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Type: Posts; User: avongil

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  1. Replies
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    Tim, polyjet is not the right process for this. ...

    Tim, polyjet is not the right process for this. Its completly wrong. It will fail instantly. It is also very dimensionaly unstable.

    I drew the aproximate gear up last night (straight) and ran it...
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    Those pictured gears work really well belive it...

    Those pictured gears work really well belive it or not.
    The Fortus print would look quite a bit better. Unfortunatley I never took any side pics of any gears I printed at .005".

    No need to calc...
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    Why did the original fail?

    Why did the original fail?
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    http://www.stratasys.com/~/media/Main/Secure/Mater...

    http://www.stratasys.com/~/media/Main/Secure/Material%20Specs%20MS/Fortus-Material-Specs/Fortus%20Nylon12%20Material%20SS%20EN%2012-13%20Web.pdf

    These are tested in XZ. I estimate 20% stronger in...
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    # of teeth, pitch, and pressure angle is all you...

    # of teeth, pitch, and pressure angle is all you need. I have this fancy spreadsheet that makes the gear in SW too but its a bit finiky. I like to use gear.dll in mastercam, its so fast. Last time...
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    Yes, thanks - forgot to correct a previous post....

    Yes, thanks - forgot to correct a previous post. The stratasys line of 3D printers have an XY accuracy of .002. Z of whatever the print height is, generaly .005 on a printer that can do a high end...
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    Why so hostile to 3D printing? 1 - the...

    Why so hostile to 3D printing?

    1 - the limited info in this post and the original material being delrin.
    2 - Mechanical properties of reguar nylon vs printed (the spaces between layers and...
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    I'm not a salesman, I just happen to work at a...

    I'm not a salesman, I just happen to work at a company that uses and sells this technology. In this application I think it would be great. You can talk all you want, but I have actually printed...
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    The top and bottom surfaces will be rough....

    The top and bottom surfaces will be rough. Surfaces that count will be smooth radially, with .005" layers. Acceptable for a gear. Don't have any pics of the teeth, but they work great.

    AG
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    I think it will print ok, but the tips will be...

    I think it will print ok, but the tips will be rounded. This partial gear I printed would have had 48 teeth If I remember correctly and its about 1.25" in diameter....
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    FDM print in nylon on a Fortus 400 or 900 printer...

    FDM print in nylon on a Fortus 400 or 900 printer would be the only way to go if you end up printing it. ABS will degrade over time and fail.
    I printed small gears for projects and they work...
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