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oxenham1

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Reply with quote  #16 
Thanks for posting detailed info on this! My hopes is that this becomes a great learning resource for people and the cnc's!
Because I don't have a tool changer, and sometimes laziness wins out, I usually rough and finish with the same size tool. But generally I think you should use the next size tool up. If you finish with a 1/8", rough with a 3/16" or 1/4". Unless it's aluminum or something. As I say, I usually rough and finish with the same tool. The only difference is the stepover, and stepdown settings. I generally rough at 40% stepover. I love the tapered ballnose bits, as the taper adds a whole pile of strength to the cutter.
Happy routing!
JWO

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Jamie Oxenham http://www.oxenhamdesign.com
http://www.fromaspiretobeyond.blogspot.com

http://forums.oxenhamdesign.com/post/3d-summer-modelling-challenge-6946988?pid=1283204501#post1283204501

rob

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Reply with quote  #17 
I use a 1/8 bn for finish most times and I always rough with a 1/4 em
RICK ASHWOOD

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Reply with quote  #18 
I went to a quarter inch ball nose for the roughing and like it.  I even speeded up my feed rate a fraction.  Every time I use two different ball nose on the finish tool path I end up with a slightly different z meaning  a ridge is left.  So I opted to so the entire plaque, which is 18 inches in diameter, with the same smaller (1/16) ball nose for the entire tool path.

I still like black walnut.  This is the first U S Marshal plaque that I have cut and have already modified the artwork for the next one.  I am anal like that and strive to get it as perfect as I can.

The rope and US seal came from Vector 3-d.

Warping: Has anyone mastered the plague of boards warping after the relief cutting?

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RICK ASHWOOD

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Reply with quote  #19 
It has been a while since I posted anything on here.  There is one flaw in the wood, but I wont point it out. This is made from black walnut, its 17 inches tall and 22 inches long.  It was auctioned off to help a group that deals with victims of PTSD.  There was not room for all branches so it was dedicated to the ground pounders.

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RICK ASHWOOD

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Reply with quote  #20 
I have not been on here in months but it appears no one else has either.  Is this still and active website.  Here is one of my latest.  I watched a lot of science fiction growing up so you can see that in my monstrouscoat rack 2.jpg  size mountain liion

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