表。映趣科技联合创始人李昂则干脆认为,可穿戴设备代替手机不过是技术和时间的问题。

据了解,伴随各类可穿戴设备的综合应用,可穿戴设备的应用领域也将从外置的智能手表、眼睛、鞋子逐渐进入人体内部,如智能隐形眼镜、PH胶囊等就将为人体医疗保健作出贡献。而可穿戴设备的应用对象也将由人、动物向房屋、桥梁等建筑设施进行扩展监控。由此可见,可穿戴智能设备将与手机同等重要。因为它可以提供更自然的交互体验,解放人们的双手,甚至嵌入人们的身体。

深圳映趣科技率先于8月8日在北京798正式发布inWatch智能腕表。索尼和三星将分别于8月底和9月初推出各自的智能手表。据悉,索尼这款新品已是索尼SmartWatch的第二代产品,其造型跟上一代基本一致,但这次索尼公司为其加入了NFC功能,能通过一触连接功能与Android手机完成配对,还可以配合蓝牙用手机处理来电、接听和回电等功能,也能查阅短信、邮件、日程和天气。除此之外,新浪微博和人人等社交媒体的好友状态也可在上面查看。更值得注意的一个信息是,近日有消息称,根据三星最新提交的一份商标注册文件,该公司正在研发的智能手表或将被命名为Galaxy Gear。9月4日,三星将发布一款新的Galaxy设备,该设备很有可能是智能手表。

海外巨头的集中发力,也促动了国内手机巨头的“跟随”。据悉,除了小米之外,华为也筹谋进入可穿戴设备领域。知名科技媒体人李瀛寰在微信自媒体喟叹道:“大屏四核手机已经只卖千元了,手机产品越来越成白菜价了,手机企业该怎么玩?不可否认的是,我认识的很多家手机企业,在维持现有手机发展外,更多的精力已经转向智能穿戴设备领域了。那才是未来的爆发点。”

不过,市场人士认为,在新品繁多的可穿戴设备产品中,以谷歌眼镜为首的综合智能终端,因为其功能更丰富,独立性更强,有望成为未来可穿戴设备的主导产品。这类产品也最具平台潜质,很可能成为继电视、电脑、手机之后的“第四平台”。

平台的本质就是一个互动网络。平台搭建得好,会产生难以估量的盈利。我们从之前的电脑平台、手机平台已经看到这种力量的惊人。比如,微软的windows由于无数软件企业在其平台上开发游戏和各种应用软件,几乎垄断了个人计算机操作系统市场。苹果的app store也聚集了无数企业和个人为苹果的iPhone、 iTouch、 iPad用户开发应用程序和软件,使得iPhone的用户急剧增加,同时也为苹果带来了巨额的收入。相信可穿戴设备普及之后,相应的应用程序和软件也将带来可观的收入。

 市场规模达100亿美元

今年以来,一向嗅觉灵敏的机构投资者对可穿戴电子产业已经早有布局,产业链上龙头企业的流通股东榜上多次出现各类机构扎堆的现象。

对此,光大证券分析师认为,消费电子主要沿着智能性和便携性两个维度发展,在过去几年中,市场关注的焦点在于智能性维度,即设备从功能型向智能型的演变,但是谷歌眼镜引发了市场对便携性维度的关注。可以认为,消费电子产品从可携带型向可穿戴型的演变刚刚开始,未来甚至向可嵌入型演变,投资机会非常丰富。

映趣科技联合创始人李昂表示,对中国的可穿戴设备市场相对看好,可穿戴设备以后将代替手机市场,这只是技术和时间的问题。他说:“就像智能手机代替功能机一样,这是一个时代的发展趋势,应该是包括手表、眼镜等多个可穿戴设备一起综合实现的功能来代替手机,这要经过一个很长的时间。”

分析师认为,伴随大数据时代的到来,实时的数据在帮助决策的过程中变得越发重要,这令可穿戴设备的需求激增。研究公司Gartner预计,可穿戴式智能电子产品市场的规模到2016年将达100亿美元。无论是用于社交还是保健,可穿戴设备的触角也在广阔延伸,它们可用来测量体温、记录地理位置或是识别语音指令。

谁将“点石成金”

智能手机的爆发,催生了苹果一步成长为巨人公司。在A股市场,也带动莱宝高科、欧菲光、长信科技、安洁科技等零部件巨头在连年熊市中仍顽强地走出了波澜壮阔的行情。因此,从当下判断,在移动互联网时代,可穿戴设备无疑是最具“钱景”的事业。

究竟哪些公司属于可穿戴设备这条产业金链上?细化到产业链投资的角度,目前主要从硬件角度进行挖掘。光大证券分析师称,由于可穿戴设备的外在形态完全不同于智能手机等传统硬件产品,这些产品在硬件方面的变革很大。其中,智能眼镜侧重于光学方面的创新,智能手表是智能手机的缩小版,并加入更多传感器以读取人体脉搏等信息,部分厂商也可能在腕带处采用柔性化硬件设计。

“目前看来,硬件上的机会确定比较强的就是在FPC(柔性电路板)、柔性屏和MEMS(微机电系统)这些领域,当然还有传统的电池、通信模块等,如果公司能够直接切入苹果等巨头的产业链体系当然是最好的,不过国内厂商的快速跟进也有望创造更多的产业链订单。”一位业内人士分析道。

事实上,MEMS传感器已是可穿戴设备产业链中的点金石。MEMS被称为微机电系统,主要包括传感器和执行器两类,广泛应用于汽车、智能手机、平板电脑和可穿戴设备。中国微纳技术俱乐部会长王懿介绍,各类传感器功能性的全融合将成为传感器的研发方向,未来可穿戴产品终端前景的发展将取决于传感器等产业链上游技术的提升,MEMS创新应用将是可穿戴设备发展的源泉。

上市公司中歌尔声学率先涉足MEMS传感器,歌尔声学称,公司很早就开始研发MEMS产品,目前MEMS麦克风产品已推向市场,主要是面向国际。此外,从汉威电子和士兰微获悉,两公司均及时捕捉到了市场热点,正积极研发可穿戴应用传感器和加速传感器,但具体研发进度及未来市场前景还无法预计。

此外,FPC概念的丹邦科技和得润电子,MEMS概念还有金龙机电,有望切入谷歌眼镜供应链的德赛电池,具有柔性电路板生产的工艺技术研究和经验的超华科技,涉足可穿戴设备相关芯片的北京君正、中颖电子,以及供应无线通信模组的环旭电子等。(记者 郭娴洁)

Comments off

把android手机通讯录转入iphone的一种办法,利用微信

(1)在android 端装上微信,在微信的设置->功能->通讯录安全助手->进入安全助手->备份
(2)在iphone 端装上微信 ,然后在iphone的设置->隐私->通讯录->打开微信访问权限。
(3)然后按(1)的操作进行,最后一步不要选择“备份”而选择“恢复”

Comments (1)

深圳商用3D打印现状考察:不会颠覆任何行业 zt

http://tech.sina.com.cn/zl/post/detail/2013-07-08/pid_8430428.htm

  几乎每天都有关于3D打印的新闻。这项快速制造技术被冠以了可以想象到的所有荣誉。但是,这些概念与现状相差有多远呢?在走访在一线使用3D打印技术的企业后,发现事实是,在可预见的未来,3D打印不会在中国颠覆任何行业。

3D打印并不神秘,也绝非只能在学术研究的实验室才能见到。事实上,深圳作为“世界工厂”和“设计之都”,3D打印技术的商业应用已经在这里发展了一年多。许多人知道国内主流的桌面3D打印机生产厂商大半都在深圳,但鲜为人知的是,深圳已经有不少专业的工业级3D打印服务商和大规模应用3D打印的工业设计机构。

深圳市源创尚品工业设计公司是一家深度应用3D打印的工业设计机构。据其总经理廖天佑介绍,目前他们有近10%的设计案会引入3D打印来进行手板制作。但是这家工业设计机构并不拥有3D打印机,为他们提供3D打印服务的是深圳市茂登科技公司——这是一家专业3D打印服务商。茂登公司通过进口工业级3D打印机作为生产设备,为包括源创尚品在内的多家客户提供3D打印服务。

这种组织形式,使得符合商业应用需要的高精度3D打印可以顺利进入工业生产的环节。

桌面3D打印机只是“玩具”?

3D打印技术事实上已经发展了40年,这种通过逐层堆积材料来叠加成为产品机构的制造方式,与传统制造业通过模具、车铣等机械加工方式对原材料进行定型、切削等完全不同。3D打印将三维实体变为若干个二维平面,通过数字化的管理,大大降低了制造的复杂度——不需要复杂的工艺、不需要庞大的机床、不需要众多的人力,直接从计算机图形数据中便可生成任何形状的零件,使生产制造得以向更广的生产人群范围延伸。

近两年3D打印又成为科技概念的热门话题,是因为桌面3D打印机的诞生和推广。这种基于开源硬件解决方案开发生产出来的3D打印机,实际上是对于大型工业3D打印机的简化和廉价化。深圳拥有多家桌面3D打印机的生产商,但其产品仍处于起步阶段。以技术研发进展较快的深圳维示泰克公司为例,他们生产的桌面3D打印机售价不到一万元,可以使用几种塑料线材作为原料打印制造小型物品,虽然其官方称他们生产的3D打印机精度可以达到0.2毫米,但实际精度往往达不到。而且之前与维示泰克公司负责人交流时,对方也表示桌面3D打印机制作的物品“比较适合作为展示使用”——言下之意是,还不能用于功能性零件或产品的制作。

这并不是维示泰克一家的问题,事实上国内所有的桌面3D打印机生产商都面临这样的问题。而国外较为热门的桌面3D打印机,也未必比国内更先进多少。将3D打印机小型化廉价化之后,包括自动化控制、材料科学和温度控制等等几个核心技术难点是全世界3D打印机研发行业正在试图突破的。在现阶段,如源创尚品总经理廖天佑所直言不讳的,“桌面3D打印机只是玩具。”

(上图为深圳维示泰克公司生产的桌面3D打印机)

3D打印几乎完全用于手板制作

廖天佑是工业级3D打印机的用户。茂登公司向他提供服务的工业级3D打印机采购自以色列,价格上百万元。工业3D打印机不仅可以实现最高0.01毫米(10微米)的高精度打印,还可以根据需求更换不同的喷头与托盘,以打印不同材质的产品,包括金属材料、类石膏材料和软硬可调材料,甚至是多材料的混合打印——而这些实际上已经很成熟的技术,由于与消费者较遥远,还依然被大众舆论认为是科幻和实验。

“我们使用3D打印来制作手板,而像茂登这样的3D打印服务商,99%的业务订单也就是制作手板。”廖天佑如此介绍。

一般的工业产品,从最初的技术调研到最后的量产,要经历至少14个流程环节,而廖天佑所提到的“手板制作”是其中非常重要一环。手板亦被称为“首板”,是指在没有开模具的情况下,根据产品图纸做出的若干个产品样板,主要用来验证产品,包括外观、结构和功能。由于最早这种样板只能靠经验丰富的技师手工制作,所以学名“手板”。当然目前的主流的手板制作也是是采用如数控机床等现代设备完成的。由于3D打印天生不需要模具,自然就成为了制作手板的前沿选择之一。

廖天佑分享了近期一个他主导的锁具产品设计案例。由于这是一个设计为采用特种金属制造的锁具,所以用数控机床切出来的传统手板,在材质上完全不能验证锁具设计的可行性。在以往,这种特种锁具的设计,只能是在纸面工作尽量完善周密的情况下,跳过手板直接制作模具,拿模具浇筑制造出一个原型产品来做验证。这就面临一个风险,如果确实存在设计缺陷需要调整,那么整套模具几十上百万的费用都打了水漂。许多欧洲著名的手工保险柜之所以要卖到天价,有一部分原因就是由于这种为了验证而沉没的设计成本太高了。

但因为采用3D打印技术,廖天佑轻松完成了这个锁具设计的挑战。他直接将金属原材料制成粉末,在工程师的协助下使用3D打印按照不同的设计图纸一次打印了五个锁具原型,最终有一个通过了验证。原本可能要花一年才能完成的设计案,他们只花了两个月时间。“即使第一批五个产品都验证失败了,我们去研究问题调整设计,再用3D打印重新制作手板,也只需要一两周的时间。”廖天佑补充道。

廖天佑认为,3D打印制作手板与传统的工业流程具有性质上的不同:“手板只是一个模型,只能做到无限逼近原型产品;但3D打印制作的手板,其实就是第一个产品,它应该与量产的产品没有差别。”而这,也正是3D打印技术的优势所在。

(使用3D打印制作的石膏人像,直接使用彩色原料打印出色彩,无需后期上色,其剖面也是彩色的)

在中国,3D打印太贵了

虽然3D打印技术在精度和速度上有着无可比拟的优势,但走访的大部分工业设计师和生产企业管理者都认为3D打印过于昂贵。廖天佑也承认,他们作为一家对3D打印接受度较高的工业设计机构,也只有不到10%的手板是采用了3D打印来制作。

这与不少人的想象并不一致。3D打印的概念被追捧的原因之一,就是因为它可以让小批量的生产更加容易和廉价。但这些来自国外的前沿技术思想,并没有考虑到中国市场的实际情况。

鲜为消费者所知的事实是,得益于中国的世界制造业中心地位,许多廉价的快速成型技术在中国被改良优化,并形成了充分竞争的行业。再小批量的生产,都会有合适的代工厂愿意承接。而另一方面,虽然如中科院先进技术所等科研机构已经自主研发出了工业级3D打印机,但能够量产应用在商业中的,还都是进口产品。连设备带打印耗材都进口的结果,就是在国内的商用3D打印成本居高不下。

于是,3D打印没有成为主流工业设计和制造企业的优先选择。即便是对于复杂结构或者特殊材质的产品,聪明的中国人也有自己的办法——比如,有制造业人士告诉记者,经验丰富的技师可以使用整块的铝合金在机床上快速制作一个模具,虽然这种快速模具拿来生产三四个产品就会报废,但同样可以花很少的时间和很低的成本来制作一些复杂结构和特殊材质的产品。

在拥有大量技术工人和大量“独门工艺”的中国,目前3D打印技术还没有什么非用不可的理由。

(精度达到0.01毫米的齿轮,细节处只有头发丝粗细,可以用工业级3D打印机轻易制作出来)

美国的技术思想遭遇中国的工业现实

有趣的是,MakerBot——美国最有名的桌面3D打印机开发商之一,它的联合创始人Zach Smith在退出这家公司后目前旅居深圳,在华强北自己做了一个孵化器工作室。作为3D打印技术的前沿人士,他在接受采访时并没有多谈3D打印,而是一个劲的在夸赞“深圳是创客(英文maker,译作创客,可理解为硬件技术开发者和发烧友)的天堂”。

Zach对记者说了这样一段话:“深圳就像一个巨大的‘科技超市’,这里有许多的工厂会搞定你想做的任何事。你不需要费心去学习如何使用生产工具,也不需要为材料、元件所烦忧,你只需要专心设计就能把想法变成现实。而在美国,已经没有什么作坊能提供这些知识和工艺了,一切都得自己摸索。而深圳的工人可以更快地做出质量更好的东西来。在美国要花100美元才能做出来的电路板,在这里只要上网花50块人民币就能买到。十倍的差价意味着,不需要太多花费你就可以迅速从电脑模拟进展到真机测试。你可以在网上买到任何电子元器件,去工厂也不过一个多小时的路程。但是在美国,为了跑供应商你可能得坐飞机在俄亥俄州、马里兰州和旧金山之间飞来飞去。”

(zach smith(中)在华强北的孵化器工作室)

美国人希望借助3D打印机来建立的理想工业生态,在深圳已经存在了十几年。

廖天佑对此也有同感,在采用3D打印技术后,他的公司对海外设计订单的承接能力也大大提升了。“美国人发现,他们找我做,加上海运的时间和费用,都比他们在美国本土要做更快更便宜”。为了追求这些海外设计订单的完成速度,廖天佑甚至把这些订单需要的小批量产品全部使用3D打印来制作——即便如此,所需要的费用仍比在美国生产要便宜。

“颠覆”不是在现在

3D打印成为热门概念,源于2012年美国总统奥巴马将其列为“全美制造业创新网络计划”的重要方向。所以在科技行业中确实存在这样一种观点,认为3D打印不过是基于美国的政治经济诉求所营造的噱头。无论这种观点是否靠谱,一个不争的事实是,在中国3D打印只是一种可供选择的设计制造工艺。它能够提供一些便利,但与中国良好的工业生态基础相比,优势也不明显。

但曾有媒体采访中科院专家的报道中透露出这样一种思考:中国也面临人口红利拐点的问题,在未来迟早要面对人力资源昂贵和技术工人短缺的问题。3D打印技术的普及无疑有助于在这种社会变化下制造业保持高速增长。然而,像富士康这样的超级工厂还在内地大量培养新的技术工人。这些问题也需要到下一代人才会显露出来——为几十年后的风险所准备的解决方案,并不能成为3D打印会在当下颠覆什么行业的佐证。

(在深圳,珠宝设计也是3D打印服务商的主要客户之一)

Comments off

3D打印机对标图(Benchmarking Map)(ZT)

3D打印机对标图(Benchmarking Map)

现在市面上已经出来层出不穷的个人3D打印机,有的是爱好者自制的,有的是专业大公司推出的,还有像Makerbot,Form 1等专业团队开发的设备。那么它们各自在市场上占据什么位置呢,看了这幅图你就会有个粗略的概念了。另外,这幅图还包括了3D设计建模软件以及3D扫描套件的对标。有了这幅图,用户们可以根据自己的需求选取相应的设备方案。

Comments off

美国英文网站关于个人3D打印机的简介

CES 2013 proved to be something of a coming out party for consumer-facing 3D printers. Sure MakerBot earned a fair amount of attention at last year’s show with the announcement of the Replicator, which snagged its share of awards from various press outlets. This year, however, saw a relative deluge in 3D-printing representation, with strong showings from 3D SystemsFormLabs, MakerBot and the cloud-based 3D printer, Sculpteo. Even with so many companies rising to prominence, the dream of truly mainstream 3D printing still feels a ways off — if that is indeed where we’re inevitably heading.

These nascent days are an exciting time, with a diverse array of companies and organizations vying to be the first to bring the technology to our homes. In a sense, many roads lead back to RepRap, the open-source, community-fueled project aimed at creating a self-replicating machine. As such, the same basic technology underlies many of these devices. At their core, these 3D printers are not unlike their 2D counterparts, offering a way to translate images on computer screens into real-world analogs — only in this case they’re objects you can hold in your hand.

Most of these work by melting plastic (largely Lego-like ABS or biodegradable PLA) and squirting it out through extruder heads. The heads operate along the X and Y axes, while the build platform (generally heated in the case of ABS and unheated for PLA) moves downward, allowing the glue gun-like extruders to build up the thin layers of plastic. Some printers rely on other technologies, many of which are rooted in the world of rapid prototyping, a category of fabrication that has been around for decades and used by companies like Boeing and Ford to created scale models of concepts.

There are a surprising number of companies and organizations currently invested in the space, be it through pre-fabricated models, kits or open-source, downloadable plans. We pulled together a list of some of the most prominent, which you can check out after the break.

3D SYSTEMS

DNP The shape of things to come A consumer's guide to the 3D printer market

The Machine: CubeX
The Price: $2,499 to $3,999
The Features: Up to three colors, up to 10.8 x 10.45 x 9.5-inch build volume, up to 125-micron resolution, touchscreen interface

3D Systems has been in the 3D-printing game since before the term was coined. The company’s CTO, Chuck Hull, invented stereolithography back in the early ’80s. Hull helped co-found the company in 1986 and it has since become one of the dominant forces in the world of industrial rapid prototyping (we saw some of those devices in action when we visited Laika Studios during the production ofParaNorman). Last year, the company released the portable Cube printer, an officially branded entry in the consumer space (which coincided with the end of the consumer-facing Botmill line it also owned). At CES this year, 3D Systems offered up a one-two punch, with the release of a faster version of the Cube and themassive CubeX. The latter can do three-color prints and create objects up to 1,070 cubic inches — or as the company puts it, “as big as a basketball.” The CubeX can use either PLA or ABS and runs you $2,499.

BITS FROM BYTES

3D printers

The Machine: 3DTouch
The Price: $3,490 to $4,370
The Features: Up to three extruders, 10.8 x 10.8 x 8-inch build volume (for single extruder model), up to 125-micron resolution.

Another member of the ever-expanding 3D Systems family, Bits from Bytes was acquired by the company in late 2010. It was founded in 2008 by Ian Adkins with the noble mission statement of “democratizing 3D printing for everyone.” Like so many others in the field, BFB’s models are based on the pioneering work of the open-source RepRap Project. On the low-end, the company offers a fairly barebones kit, primarily aimed at education (it sort of looks like something built with a Capsela set), which starts at $1,390 and runs up to $2,170. The more polished 3DTouch features a touchscreen and, on the high-end, three extruder heads — a luxury that costs $4,370

EVENTORBOT

3D printers

The Machine: Eventorbot
The Price: Assembled unit price TBD, $885 pledge on Kickstarter (now closed)
The Features: Low cost, streamlined at-home assembly, 10 x 8 x 6-inch build volume.

This Kickstarter-backed project is the brainchild of Illinois-based Duy Dang, who claims it’s “the perfect beginner 3D printer,” thanks to its low build cost and the relatively few parts required to assemble it. At its center is a single square tube that hides most of the wires. As with the open-source RepRap, many of the Eventorbot’s parts can be printed on the device itself, making it possible to continually upgrade the device

DELTAMAKER

The shape of things to come A consumer's guide to 3D printers

The Machine: DeltaMaker
The Price: Assembled unit price TBD, $499 to $1,099 pledge on Kickstarter
The Features: Delta robot platform, 9-inch diameter x 11-inch build volume, 100 micron resolution

“Why should a 3D printer look like a microwave oven?” DeltaMaker’s not the first 3D printing company to ask the question (in so many words), nor is it the first to adopt this form factor. Still, we won’t begrudge anyone looking to break out of the classic 3D printer style, and certainly anything that makes the experience if watching the act all the more interesting is worth a look. The Florida-based team is around half the way to its $100,000 goal, promising a printer with a 9-inch diameter x 11-inch high build volume and a 100 micron resolution.

DELTA MICRO

DNP 3D printers

The Machine: Delta Micro Up! Plus / Afinia H-Series
The Price: $1,500
The Features: Prints in ABS / PLA, 5.5 x 5.5 x 5.3-inch build volume, 150-micron resolution

This Beijing-based company has taken to calling its products “micro factories.” Delta Micro offers a couple of devices, including the $900 Up! Mini. At the high-end is the $1,500 Up! Plus [pictured], which, at least from an aesthetic standpoint, is the picture of minimalist simplicity. It has a build volume of 5.5 x 5.5 x 5.3 inches and can print in both PLA and ABS plastic. The latter is available in the US under the Delta Micro name or, with the Afinia branding, carrying the H-Series name (under which it took home a “Best Overall Experience” award from Make Magazine).

FAB@HOME

DNP The shape of things to come A consumer's guide to the 3D printer market

The Machine: Fab@Home Model 2
The Price: N/A
The Features: Streamlined building process compared to Model 1, printing in any number of materials: including frosting, clay and rubber caulk

More of an ongoing, open-source collaborative project than a company, Fab@Homewas born out of Cornell’s Computational Synthesis Laboratory (now the Creative Machines Lab) way back in 2006 in order to build a machine that can “make real objects.” The result is a device that can print in an astonishing number of materials, including frosting, rubber caulk, ceramic clay, chocolate and ice. The Cornell team has most recently unveiled the Model 2, which offers improvements to the hardware and software as well as cheaper, easier builds and lower skill-level demands. Fab@Home doesn’t actually sell the printers, but there are ways of getting your hands on one, if you email the right people.

FILABOT

3D printers

The Machine: Filabot
The Price: TBD, $490 pledge on Kickstarter (now closed)
The Features: Not a 3D printer per se, rather a device that recycles plastic into filaments for prints

The Filabot’s not a 3D printer, but it’s certainly worth mentioning in a roundup like this. The crowdfunded device aims to address one of the fundamental concerns of consumer 3D printing: waste. The machine (awarded to investors who pledged $490 or more) grinds, melts and extrudes recyclable plastic into a 1.75 or 3mm spool that can be used with at-home 3D printers. Filabot will work with a number of plastics, including ABS, HDPE and nylon (the company is in the process of testing a number of others, including PLA).

FORMLABS

DNP The shape of things to come A consumer's guide to the 3D printer market

The Machine: Form 1
The Price: $3,300
The Features: Utilizes stereolithography printing for more precise prints, 4.9 x 4.9 x 6.5-inch build volume

The grad students at the MIT Media Lab shared the dream of bringing the professional quality of their school’s rapid prototyping machines to consumers.Formlabs realized that goal by eschewing the plastic extrusion technology found in most hobbyist devices for the far more precise stereolithography wherein a tray of liquid resin hardens when exposed to a laser, until the desired object is fully formed. The process is quieter than much of the competition and the resulting prints achieve a level of detail that blows away what we’ve seen even the most high-resolution consumer printers accomplish. Co-founder Maxim Lobovsky showed us a highly impressive Eiffel Tower print. At $3,300, the Form 1 isn’t the cheapest consumer-facing printer around, but given the quality it’s capable of printing, it’s a downright steal.

LEAPFROG

The shape of things to come A consumer's guide to 3D printers

The Machine: Creatr
The Price: $1,683 (single extruder), $2020 (dual-extruder)
The Features: ABS, PLA and PVA printing, aluminum body, 9 x 10.6 x 8.7-inch build volume, 200 micron printing

The Creatr certainly looks the part of a semi-pro printer, but with a starting price of €1,250 ($1,683), the aluminum-encased the device clearly has consumers in mind. The tree frog-emblazoned box has a build volume of 9 x 10.6 x 8.7-inches, can print in ABS, PLA and PVA and comes with one or two extruders. Leapfrog, which was formed last year, also offers the Xeed, which carries a far pricier €5,460 ($7,353) price tag, has a tablet interface built in, to help you nab your models without the use of a computer.

LULZBOT

DNP The shape of things to come A consumer's guide to the 3D printer market

The Machine: AO-101
The Price: $1,725
The Features: Rugged build quality, 7.9 x 7.5 x 3.9-inch build volume, 200-micron resolution

If you can get around the meme-centric name for a moment, you’ll find that LulzBot is a fairly serious company with some straightforward goals. As with so many others, this Aleph Objects brand took inspiration from the open-source RepRap project — in fact, the company produces hardware, tools and electronics with RepRap makers in mind. Those less interested in the construction part of the process, however, can pick up a prefab AO-101 printer from the company for $1,725. LulzBot calls the AO “the workhorse of the 3D-printing industry,” thanks to its rugged design. The testing process for the printer reportedly involved standing on it, making it print upside down and printing while strapped to the back of a truck driving down dirt roads. If you’re looking for a consumer 3D printer to bring on your next space flight, this might be the ‘bot you’re looking for.

MAKERBOTDNP The shape of things to come A consumer's guide to the 3D printer market

The Machine: Replicator 2x
The Price: $2,800
The Features: Easy-to-load extruder, two extruders, 9.7 x 6 x 6.1-inch build volume, 100-micron resolution

In terms of sheer exposure, MakerBot is the company to beat. Founded in 2009, the Brooklyn-based organization currently seems best positioned to help consumer 3D printing go mainstream. As with so many others, MakerBot’s roots are firmly planted in the RepRap scene, with co-founder Zach Smith having been heavily involved with the project. In spite of those roots, there’s little doubt that MakerBot is a firmly commercial venture. It’s even found itself mired in some controversy after appearing to turn away from the open-source community with the release of the Replicator 2, causing Smith, among others, to critique the company’s business model.

MakerBot made a splash at last year’s CES with the announcement of the first-generation Replicator, which featured an increased build volume (8.9 x 5.7 x 5.9 inches) and dual-extrusion (two-colors). This year, the company showed off its recently released Replicator 2 and the new 2X, the latter of which features dual-extrusion and a heated build platform, optimized for ABS plastic. Both of the second-generation Replicators also feature a number of tweaks to their predecessors’ body, including further increased build volume (11.2 x 6.1 x 6.0 inches for the Replicator 2) and the ditching of the more DIY-looking wooden aesthetic. The 2 and 2x run $2,199 and $2,799, respectively.

MAKERGEAR

DNP The shape of things to come A consumer's guide to the 3D printer market

The Machine: M2
The Price: $1,750 (assembled)
The Features: 8 x 10 x 8-inch build area

Rick Pollack founded MakerGear in order to supply home fabricators with the necessary tools, after attempting and failing to prototype a product of his own at home. Fittingly, the site is a resource for all sorts of 3D printer bits and pieces, like platforms, motors and extruders. The company started life in 2009, creating extruders for MakerBot Cupcake printers, “because the MK4 extruder was not reliable and caused endless problems and frustration for users,” as Pollack tells us. The shipment of those extruders lead other industrious folks, including RepRap community members, to start utilizing the service. The company also offers the plans for a number of kits, including the M1 (Mosaic), M2 [pictured] and Prusa Mendel.

METAMÁQUINA

3D printers

The Machine: Metamáquina 2
The Price: $1,614
The Features: 7.9 x 7.9 x 6-inch build volume, 200-micron resolution

A company inspired by the open-source community that has given rise to so many 3D-printing companies, Metamáquina developed out of the Garoa Hacker Clube, the first hackerspace in Brazil, where its founders Felipe Sanches and Rodrigo Rodrigues da Silva started hacking a MakerBot printer. Now the company is prepping the release of its second-generation device, set to ship this April. The Metamáquina 2 features a build volume of 7.9 x 7.9 x 6 inches — more than double that of its similarly named predecessor. It will run R$3,300 ($1,614) when it hits in a couple of months.

PRINTRBOT

3D printers

The Machine: Printrbot GO
The Price: $1,500 (unassembled kit)
The Features: Portability (folds up into a briefcase), battery-powered, 7.9 x 7.2 x 5.9-inch build volume

Here’s yet another in the long line of consumer-facing 3D printers brought into the world with a little Kickstarter love — well, more than a little. Printrbot creator Brook Drumm managed to raise a staggering $830,000-plus after setting a $25,000 goal. The company designed the device “to be the simplest 3D printer yet.” A small kit can be assembled relatively quickly by beginners — a sort of IKEA-esque approach to the world of 3D printing, if you will. The company also has affordability in mind, with the low-end, foldable Printrbot Jr. running an astonishingly low $399. That price helped the foldable device snag a “Best Value” from our friends over at Make Magazine late last year. The company’s line tops out at $1,500 for the moment, which will get you a Printrbot GO [pictured], a portable 3D printer that fits in a briefcase for the traveling maker. That one was created with help from Ben Heck, of course.

PWDR

3D printers

The Machine: Pwdr
The Price: $1,330 (estimated assembly price)
The Features: Powder-based printing, refillable cartridges

Another attempt to bring pro-level 3D printing to the home hobbyist, Pwdr uses powder-based rapid prototyping, rather than the plastic extrusion at the center of most commercial entries in the space. Developed though the University of Twente in the Netherlands, the vowel-hating hardware is currently in its early stages (Model 0.1), but the open-source plans are currently available online for early hackdopters. According to the site, building one of these should run you around €1,000 ($1,330).

REPRAP

3D printers

The Machine: RepRapPro Huxley
The Price: $599 (unassembled kit)
The Features: The open-source original, 5.5 x 5.5 x 4.3-inch build volume, more portable than other RepRap devices

The project that launched a million 3D printers, RepRap (that’s short for replicating rapid prototyper) began with the fairly noble, awesome and vaguely terrifying intention of developing a self-replicating machine. Spearheaded by Dr. Adrian Bowyer, a University of Bath mechanical engineering lecturer, the open-source, non-profit project has given birth to a number of 3D printing machines, including, most recently, Huxley, named for biologist Thomas Henry Huxley.

Consistent with RepRap’s initial mission statement, Huxley can print a good chunk of itself, as well as its predecessor, Mendel (and vice versa). Zach Smith would use much of the knowledge he gained from the early days of the project to help found MakerBot. In spite of, or perhaps because of, the success of commercial successors, RepRap is still going strong, working toward the goal of complete self-replication and espousing the open-source philosophies on which it was created.

ROBO 3D

DNP 3D printers

The Machine: RoBo 3D
The Price: “Around” $520
The Features: Low cost, PLA / ABS plastic, 10 x 10 x 8-inch build volume, 100-micron resolution

Yet another Kickstarter success story — and a fairly healthy one at that; San Diego-based RoBo 3D has achieved more than eight times its $49,000 Kickstarter goal with about a week left. Price is the big selling point here — at around $520 for an assembled printer, it’s expected to sell for a fraction of the competition. The open-source RoBo 3D has a build volume of 10 x 10 x 8 inches and prints in PLA (though a $99 bump in price will get you ABS). Keep in mind, these aren’t actually shipping yet — the company expects them to go out in March.

ROMSCRAJ

DNP 3D printers

The Machine: M.O.B.
The Price: $960
The Features: Metal body, 8 x 6.3 x 6.2-inch build volume

Yet another RepRap-inspired company, Romscraj describes itself as “a little shop set in the mostly sunny little red dot known as Singapore.” The company currently has three models available. At the low-end, the unassembled Portabee kit will run $490. The high-end M.O.B. cube [pictured] features a build volume of 8 x 6.3 x 6.2 inches, a heated platform and a metal body. That one runs $960 fully assembled — and, interestingly, ships with a free BeagleBone development board at the moment.

SEEMECNC

DNP 3D printers

The Machine: Rostock MAX
The Price: $1,000 starting (non-assembled kit)
The Features: 11-inch (diameter) x 13.8-inch (height) build volume, 50-micron resolution

Another 3D-printing company that’s sought a bit of help from the crowdfunding community, SeeMeCNC began life in late 2011 in an attempt to broaden the maker community’s toolkit. The company’s first 3D printer, the H-1, was firmly rooted in the RepRap community, based on its Huxley design. These days, the site offers a number of build-at-home kits, including the $1,000 cylindrical Rostock MAX [pictured], which features a truly impressive advertised 1,300-cubic-inch build volume. The company’s also working on an LCD panel and SD memory card input to let users control printing on the machine itself.

SOLIDOODLE

DNP The shape of things to come A consumer's guide to the 3D printer market

The Machine: Solidoodle 3
The Price: $800
The Features: Low cost, rugged metal case, 8 x 8 x 8-inch build volume, 100-micron resolution

Back in the fall of 2011, former MakerBot COO Sam Cervantes started work on his own desktop 3D printer, with the aim of taking the space to new levels of affordability. The resulting company is Solidoodle. While the name is arguably unfortunate, the product is anything but. By its second iteration, the company gave the world a remarkably low-priced device, at $500, featuring a 6 x 6 x 6-inch build platform and a rugged body that built upon its founder’s engineering past. We recently got our hands on the company’s third-generation printer, which ups the build size to 8 x 8 x 8, a scale that also brings the price up to $800. It’s a sizable increase, but it still comes in well below the industry standard for consumer 3D printers. And just to show he wasn’t joking about the whole rugged thing, Cervantes took a moment to stand on the printer, when the company came by our office, taking the whole concept of standing by a product to new levels.

SUMPOD

DNP 3D printers

The Machine: Mega
The Price: $2,539
The Features: Metal case, massive 23.6 x 23.6 x 23.6-inch build volume

This printer’s namesake, UK-based Richard Sum, took to Indiegogo when it came time to fund his labor of love — multiple times, in fact. The printer now comes in three flavors, the original Basic [pictured], Aluminum and Mega (the Aluminum version with an increased build volume), ranging in price from £300 ($476) to £1,600 ($2,539) to start.

THE FUTURE IS 3-D

DNP 3D printers

The Machine: Glacier Steel
The Price: $2,650 / $3,650
The Features: Steel frame, up to 16 x 16 x 21-inch build platform ($3,650 model), optional dual extrusion ($450 extra)

One of the odder names in an industry full of odd names, The Future is 3-D is also quite likely the only company with an origin directly involving a Jay Leno show. Inspiration arrived when founder Jeff Christiana saw 3D printing in action on Jay Leno’s Garage. From there, Christiana made a jump over to the RepRap community for “months of frustration” that channeled their way into a company that now sells 3D printer parts. It also sells its own printers, like the metal-framed Glacier Steel and the forthcoming Avalanche, which promises to be the company’s largest and most advanced printer yet. That one’s roughly half a year away, however.

TYPE A MACHINES

The shape of things to come A consumer's guide to 3D printers

The Machine: Series 1
The Price: $1,400
The Features: 9 x 9 x 9-inch build volume, standard resolution as low as 100 microns.

Maintaining the familiar plywood aesthetic, the Series 1 printer offers up a 9 x 9 x 9-inch build volume and standard resolutions as thin as 100 microns, using the standard software. Though its creators add that, with some tweaking, they’ve managed to get it down to an impressive 50 microns. Released by San Francisco-based Type A Machines, the box’ll run you $1,400.

ULTIMAKER

3D printers

The Machine: Ultimaker
The Price: $2,269
The Features PLA / ABS plastic, 8.3 x 8.3 x 8.1-inch build volume

Yet another 3D-printer maker born out of the RepRap legacy, this Netherlands-based outfit is “committed to making 3D printing better, faster and simpler.” Ultimaker offered up its first product in May 2011. The current iteration ships as a complete kit for €1,194 ($1,594), featuring a nice build volume of 8.3 x 8.3 x 8.1 inches, without taking up too much space on your desktop. Late last year, the company also entered the pre-built game, with fully assembled printers that run €1,699 ($2,269), a price that includes a free roll of PLA plastic.

 

http://www.engadget.com/2013/01/29/3d-printer-guide/

Comments off

美国网站的个人3D打印机的评测

http://3d-printers.toptenreviews.com/

2013 Best 3D Printer Reviews and Comparisons

Rank #1 #2 #3 #4 #5 #6 #7 #8 #9 #10
10-9  Excellent
8-6    Good
5-4    Average
3-2    Poor
1-0    Bad

Cubify CubeX Cubify Cube LulzBot AO-101 Afinia H Replicator 2 AW3D XL AW3D V5 Replicator 2X Mbot Cube 3DTouch
Cubify CubeX Cubify Cube LulzBot AO-101 Afinia H Replicator 2 AW3D XL AW3D V5 Replicator 2X Mbot Cube 3DTouch
Reviewer Comments Read Review  Read Review  Read Review  Read Review  Read Review  Read Review  Read Review  Read Review  Read Review  Read Review 
Lowest Price Visit Cubify CubeX Trio 
$2,499.00
Visit Cubify Cube  
$1,299.00
Visit LulzBot AO-101  
$1,725.00
Visit Afinia H  
$1,559.00
Visit Replicator 2  
$2,199.00
Visit AW3D XL  
$2,295.00
Visit AW3D V5  
$1,695.00
Visit Replicator 2X  
$2,799.00
Visit Mbot Cube  
$999.00
Visit 3DTouch Single Head 
$3,490.00
Ratings
9.53
8.60
8.08
7.85
7.63
7.58
7.38
7.35
7.25
7.08
10
9
8
7
6
5
4
3
2
1
Overall Rating
Printing Features
Printer Design
Included Components
Connectivity
Help & Support
Printing Features
Reliability Score (Percent) 100 95 90 85 95 95 95 95 95 90
Print Quality Score (Percent) 100 90 80 95 90 95 100 99 95 95
Print Speed (MM per Second) 15 15 200 30 90 150 150 200 40 15
Printing Time (Minutes) 120 120 15 60 18 12 12 10 78 120
Number of Printing Materials 2 2 5 1 1 5 5 2 2 2
Number of Print Modes 3 3 1 1 3 1 1 3 1 3
Number of Print Heads 3 1 1 1 1 1 1 2 2 1
Max Build Height (Inches) 10.75 5.5 3.9 5.5 6.1 7 7.7 6.1 7.87 7.9
Minimum Layer Height (MM) 0.125 0.125 0.1 0.2 0.1 0.1 0.1 0.1 0.1 0.1
Max Build Length (Inches) 10.75 5.5 7.9 5.5 11.2 12 8.3 9.7 7.87 10.8
Max Build Depth (Inches) 9.5 5.5 7.5 5.5 6 8 4.4 6 7.87 10.8
Max Build Volume (Cubic Inches) 1098 166 231 160 410 672 281 355 487 921
Max Print Layer Thickness (mm) 0.125 0.25 0.75 0.4 0.1 0.4 0.125 0.125 0.3 0.125
Print Tolerance (MM) 0.2 0.2 0.2 0.2 0.1 0.04 0.1 0.1 0.2 0.125
Filament Sizes (MM) 1.75 1.75 1.75 / 3 1.75 1.75 3 3 1.75 1.75 3
Printing Cost (Smartphone case) $3.80 $3.80 $3.84 $2.40 $0.22 $0.08 $0.08 $0.09 $0.90 $0.16
Filament Cost $99.00 $49.00 $31.99 $15.00 $48.00 $17.75 $17.75 $21.81 $19.09 $35.90
Printing Jet Material Plastic Plastic Metal Metal Metal Metal Metal Steel Metal Metal
Prints in ABS Plastic
Prints in PLA Plastic
Printer Cartridge Recycle Program
Multicolor Print Capable
Heated Platform
Printer Design
Ease of Use Score (Percent) 100 95 90 85 85 90 85 95 90 90
Number of Printer Housing Colors 1 5 1 1 9 9 9 1 1 3
Printer Weight (Pounds) 84 9.5 18 11 18 18 18 28 35 84
Printer Length (Inches) 20.3 10 18.3 9.6 16 13.5 16 19.1 16 23.6
Printer Height (Inches) 23.5 13 19 13.8 19 13.5 19 20 16 23.6
Printer Width (Inches) 20.3 10 15 10.2 18 12.75 18 12.8 15.7 27.5
Frame Material Plastic Plastic Aluminum Steel Acrylic Acrylic Acrylic Steel / PVC Wood Acrylic
Lead Time (Days) None None None None None 14 None 56 14 42
Meets Safety Standard
Touchscreen Menu
Printer Housing Enclosure
Included Componenets
Number of Models Included 10 25 None None 3 None None None None
Power Supply
USB Cable
Printing Software
Connectivity
USB
Wi-Fi
SD Card
Flash Drive
Help & Support
Warranty (Days) 90 90 90 365 365 180 180 360 None 365
Telephone
Email
Forum/Blog
FAQs
Supported Configurations
Windows 8
Windows 7
Windows XP
Mac

Comments off

3D 打印技术 zt

根据 Businesweek 报道,一家跟踪 3D 打印行业的咨询公司 Wohlers Associates 称,如今 3D 打印机的市场规模在 17 亿美元左右。随着销售量的迅猛增长,公司预测,到 2015 年该市场的规模将达 37 亿美元。

著名的《经济学人》最近描述了 3D 打印技术的前景——这是一种新型的生产方式,能够促成第三次工业革命。

在我们的认知中,工业革命以往发生过两次。第一次工业革命以蒸汽机的发明为标志,认为新的技术革命产生了流水式作业的方式,单一大批量的生产某种产品,这催生了工厂与工人,也让制造业从原始的手工制造转为机械制造。第二次工业革命同样也是一次技术革命,以电力、无线电、钢铁和化学等领域的巨大发展为标志,在各个不同领域进步的影响下,人们的生产方式也发生了变化,这一次工厂不再满足于单一产品的生产,而是转为大规模生产。

那么第三次工业革命与前两次工业革命相比,有何不同之处?《经济学人》指出,在 3D 打印技术得到广泛运用的情况下,制造业也许不再运用工厂这种将人力、资金、设备等生产要素大规模集中化的生产方式,而转变为一种以 3D 打印机为基础的,更加灵活、所需要投入更少的生产方式。《经济学人》将这种趋势称之为“社会化制造(Social Manufacturing)”,当这种方式得到广泛的运用,那么每个人都可以是一家工厂。

杂志同时用一张图来形象的表明第三次工业革命会带来的变化:

为什么 3D 打印机将成为一种生产工具?为什么 3D 打印技术将改变人类的生产方式?

如果是从事着建筑和设计行业的人,他们对 3D 打印技术其实并不陌生,因为他们经常需要用到一种叫“快速成型”的技术,将设计的原型给制作出来,展示给客户看。在从前,这种原型的制作非常麻烦,因为工厂首先需要制作一个模具,然后把原料浇铸在里面,这样才能把原型制作出来。但当工厂制作完成之后,模具就变得没有用处——这种生产方式浪费原料,生产成本自然比较高,所需要的生产周期自然也比较长。

与这种先制作模具,然后才能把设计原型制作出来的生产方式相比,3D 打印机拥有相当的优异性,它能够一次性、直接地把客户所需要的设计原型给制作出来。由于无需经过制作模具这一步骤,客户能够节约时间,工厂能够节约成本,同时所制作出来的物体,也将和设计图纸一样,能够更加精确。

原因在于,3D 打印机能够直接将物体“打印”出来——首先人们能够通过电脑创建一个三维设计图(通常是 STL 或 CAD 文件),然后打印机对这个立体原型进行“切片”,分成一层一层的,然后打印机开始工作,将原材料按照设计图一层又一层的叠加上去,直到最终成型。当然,3D 打印机所使用的材料,自然不是喷墨打印机里面的墨水,而是一些可以发生固化反应的材料,现在可以作为原材料的东西已经多种多样,包括树脂、塑料、陶瓷、金属等等。

实际上,发明家 Charles Hull 生产出第一台 3D 打印机以来,3D 打印技术已经发展了近 30 个年头。而从一个为设计书、建筑师、实验室生产原型的工具,到媒体、大众所关注的议题。这种变化体现了 3D 打印技术在这几十年间取得的突飞猛进的发展,设备的价格从昂贵到便宜,性能从低下到强大,设备体积从大到小,使用范围从窄到广。

1986 年,Charles Hull 离开了原来为之工作的 Ultra Violet Products,开始成立一家名为 3D Systems 的公司,开始专注发展 3D 打印技术,这是世界上第一家生产 3D 打印设备的公司,而它所采用的技术被称之为“立体光刻(Stereolithography)”,利用紫外线照射将树脂凝固成形,以此来制造物体。到 1988 年,3D Systems 开始生产第一台 3D 打印机 SLA-250,体型非常庞大:

自 1986 年之后,涌现了很多不同的 3D 打印技术:

1988 年,Scott Crump 发明了另外一种 3D 打印技术 Fused Deposition Modeling,并成立公司 Stratasys。这个技术的特点是它能利用腊、ABS、PC、尼龙等热塑性材料来制作物体,具备性能优良的特点;
1989 年,C.R. Dechard 发明 Selective Laser Sintering,利用高强度激光将材料粉末烤结,直至成型。这种技术的特点在选材范围广泛,比如尼龙、腊、ABS、金属和陶瓷粉末等都可以作为原材料;
1992 年,Helisys 发明 Laminated Object Manufacturing,利用薄片材料、激光、热熔胶来制作物体。然而该 3D 打印技术的原材料一直仅限于纸,性能低下;
1993 年,麻省理工大学教授 Emanual Sachs 发明 Three-Dimensional Printing 技术(非本文泛指的 3D 打印技术),利用金属、陶瓷等粉末,通过粘接剂在一起成型。这种技术的有点在于制作速度快,价格低廉,然而成品的强度较低。1995 年,Z Corporation 获得麻省理工大学的许可,利用技术来生产 3D 打印机。
1996 年,3D Systems、Stratasys、Z Corporation 分别推出 Actua 2100、Genisys、Z402,第一次使用了“3D 打印机”的称谓。
2005 年,Z Croporation 发布 Spectrum Z510,这是世界上第一台高精度彩色 3D 打印机;同一年,英国巴恩大学的 Adrian Bowyer 发起开源 3D 打印机项目 RepRap,它的目标是作出“自我复制机”,通过 3D 打印机本身,能够制造出另一台 3D 打印机。
2008 年,第一版 RepRap 发布,代号“Darwin”,能够打印自身 50% 的元件,它的体积仅一个箱子大小。
从这段发展历史中,我们可以看出,随着 3D 打印技术的种类变多,3D 打印机可选的原材料范围也在变广,从树脂到塑料到陶瓷到金属。然而,最重要的是,3D 打印机的价格在下降,1999 年 3D Systems 的 SLA 7000 要价 80 万美元,而公司今年年初推出的 Cube 要价仅 1299 美元。而且,Cube 性能不低,不仅支持彩色打印,还支持无线连接,免费提供设计软件,让平板电脑发挥设计的潜力。

除了 3D System 这样老牌的 3D 打印机生产商以外,一些新兴的 3D 打印机生产商也把目标放在“低价 3D 打印机”上,比如 2009 年成立的 MakerBot,它的产品就只有 1749 美元。不仅如此,最近创立的 Soldoodle 所生产的 3D 打印机仅 499 美元(Basic 版)。而在 Kickstarter 上,出现了售价仅为 300 美元的 3D 打印机 Makibox。

个人电脑的普及,也让 3D 打印机的价格下降。回顾前文中 SLA-250 的外观,我们会发现它就是一个工作站,不仅包括了负责将物体打印出来的 3D 打印机部分,还有负责设计的电脑部分。在 1988 年,电脑的价格不像现在这般便宜,也不如现在这般普遍,将 3D 打印机连同电脑一起卖给客户,是当时合理的选择。然而,时至今日,电脑已经得到了广泛的应用,而且性能有了长足的进步,3D 打印机不必连同电脑一起卖给客户,价格自然得到了降低。此外,以往价格高昂 3D 设计软件也有越来越多的价格低廉的替代品,有些甚至是完全免费的开源软件,比如 123D、OpenSCAD、Tinkercard。这些因素都让 3D 打印成本得到降低。

随着 3D 打印机的成本越来越低,围绕着它所提供的服务也越来越多。最典型的,就像参加 CES 2012 的 Sculpteo,它允许用户上传或直接在网站设计 3D 草图,然后公司将物体打印出来之后,再快递到用户的手中(Sculpteo 还有商城等其它服务)。

最近几年关于 3D 打印的消息层出不求,它的使用范围越来越广。比如:

3D 打印的原材料扩展到金、银以及强度极高的钛,还有不锈钢;
德国 Voxljet 制造了尺寸为 4m x 2m x 1m 的 3D 打印机;
Cornell 大学尝试利用 3D 打印机直接打印出食物出来;
Exeter 大学的研究人员,制造出以巧克力为原材料的 3D 打印机;
哈佛大学的实验室开发可以实现生物细胞打印的设备;
德国 Fraunhofer Institue 利用 3D 打印技术将血管给打印了出来;
Loughborough 大学的一个研究小组正在尝试让混凝土成为 3D 打印的原材料;
Organovo 开始研究如何利用 3D 打印机来打印人体器官。
总结以上的趋势,那就是 3D 打印技术的部署成本越来越低,以现在的价格,几乎每个人都可以拥有一台 3D 打印机。而随着选材范围越来越广,3D 打印机可制作的物品越来越多,从汽车、飞机零件,到食物,到人体器官等等。加之如今网络的发达,每个人都能够成立一个像 Sculpteo 这样的网站,按客户需求,个性化定制物品,让“社会化制造”成为可能。

Comments off

« 上一页 Previous entries « 上一页 · 下一页 » Next entries 下一页 »