Cams for the Mk VII

wa2crk · Post by **wa2crk** » Thu Jul 07, 2011 1:12 pm

http://www.youtube.com/watch?v=ZboxMsSz ... ata_player
Just saw this on UTube for a 3 dimensional printer and thought of the guys that are looking for the cams.
Hope the link works

paulmcohen · Post by **paulmcohen** » Thu Jul 07, 2011 2:26 pm

wa2crk wrote:http://www.youtube.com/watch?v=ZboxMsSz5Aw&feature=youtube_gdata_player
Just saw this on UTube for a 3 dimensional printer and thought of the guys that are looking for the cams.
Hope the link works

The demo was faked, while these printers do exist they mostly produce plastic parts. if you have an original part you can have it sand casted in aluminum or plastic.

This is just one of several companies I know of who will make one part.
http://www.precisecast.com/Castings/castings.html?gclid=CIHlys_s76kCFaYZQgoden1BWQ

You can find several dozen all over the country here

dusty · Post by **dusty** » Thu Jul 07, 2011 2:52 pm

paulmcohen wrote:The demo was faked, while these printers do exist they mostly produce plastic parts. if you have an original part you can have it sand casted in aluminum or plastic.

This is just one of several companies I know of who will make one part.
http://www.precisecast.com/Castings/castings.html?gclid=CIHlys_s76kCFaYZQgoden1BWQ

You can find several dozen all over the country here

I am very curious, Paul! Why do you say the demo was faked? That's a pretty damning statement. Do you have some first hand exposure to substantiate your position or is that just an opinion?

dwevans · Post by **dwevans** » Thu Jul 07, 2011 4:07 pm

This is actually old technology, take a look at some of the other videos in the same category on youtube there is one company that has been doing this since 2005!

Granted the parts are a plastic, but material science has come a long way and I would suspect these parts are very tough. If someone had intact Mark VII parts, it would be a great way to duplicate them.

holsgo · Post by **holsgo** » Thu Jul 07, 2011 4:09 pm

If someone has a perfect cam, would they be willing to send it off to have a number of them made in aluminium? I don't have a MVII but it sure seems like the thing to do.

Ed in Tampa · Post by **Ed in Tampa** » Thu Jul 07, 2011 4:16 pm

paulmcohen wrote:The demo was faked, while these printers do exist they mostly produce plastic parts. if you have an original part you can have it sand casted in aluminum or plastic.

This is just one of several companies I know of who will make one part.
http://www.precisecast.com/Castings/castings.html?gclid=CIHlys_s76kCFaYZQgoden1BWQ

You can find several dozen all over the country here

Paul
Im a great fan of "How it made" on TV about a year or two ago they showed this process and created a positive out of plaster (I think) they then used it to produce a sand casting and using metal poured an exact replicate of the whatever they had.

Then about 6 months or so they or the TV show "How do they do that" they did a demo of same thing only this time the object came out made of plastic. If I remember correctly they were able to put porcelain over it making false teeth. They may have still used it only for a mold in all honesty I don't remember.

Then in the last week I saw on "How it made" a demo similar to this video.

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.

I don't think they can produce anything as strong or as durable as steel but some of the new polymers are fairly tough.

This technology is making strides daily and one day I expect they will be making things more durable than steel or iron.

paulmcohen · Post by **paulmcohen** » Fri Jul 08, 2011 1:36 am

dusty wrote:I am very curious, Paul! Why do you say the demo was faked? That's a pretty damning statement. Do you have some first hand exposure to substantiate your position or is that just an opinion?

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.

Ed in Tampa · Post by **Ed in Tampa** » Fri Jul 08, 2011 1:24 pm

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.

Paul
If you used the word faked to mean they were simplified I tend to agree. I don't know if everything could be done with a scanner or not but I do know they had to scan more than just one surface they show in the demo.

My guess they scanned the original from many many different perspectives and combined the scanned images into one. But like the axle on the adjustment something had to tell the machine it existed and its dimensions.

When you said faked before I thought you meant they couldn't build this as demo'ed. I think they can but you are right they had to take the original apart and scan the individual parts or they had to supply info via cad type info.

paulmcohen · Post by **paulmcohen** » Sat Jul 09, 2011 12:14 am

Ed in Tampa wrote:Paul
If you used the word faked to mean they were simplified I tend to agree. I don't know if everything could be done with a scanner or not but I do know they had to scan more than just one surface they show in the demo.

My guess they scanned the original from many many different perspectives and combined the scanned images into one. But like the axle on the adjustment something had to tell the machine it existed and its dimensions.

When you said faked before I thought you meant they couldn't build this as demoed. I think they can but you are right they had to take the original apart and scan the individual parts or they had to supply info via cad type info.

It is not even the same wrench, there is a major difference in the adjustment mechanism. The pitch and number of visible groves don't match and the opening in wider.

The printer can print complex objects from complex CAD files, but we are a long way from a Star Trek replicator even for something as simple as a crescent wrench which was what the show was actually about.

NASA lost a wrench during a spacewalk a few years ago. The video was a small segment from a Discovery/Science Channel show about space construction and how you might replace it or make a new one.

swampgator · Post by **swampgator** » Mon Jul 11, 2011 12:46 am

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?