[Jewelry making - Article 00068] - Re: [Orchid] Milling Silver

[Richard Thomas]

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Hi Nicholas.

    I've got to say thanks for your great Taig website too - its
    certainly given me a lot of inspiration, and I couldn't have built
    my machine without my little Taig (Peatol) Lathe! I am looking at
    modifying the lathe to turn it into a DC driven mill for mounting in
    place of the router, but thats a little way off for now. 

    I have now got hold of a router with variable speed (8000-24000rpm)
    which should give me a bit more flexibility. 

    However, so far, I have chipped the tip of the engraving cutter in
    two places while engraving three small pieces of silver, using a DOC
    of 0.004" and feed rate of 4.7 ipm. I've also chipped the 1mm TCT
    cutter that I was using to cut the silver piece out with... 

    The first piece I cut out appeared fine, but where the cutter ran
    across another groove, it drew burrs into that groove and I was
    hoping to vind a way not too. 

    Also, although I was stepping down between cuts by 0.004", each time
    I ran back along the path, I was infact removing (if my math is
    right) 100 times more material on my last cut than on the first, so
    each pass at a new depth was increasing the amount of work - no
    wonder the finish was so poor! 

    Incidentally, I have a sacrificial work bed so use double sided
    sticky tape to hold the work in place, then use a few self tapping
    screws around the work piece as hold downs - no lost pieces yet! 

    Thanks for your reply. 

Richard.
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