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Old 07-17-2014, 01:08 AM   #51
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Breaking news Maker bot Printers go on sale at the Home Depot.

http://www.zdnet.com/makerbot-3d-pri...ot-7000031556/


OK so it is a pilot program in a handful of stores . but still interesting are these starting to go main stream.?


As I recall sears craftsman had a 3d cnc router in there tool line up but you had to buy each and every design it was not overly user friendly. limited envelope an a high price tag.

Tin


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Old 07-17-2014, 04:05 AM   #52
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I admire the push forward, but at the same time I know how 3d printers can be fickle at times. IMHO 3D printing is not for everyone (atleast not with the current technology) this could be a make or break move......


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Old 07-17-2014, 12:56 PM   #53
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I saw this at another site:

http://www.slate.com/blogs/future_te..._makerbot.html

I have to agree with some of the very honest comments. 3D printers are cool and you can do some amazing things, but they are not like buying a desktop laser printer, not simply plug and play. The comments they make about "not having a correct fitting, we can just print one" are comical to me. FDM has come a long way, but it still generally ends with a porous and brittle version of a part compared to an injection molded item. It will be interesting to see how this plays out.
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Old 07-17-2014, 01:13 PM   #54
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Jared, try the color fabb filament its much stronger than abs or pla, prints really well too.
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Old 07-17-2014, 05:01 PM   #55
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No FDM here for me. A friend has one and I sit about 15 feet from a Fortus 400MC by Stratasys, but I just have the B9 at home...
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Old 07-17-2014, 10:34 PM   #56
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Color Fabb will keep that name in mind . looks like some neat product I checked out the web site and bookmarked.

When one thinks about it we put some very high demands on everyday simple products.


Tthe demands are very high for 3-d filament. We want strong but not brittle . it needs to melt easily but cool quickly to a solid. we want it to flow easily out the nozzle but not sag run or droop once it hits the print bed or the previous layer. We want it to weld solidly to the previous layer without damaging the previous layer or cause it to move sag or droop. We are building many layers of round extrusion yet want it to become a smooth solid.
The flow fill freeze cycle could likey challenge any student of thermal dynamics.

we expect all this and more for something like $35 a kilo.


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Old 07-17-2014, 10:35 PM   #57
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Tin, I have been beavering away with research too. I think I will go the DIY way if it becomes reality as the fun for me might be in making the machine! The Ordbot Hadron is a very interesting open source design that is high quality. This is just the frame and steppers and will be cheaper on your side of the world.
http://www.robotronics.com.au/web/pr...nical-platform

It is made of Makerslide which is a cool open source extrusion that is designed for making 3D printers. There are a lot of accessories available to bolt it all together. 3D drawings are available.

Feedback from guys with CNC and cheap printers is getting the Z axis working well with two steppers is problematic as the steppers can get out of sync. So If I build one, it will be no holes barred.

So my current thinking For the Z is to use linear slides to move the bed up and down and a single 1202 Ball slide (12mm shaft, 2mm pitch) driven by a 400 step (0.9deg) stepper. This will give 5 micron accuracy without microstepping. If the ball screw is centred on one side of the build platform, a couple of rods and linear bearings might be added on the opposite two corners.

I thought the X axis would be attached to the Z axis platform and the Y axis suspended from above.

I was trying to avoid using belts as keeping them tight to eliminate backlash is problematic but it seems that ball screws are a bit to slow on the X & Y axes. The other fast technology is to use a gear rack on the axis with a cog on the stepper as per the longitudinal drive on a lathe. I just don't know how much backlash this might add to the system or how to control it.

The RUMBA board supports up to three extruders and the configuration shown has a newer stepper board that runs cooler (which I know is problematic from playing with the 4988 driver board)
http://www.robotronics.com.au/web/pr...roller-drv8825

I was gong to use the opensource Bulldog XL extruder using a bowden setup that moves the heavy stepper assembly off the moving platform for speed (eg Bowden cable is like the throttle cable on a lawn mower)
http://www.robotronics.com.au/web/pr...og-extruder-xl

Once configured with the hot ends, this extruder path is quite pricey at around $250 each and I was up for around $1k for a single extruder model with roughly a 12" (305mm) cube as a build area.

Because I have a relationship with a laser cutter, I thought the frame would be cut from 2mm or 3mm steel plate. This would allow precise positioning of mounting holes plus add a bit of weight which has to help accuracy.

Hope that helps (or confuses)
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Old 07-17-2014, 11:05 PM   #58
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Yes I saw this early in my searching.


http://www.automationtechnologiesinc...-no-controller

they have a full setup for $730.
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Old 07-18-2014, 10:52 AM   #59
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Quote:
Originally Posted by Tin Falcon View Post
Yes I saw this early in my searching.


http://www.automationtechnologiesinc...-no-controller

they have a full setup for $730.
Tin
So now check out the extrusion it is made from. CAD files are there too.
http://makerslide.com

If you Google this stuff, it is cool.
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Old 07-18-2014, 02:47 PM   #60
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In case you haven't seen this. http://www.csmonitor.com/Business/20...ot-3D-printers


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