[Jewelry making - Article 00615] - Re: [Orchid] RT Blanking system

[The-Alchemist]

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>     Theoreticly, one could just cut blanks with a saw on the bench pin
>     with the right blade. 

    Several people have covered the fact that you can't do that. 
    They've also mentioned farming out the die.  I agree, especially
    because it sounds like you want to make pieces that have thin,
    protruding parts. 

    One thing to keep in mind is that the cutting tongue has to be
    shoved through the other side in order to cut the metal sandwiched in
    between. There's a bevel cut into the tongue (it looks like so: \__/
    ).  The tongue will bend if too much of it has been cut away by the
    saw (like so:  V ). I'm just trying to say there's a limit to how
    narrow the protrusions can be before things start deforming.  I hope
    that makes sense.   Hardening the die is important in those cases. 

    Another thing is that it's difficult to achieve precision.  A
    jewelry saw is a no-brainer, but the RT setup is a whole different
    animal.  The saw frame slides on a pole that keeps the blade
    vertical.  It makes the saw pivot so if you move the saw even
    slightly forward or backward, you will be cutting to the right or to
    the left of your straight line.  To me, the RT system seems very good
    for parts that have some artistic give to them (if you're going to
    cut your own dies).  Perfectly straight lines (especially long ones)
    and exact corners are difficult.  Not that it can't be done...  Buy
    a gross of blades and prepare to calm yourself.  

Dana
The Alchemist Casting Studio
modelmaking/casting/fabricating/finishing for the trade


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