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.