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mayfieldtm wrote: Probably they are just quadrature incremental encoders with a special index track. The way most of these work is that the number of quadrature counts between index marks is

Ron Yost wrote: This is not a great surprise. As best as I can tell, he has the rack mounted inside a steel channel, and some kind of carriage rolls either slong the inside of outside of the

Graham Stabler wrote: Maybe I don't understand what you mean by "before the motors"? With the algorithms I am using, there is no added software quantization error (other than the error that the

about Once you get into full sized CNC machines its not so much a question of what the "machine" can do, more a question of what the tooling can do. I had to drill a double grid pattern of 20mm holes

digitize on a cartesean machine perhaps, that's if you want to measure it rather than just feel depressed :) Graham p.s. thanks for the info on the annealing stuff. p.p.s sorry for all the bunched

of my locomotive mill cool. I'm going to get a bad reputation for silly ideas at this rate: http://www.indoor.flyer.co.uk/plasma.JPG I created the holes in this rasor blade using a small 80v supply,

Ignoring that specific machine, my feed/speed tables reckon 2 inches per minute at 400 rpm, using a HSS .9375 inch drill in mild steel. Power requirement for that is .35 HP. A CNC machine should be

Very nice, its cool to see the real thing looking like the rendering. I'm sure you will get it finished. Graham

Hi Guys I'm wondering how fast a Fadal 4020 can drill a series of 15/16 holes thru 3/8 mild steel, rectangular patttern, 2 rows of 4, 4" centers? I don't have any experience with these machines, but

You are rounding which is fine if you are cutting out a square say but what about a circle or a diagonal or a spline? You are effectively adding the quantization error before you move the

<denschmitz@...> wrote: A straight line diagonal or a circle or whatever in a serial machine has stepping. True the quantization will not be constant in a parallel machine but that is a different

<denschmitz@...> wrote: What operations? In the marix formulation I assume you are solving an equation system. I've basically done then directly for a specific case (the machine's configuration) and

Ah, so that's *you*! I have been to your site several times. Thanks for posting the pics and other info about your design! Mike Carl Mikkelsen wrote:

Since this might be of general interest to others as well, I'll post here. Everybody -- feel free to send me comments! I'm doing this in the context of a "special projects" class that I am taking at

Does anyone happen to know the signal format for Mitutoyo Linear Scales, series AT715? I want to interface one to a microcontroller such as a PIC and need the pinout and signal information. These

I did a little searching by Google and the only pricing info I found was a posting by someone on a (non-PlasmaCAM) forum somewhere. He said they're 'about $10,000'. May, or may not, be accurate. I

was Drop me an email, I'd love to hear some more. Graham

wrote: > What is the stuff that looks like links (copper colored) down ON There is a central hub with bearings and arms extend out to the carriages. I guess it stiffens things. The copper is some

I do not use or call that dll at all. I've searched both google and my development system for it and cannot find it or any reference to it. The only thing I can suggest for now is to make sure no