by makeme

Posts Tagged ‘cost’

3D Printers You Might Not Have Heard About

In Uncategorized on 07, Dec, 2011 at 22:23

The Felix 1.0 can be found at FelixPrinters.com for about $1100. Designed by Guillaume Feliksdal because he has experience in mechatronics and he thought RepRaps took too long to put together and calibrate. The kit is mostly aluminum t-slot extrusions. It does not seem to be open source, but it is reportedly quick to assemble and calibrate, taking only 2-6 hours to go from zero-to-printing.

“…I love…to realize innovative technical ideas. The printer could also be useful for making my future inventions.” – Guillaume Feliksdal

The Orca 0.30, designed by Gubbels Engineering, can be found at Mendel-Parts.com. The kit is pretty much entirely steel rod and (anodized!) aluminum sheets, is about $800, and seems to be intended to be open source when the design is finalized.

The Mosaic, designed by Rick Pollack, can be found at MakerGear.com. The kit is mostly laser-cut plywood with pre-assembled precision linear guides, is about $1000, and doesn’t appear to be open source.

The Printrbot can be found at Printrbot.com. Designed by Brook Drumm because he figured people needed a printer that was a lot simpler and easier. The kit is about the most minimal combination of ABS and steel rod imaginable, is listed as $500 on the kickstarter page, and a lot of noise has been made about making it open source when the design is finalized.

Printrbot-Mystery-Print from Printr Bot on Vimeo.

The Prusa Air is Mecano’s redesign of the Prusa Mendel. It replaces a lot of the metal and plastic parts with flat sheet. Here it is on Thingiverse.com and the RepRap wiki. He says that the design evolved out of an attempt to make the Prusa more attractive and intuitive enough that someone could put it together after glancing at a picture. He has a version 2.0 on the way.

“Eventually I would like to see, apart from improvements in 3D printers, laser cutting open hardware, open hardware lathes, open hardware phones, etc” – Mecano

The Rook Printer by Jolijar can be found on Thingiverse and at Jolijar’s blog. He’s replaced the vast majority of the RepRap frame with t-slot aluminum and has redesigned the printed parts accordingly.

The Solidoodle 3D Printer, designed by Sam Cervantes, can be found at Solidoodle.com. This is a somewhat unusual design. Most of the functional parts are laser-cut wood, but the whole thing is enclosed in a steel frame that protects the whole printer. It only comes fully assembled for $700. The design doesn’t seem to be open source, but they do have a Facebook page. So you’ll have to make due.

The 3D Micro Printer is a stereolithography system that’s about the size of a large book and is only about $1600. It is the result of collaboration between teams led by professor Jürgen Stampfl and professor Robert Liska at the Vienna University of Technology. The prototype was developed by Klaus Stadlmann and Markus Hatzenbichler. The real strength of this approach, and the reason the overall machine is so small, is that it can be used to print very precise parts. This first generation prints in layers 50 microns (0.050mm) thick.

The following are even farther off the beaten path because they are CNC mills.

Don’t let that be a reason for ignoring them! Unlike a dedicated 3D printer, a CNC mill can do both additive and subtractive work (3D printers aren’t rigid enough to hold a carving tool in place without wobbling).

The MTM Snap has an exceptionally clever design. It was designed by Jonathan Ward at MIT’s Center for Bits and Atoms and it actually snaps together. Yes, snaps. The entire structure is rigid enough for milling but doesn’t include a single fastener. It is open source.

http://blip.tv/play/AYK2j0IC.html

The White Ant was designed by Patrick Hood-Daniel and can be found at BuildYourCNC.com. Looks like it’s around $1000, but for that you get a machine that’s specifically designed to be either a 3D printer or a CNC mill. It’s a compliment to the book, Printing In Plastic, which takes you through the entire build process. It’s extremely hackable, as the design has been released under the Creative Commons license (free to reproduce) and, while it’s cleaner to CNC mill the wood pieces, the entire thing can be made in a garage with power/hand tools.

“I would like to see a machine that would be able to fabricate using multiple materials in one process…I will be developing an SLS machine kit in the near future.” – Patrick Hood-Daniel

ZEN Toolworks, owned by Xin Chen,  has several variations of a hobby CNC. They also have a very nice wiki for learning about their kits. The CNC mill is about $810 and they have a conversion kit for $80 that makes the build volume more suitable for 3D printing. They don’t sell any extruders and Xin explained that they don’t sell a complete kit (mechanical and electrical) for 3D printing because they figure it’s better to get 3D printing-specific electronics from somewhere else. However, you can pick up the mill itself (just mechanical) for about $450 and get the electronics & extruder from a different vendor. This product is not open source.

The micRo (yes that’s how it’s spelled) is available at micro.lumenlab.com for around $700. You’ll get the CNC mill which you can use for 3D printing if you mount an extruder or syringe. LumenLabs does seem to be working on a high-precision 3D printing addition to turn the micRo into the UNIFAB, but there’s not much information at the moment.

Maybe you prefer your projects a bit more…freeform. If so then check out how many 3D printers/CNC machines there are on Instructables.com.

So there you have it. The 3d printing world is a lot bigger than RepRap and Makerbot! The great thing is that more and more of these new designs are showing up all the time. Pretty soon there will be such a huge selection you’ll be able to find one that exactly suits your requirements. Additionally, the point of this post was little-known 3d printers. If you know of one that I missed please share that information with everyone else.

Advertisements

How Low Can You Go

In Uncategorized on 20, Nov, 2011 at 14:34

When it comes to 3D printing, the most expensive part of the system is the electronics.

Makerbot wants $370 for their Gen4 electronics. With their Gen6 stepper extruder (and the driver for it) costing $165, and a set of X-Y-Z motors costing $105, that puts the complete cost of electronics at around $640. I figure this is a good upper bound on what 3D printer electronics should cost since Makerbot’s electronics are probably the most professional and full-featured. I’m not going to include a heated bed in this comparison because it’s not strictly necessary to get started, it’s just a performance upgrade.

Obviously, when there are complete 3D printer kits starting at $500, $640 for just the electronics is unacceptable for my purposes.

The confounding thing is that when you move away from Makerbot (and complete kits in general) you start to have to source from multiple vendors. There is not, as yet, a clearing house for open-source 3D printer components. Sellers tend to focus on one or two options. Additionally, they tend to be located in Europe, so that whole “You want HOW MUCH for shipping?!?” thing gets reversed.

RAMPS and Gen6 are mid-range in terms of performance flexibility and cost. So, you know, whatever. All the electronics kits I know of use pretty much (if not exactly) the same stepper drivers, and they all use USB, and these days they all have an SD-card option, so unless one of them tends to spit out errors more often they all have the same 3D printing performance. 

Sanguinololu seems to be the strongest attempt to whittle the electronics down to just the bare necessities. eMakerShop sells the whole thing (including drivers & firmware tested) for about $170 shipped, they want $95 for the motors (shipped) and $75 for the extruder (shipped). That all comes to around $340. Solidoodle sells the whole thing (without drivers) for $105 (shipped), but doesn’t sell anything else. LulzBot can make up the difference with four Pololus for $65, four motors for $75, and a 12V 25A 300W power supply for $35. They have a hot end that they want $75 for. That all comes to around $350.

There are rumors of people pushing the electronics cost even lower. For example, something called GenL offloads most of the computation to the host computer by using more USB bandwidth. Another example is Repic by Mark Feldman, but I can’t find much information about it.

As you can see, the electronics is the most expensive part of the printer and the stepper motor/driver combination is the most expensive part of the electronics. The need for four bi-polar steppers and four microstepping drivers demands $120 minimum. You might be able to get that down under $100 if you get really lucky on sales or start salvaging parts. The biggest barrier is that these particular parts can’t be made much cheaper. The Sanguinololu board can be brought down to around $60 if you buy the bare PCB, then the components, then burn the bootloader with something you already had (or maybe you can find a chip that’s already burned). But the motors and driver prices aren’t going anywhere.

Some blue-sky ideas for lowering the cost even further involve basically starting from scratch and creating a new family of electronics. The primary reason steppers are so popular is that they don’t require any feedback for accurate positioning. It’s possible that coupling a feedback mechanism (linear resistor, optical encoder, whatever) with a standard DC motor to create a servo would be cheaper. It would also be possible to simulate the entire electronics board on an FPGA for a one-chip solution; just a PCB with the FPGA, its interface, and a bunch of transistors for amplification. Maybe the motors, and their complicated drivers, could be replaced with solenoids and some clockwork. Running all the high-power functions off of AC (out of the wall) might eliminate the need for a power supply (get logic power from the USB).

A 3D Printer Under $250

In Uncategorized on 23, Oct, 2011 at 22:22

All the coolest gadgets are too darned expensive; especially when they’re brand new. 3D printers are no exception.

Even the dramatic reduction in price that the open source hardware movement has managed to produce only brings 3D printers down to just over $500. That’s amazing compared to the commercial options (which start at $10,000) but it’s just not good enough.

I think the goal should be $250. That’s right around the pro-sumer line so anything under it is legitimately obtainable for the average person. You don’t have to worry about how much profit you can generate with the thing when it’s cheap enough.

A printer that cheap could become a practical option for STEM education. It would be a good introduction even if it didn’t have impressive performance.

Based on some research it looks like that price point is obtainable, in theory, today.

The most expensive part is always the electronics. Well, eMAKERshop sells sanguinololu electronics, fully assembled (and flashed), with the pololu drivers, for $125. They also sell a mechanical endstop kit for $10. Nema 17 stepper motors are around $15 from Kysan (4 of those). A 12v 5a power supply goes for around $10 on Amazon. That’s the majority of the electronics right there for about $200.

Now we just need to build the frame and linear motion systems. A 1/4″ x 2′ x 4′ piece of pine plywood can be about $10. Home Depot lists 16″ keyboard sliders for about $15 (3 of those). Assuming you could make the printer out of cabinet supplies, that’s about $55. If the extruder could be made out of a bolt with some nichrome wire (old school I know) it wouldn’t add much to the total, which is now around $255.

There are some crucial assumptions in there like a dirt-simple extruder and no need for timing belts. At any rate I think this demonstrates that the idea isn’t as far fetched as it might at first appear. A big piece of the puzzle will be getting around the need for metal pieces, printed pieces, and laser-cut pieces.

Practical Payback Period

In Uncategorized on 12, Jun, 2011 at 20:29

The payback period of an investment is the amount of time it takes for that investment to produce as much money as it originally cost. The assumption is that any money made/saved AFTER the end of the payback period is what you invested for in the first place. The payback period, then, is how long you have to wait to start seeing a return on your investment.

A 3d printer is, obviously, an investment. For the people who are interested in 3d printers themselves the payback period isn’t really an issue, but for the people who are only interested in what 3d printers can do for them it’s a different story. A common question is, “What can you do with a 3d printer?” People like me are usually quick to skirt the question with a passionate description of the future of 3d printing…but it’s a good question.

What CAN you do with a 3d printer?

Or, more specifically, WHY would the average person pick up a 3d printer at Sears on their way home from work?

I doubt that the proliferation of 3d printers will turn a lot of people into “makers.” Most people probably aren’t going to ever design a single printable object. Does that mean they’d never get their money’s worth out of a 3d printer? Well, I’d like to argue that the average person absolutely WOULD get their money’s worth out of investing in a 3d printer. The only thing holding back 3d printers from being a good investment RIGHT NOW is that they cost more than $500.

What I did was I went through thingiverse and kept track of all the things I could find that served a practical, but not overly specific, purpose (the table is included at the end of this post). After I found something that looked practical, but pedestrian, I shopped for it online. I found that most things could be had for about $1-2 dollars, which sounds about right for hunks of plastic. A few things, however, were more expensive. To make this a realistic test of the principle I made an effort to price out the cheapest thing I could find. Even holding the costs down, the estimate came out to more than $400 in savings.

This doesn’t include costs like the raw plastic, or electricity, but I can’t imagine those are greater than or equal to the costs of gasoline and shipping, which aren’t included either. Obviously, one could perform a more rigorous analysis, but I think the point stands. An average person COULD pay back the cost of their 3d printer $1-10 at a time…just as soon as the cost of the printer comes down below $500.

The cool thing is that we’re right on the edge of that price point. A 3d printer, the eMAKER Huxley, just recently got down to a promotional price of $500 each (for preorders).

So, if you picked up a $400 3d printer, and started using it to make things instead of buying them, how long would it take you to get past the payback period? Estimating 30 minutes per print, and estimating 70 items in that list, it would take you just over a month of printing 1 hour a day to have saved the total cost of the printer. Of course…handy people who like to do things for themselves will benefit more from this technology, but I think everyone else will start to get used to the convenience.

It’s not just a question of how much money you save, but also how much time and frustration. Pretty much everyone keeps a microwave around simply because it’s waaay easier and quicker to use than an oven or a trip to a store or restaurant. When 3d printers come down to $100 they’ll pay for themselves so quickly that apartments and hotels will keep them in rooms, right next to the microwave. The convenience factor will be overwhelming because the payback period will be functionally irrelevant.

estimated savings # project link
$420.35


$2.00 each child deterrent device http://www.thingiverse.com/thing:8709
$4.00 pair tire leveler http://www.thingiverse.com/thing:8699
$1.00 each drink coaster http://www.thingiverse.com/thing:8693
$1.00 each guitar pick holder http://www.thingiverse.com/thing:8689
$20.00 each tripod mount http://www.thingiverse.com/thing:8679
$7.00 each paper towel roll holder http://www.thingiverse.com/thing:8677
$50.00 each lens gear for follow focus http://www.thingiverse.com/thing:8658
$124.00 each peristaltic pump http://www.thingiverse.com/thing:8652
$40.00 each solder fume fan mount http://www.thingiverse.com/thing:8642
$3.00 each pillbox http://www.thingiverse.com/thing:8626
$0.75 each bag clip http://www.thingiverse.com/thing:8610
?
watch back replacement http://www.thingiverse.com/thing:8606
$1.00 each small perf board http://www.thingiverse.com/thing:8601
$2.00 each replacement table/chair foot http://www.thingiverse.com/thing:8599
$1.00 each replacement drawer slider http://www.thingiverse.com/thing:8589
$5.00 each capodastre http://www.thingiverse.com/thing:8554
$5.00 each wall mount http://www.thingiverse.com/thing:8547
$1.00 each headphone sorter http://www.thingiverse.com/thing:8539
$1.00 each replacement knob http://www.thingiverse.com/thing:8516
$7.00 each ukulele bridge http://www.thingiverse.com/thing:8492
$1.00 each picture frame http://www.thingiverse.com/thing:8487
?
mop/broom attachment http://www.thingiverse.com/thing:8478
$2.00 each hex key holder http://www.thingiverse.com/thing:8470
$1.00 pair jump rope handle http://www.thingiverse.com/thing:8469
$1.00 pair toilet seat hinge http://www.thingiverse.com/thing:8449
$0.50 each wire cube storage bracket http://www.thingiverse.com/thing:8448
$1.00 each pencil holder http://www.thingiverse.com/thing:8433
?
custom cookie cutter http://www.thingiverse.com/thing:8434
?
wet food divider http://www.thingiverse.com/thing:8411
$10.00 each cell phone stand http://www.thingiverse.com/thing:8393
$2.00 each candle holder http://www.thingiverse.com/thing:8387
$5.00 each emergency belt buckle http://www.thingiverse.com/thing:8373
?
toilet seat holder http://www.thingiverse.com/thing:8267
$0.10 each silverware http://www.thingiverse.com/thing:8248
$1.00 each wall mount bottle opener http://www.thingiverse.com/thing:8244
$3.00 each door latch http://www.thingiverse.com/thing:8218
$20.00 each third hand PCB vice http://www.thingiverse.com/thing:8194


stereoscopic camera mount http://www.thingiverse.com/thing:8050
$30.00 each orange juice squeezer http://www.thingiverse.com/thing:7924
$2.00 each lint roller http://www.thingiverse.com/thing:7878
$2.00 each soap tray http://www.thingiverse.com/thing:7843
$1.00 each sim card adapter http://www.thingiverse.com/thing:7838


recycling bin key http://www.thingiverse.com/thing:7817
$1.00 pack table cloth clamp http://www.thingiverse.com/thing:7790
$12.00 each collapsible traffic cone http://www.thingiverse.com/thing:7788


shower bar support http://www.thingiverse.com/thing:7770
$1.00 each tweezers http://www.thingiverse.com/thing:7768


hinge http://www.thingiverse.com/thing:7598
$3.00 each pet brush http://www.thingiverse.com/thing:8890


textile fastner http://www.thingiverse.com/thing:7544
$5.00 each tie holder http://www.thingiverse.com/thing:9228
$3.00 each sandpaper block http://www.thingiverse.com/thing:9222
$1.00 each guitar string winder http://www.thingiverse.com/thing:9211
$1.00 each whistle http://www.thingiverse.com/thing:9206


curtain clip http://www.thingiverse.com/thing:9202
$2.00 each protractor http://www.thingiverse.com/thing:9200
$2.00 each component bins http://www.thingiverse.com/thing:9159
$6.00 each coin holder http://www.thingiverse.com/thing:9116
$10.00 each bird feeder http://www.thingiverse.com/thing:4847
$1.00 each carabiner http://www.thingiverse.com/thing:5689
$1.00 each file handle http://www.thingiverse.com/thing:2031
$10.00 pack tarp clip http://www.thingiverse.com/thing:1247


water bottle camera mount http://www.thingiverse.com/thing:2631
$3.00 each door stop http://www.thingiverse.com/thing:1858