Hi, I'm asking if some kind person could provide me optimized (Chebyshev or the like) coefficients for a truncated sine and cosine power series accurate to 32...
... Sorry for my ignorance, but do you really need to do arbitary sin/cos? E.g. for circular interpolation you can easily compute sin/cos of an angle which...
I just had another idea for circular interp. How about Bezier curves instead of circular arcs? A possible advantage is that this boils down to evaluating...
Steve, Thanks for the quick reply; a cursory examination of the coefficients makes me believe they are for a 28 bit accuracy. Reason is they pretty much match...
... Ah, that's a shame. I must have limited it to 5 coeffs. ... [cut] ... Now you're getting near what I was trying to say before. You don't need to do any...
Steve, That is really neat! I'm going to wring it out; keep in mind "k" has to be accelerated/decelerated (k <--- k +/- delta). I'll run it thru the calculator...
Hi Mariss - Wow. if what you know is "basic trig and calculus", what can I call what I know??? I'm going to have to go back and brush up BIG TIME! Can you ...
Mariss; I dug through stacks of old textbooks covering all manner of math I no longer understand, including the CRC math tables and Numerical Recipes. Nothing...
I just had an interesting thought. Since the G2002 is capable of getting involved in trajectory planning, would it be possible to implement velocity feed...
Carlos, You want the honest truth? Here's how it goes: Add, subtract, multiply and divide will get you thru 90% of everything you will run into. What I (and...
Best place to look is probably computer graphics books. Most of mine are buried, but the OpenGL Programmers Guide, which I have at hand, has a very terse...
Gary, Thanks, I appreciate that. I have all the data I need sitting at home in Orange County, CA. I will be back there Tuesday from the tropical green hell I'm...
It's all coming back to me. I used a variant of Bezier on piezo pressure transducer data about 15 years ago. I think what you want are 3rd order functions....
I use bezier curves to create the toolpaths for my CNC use, last time I was working on these I was passed on some good links that I then placed at the bottom...
Hi All, Your question triggered a memory from my computer graphics days on slow computers. I'm not sure if this is just a variation on what others have...
... That was a good explanation. Thanks! The algorithm I use was taken from the Graphics Gems series. The inner loop of the Bezier-to-line-segment generator...
Hi Steve; 1/3/2003 1:55:45 PM, Steve Hardy <shardy@...> wrote: Much snip>>>>>> ... I think the real return on investment for G2002 will be coming from...
Steve, Good morning! The 2200 will fit (no mech interference) but it will look weird. The RCM2300 is oriented so that its board edge is even with the G2002....
... What I mean is that a new velocity vector is generated every ms. The actual step rate can be much higher than that. The 1Khz update rate is more than...
Mariss & list: Pardon me for stopping by late to the party, but there's some pretty good detail at the microchip site on numerical approximation for...
Steve, Here's my reasoning why 32-bit math is necessary. The freq gen clock is going to changed to 4.194304MHz (2^22 Hz). The interrupt freq will be 1.024kHz...
... And very good reasoning too. However, I think we can work out the software so that "local" computations (i.e. for the next few ms) can be done with lower...
Hi all, I am not sure if anyone can help me but here goes, I have a Mill that I have just finished retrofitting. It has 3 servo motors driven by a Galil (...
... Hi Greg; I worked on a G-code parser for the Galil DMC-1000 several years ago. Had a lot of trouble with it and am not sure I still have the VB code....
Hi Mariss, I am sending this again because I have not heard from anyone at Gecko Support yet. I need your help. I was going to demo this at the next DenverCNC...
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