Cams for the Mk VII

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robinson46176
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Post by robinson46176 »

swampgator wrote:Some time back, either ABC or CBS evening news showed a printer like this and they made a functioning kidney. They did not know how long it would last inside a body or even if it would work within a body. But it was demonstrated on the news that evening that it did extract fluid and secret it. Can't remember the details, but if this really works, we can just tell the doc, we want a printed kidney, heart, liver, lungs or whatever and it should be printed out in just a few hours. :) Don't know if I want all that powder and resin in me, but who knows?


Maybe they will be able to print me out some brain sections, especially memory... :rolleyes:

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wannabewoodworker
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Post by wannabewoodworker »

Ed in Tampa wrote: Popular Mechanics in the last month or so did an article with Jay Letterman on the same thing. Jay was looking for a part on his car.
Whoops! I think you meant Jay Leno.........Man would he be pissed if he saw this.........:D
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wannabewoodworker
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Post by wannabewoodworker »

paulmcohen wrote:Remember whem you were a kid and you were shown two pictures and asked what is different about them. Try it with the original and the copy and you should be able to count at least 3 big differences.

Secondly, there is no way to scan the moving parts or the invisible screw that makes it work.



Notice the very large missing hole on the end of the handle of the copy.

These printers do work, but they work from CAD drawings, the scanner lets you load a file into the CAD software where you spend time adding the moving parts also how does the software know what is the adjustment know vs the wrench so they can color it red, again this is done manually.

I will let you think about the other differences.

Here is a link to what Paul is talking about. It is from the company that was in the video.

http://zcorp.fileburst.com/downloads/HPAF3PW/player.html
Michael Mayo
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Post by paulmcohen »

http://sketchupdate.blogspot.com/search/label/Tips%20and%20Tricks

The second article talks about creating objects with moving parts. It also takes about 3D printing metal objects including out of Stainless Steel.
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sublevel4
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Post by sublevel4 »

This video is highly simplified and edited in a way that leaves out a lot of the "work" that goes into this. Those printers have the resolution to produce moving parts in various substrates. things like a cam would come out great from a 3d scan. the desktop models scan even better than that hand held one. A 3d scan takes out a lot of the modeling process but there is still a lot of clean up and editing to get a working moving printed 3d object with internal parts.
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dusty
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Post by dusty »

paulmcohen wrote:http://sketchupdate.blogspot.com/search/label/Tips%20and%20Tricks

The second article talks about creating objects with moving parts. It also takes about 3D printing metal objects including out of Stainless Steel.
So I conclude that maybe the info in the YouTube presentation wasn't faked after all and you are slownly becoming a believer.:rolleyes:
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Post by JPG »

dusty wrote:So I conclude that maybe the info in the YouTube presentation wasn't faked after all and you are slownly becoming a believer.:rolleyes:
Faked is IMHO a bit extreme! Misleading is a more accurate one.

The wrench 'printed' was:
1) Not an identical duplicate. Much external detail was different and I assume internal details as well.
2) All the extra work mentioned by sublevel4(and earlier) was not even alluded to.(except the coloration tidbit).

So although the simplistic procedure shown was mis-leading, the produced plastic wrench was not faked.

Understand us engineers are a persnickety bunch and do sweat the details. To us there is a very narrow line differentiating faked and misleading.

I do not know who the intended audience was, but we are probably being critical from a different perspective than the intended viewers(kids?).
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paulmcohen
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Post by paulmcohen »

dusty wrote:So I conclude that maybe the info in the YouTube presentation wasn't faked after all and you are slowly becoming a believer.:rolleyes:

No it was faked but it could have been done for real if the show went on for several days or they could have edited down the real process or used time-lapsed photography.
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jm51
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Post by jm51 »

Why did they waste time showing the 'scanning' if they didn't intend to mislead?
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Post by paulmcohen »

jm51 wrote:Why did they waste time showing the 'scanning' if they didn't intend to mislead?

My question exactly.
Paul Cohen
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A 1982 500 Shopsmith brand upgraded to a Mark 7 PowerPro, Jointer, Bandsaw (with Kreg fence), Strip Sander, Ring Master and lots of accessories all purchased new
12" Sliding Compound Mitre Saw, 1200 CFM DC
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