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-   -   Mercury Capsule 3D printing (http://www.oldrocketforum.com/showthread.php?t=13108)

grafgulch 12-06-2013 10:06 AM

I'm just wondering here.. is there shrinkage in 3d printing that can cause problems? Like making a nose cone that doesn't fit a body tube.

rocketguy101 12-06-2013 10:40 AM

1 Attachment(s)
Quote:
Originally Posted by grafgulch
I'm just wondering here.. is there shrinkage in 3d printing that can cause problems? Like making a nose cone that doesn't fit a body tube.

It probably depends on the 3D printing method and materials used. A friend at work has a Makergear printer that uses the ABS filament and applies it in layers similar to a hot glue gun. We didn't have shrinkage issues so much as "slumping" of the vertical walls of the part. That was remedied by adding internal supports that you can break off after the part is complete.

The layered-polymer type printers might not have any issues, but I am not personally familiar with them.

I tried to attach a write up I did about a D-Region Tomahawk, but the file is too large. Here is a thread on TRF about it http://www.rocketryforum.com/showth...g-My-Experience

EDIT: i just discovered Word 2013 will save out pdf files, and you can downsample it for online publishing, so here 'tis...

Maxx Mayhem 12-15-2013 04:03 PM

.3ds is for 3dsmax, a $4000 package... Autodesk does have free and cheap online services that may have the inport / export filters that you need. You could also google 3d filters or check out Reprap forums.

Maxx Mayhem 12-15-2013 04:05 PM

Quote:
Originally Posted by grafgulch
I'm just wondering here.. is there shrinkage in 3d printing that can cause problems? Like making a nose cone that doesn't fit a body tube.


With any FDM printer, it will take a bit of tweaking to get a nose cone of the correct diameter. Like wise, to get the proper scale.


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