On Sunday 18 September 2016 18:21:08 Chris Albertson wrote: > What you are looking for is a function that can smoothly transform > from a line to an arc while always passing through to given points? > An eclipse could do that as its eccentricity changes. The problem is > the amount of computation required. > > Cheaper to draw both the final and starting lines and take a weighted > average. Keep moving how much weight to give to each line. Still a > lot of computation but it's easier and after all we do all have > computers. > > But what most do is cut at the final line in increasing waterline > depth, then make a final finishing cut to remove the last .0005 That > is what most CAM software would do.
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What I wound up doing was to draw the curve I wanted, then rigged an x_offset, which was then decremented per pass. I did cheat a smallish amount on the radii, subtracting 1 mm from it per pass, but I was trapped between the offset, and the max x limit, so it wasn't ideal, but usable. But in attempting to get past the middle of the 1st pass, I broke the last of the chips that came with a set of tools I had bought from Anytime Tools on ebay, so I was forced to continue with a smaller tool by Glanze. With a fresh Sumitomo chip in it, it made more cast iron sand than 2 full chips that came with the anytime kit. The anytime tool's chip fit was always bound between the screw and the back of the ledge of the tool, so I can see why they were lower priced than most. Obviously I won't buy any more of those. But its been raining here, a slow drizzle since about 16:00, and when I was done (the job isn't, yet) for the evening I left a 26 watt ccfl lamp in a reflector clipped to the toolpost shining on it from about 3", and the spindle turning about 50 rpm. Hopefully it won't rust overnight, but the humidity was 94% in the shop when I killed the main lights. The fan in the back wall comes on at about 60% RH, so air will circulate all night unless it suddenly dry's up. Thats not in the forecast... I haven't reduced its height to match the compounds height yet, thats tomorrow except I need to get our Toy over to the Toy shop and take care of a stack of recalls plus pull the left rear wheel, and do whatever to unstick a stuck caliper. When I found the source of the noise, I took my cane and hit the caliper with the end of the stick and its not been heard from since. Bolts rusty I guess. 9 years old, 60 k miles, to be expected I think. 2007 Rav4. Thanks Chris. [...] Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
