[Coco] George's CNC Machine (WAS: Something else)

[Ron Bihler]

I must have missed this email.

The program you created, how does it handle arc's?  Standard CNC code has a 
G03 command to do arc's.  One of the primary command G00- rapid moves, G01 - 
feed rate move, G02 and G03 Circle commands, CW, CCW.  This is the primary 
base for CNC machines.
G02 starts at the current location and moves to a new x,y i,k are used a 
locations from the start to the center of the circle/arc.

If you are looking for rountines that might work for creating circles and 
arc's I will need to look around.  I have created a CNC system using the JR 
Kerr modules.  He has written a simple cnc program to take the G-Code used 
on big machines and convert it to code a processor level system can handle. 
He also supplies source and much of this would be transportable to the other 
processors, the Coco being one.  www.jrkerr.com  Look for the simple cnc, I 
don't remember if he had a basic version, what I remember was a C version.

Circles and Arc are alot of fun, as one axis slows the other is speeding up. 
Think of the old days of using formula to create a circle, pretty much what 
needs to happen.

Good luck
Ron Bihler

----- Original Message ----- 
From: "Chuck Youse" <cyouse at serialtechnologies.com>
To: "CoCoList for Color Computer Enthusiasts" <coco at maltedmedia.com>
Sent: Tuesday, September 23, 2008 7:08 PM
Subject: Re: [Coco] George's CNC Machine (WAS: Something else)


> On Tue, 2008-09-23 at 19:12 -0500, George Ramsower wrote:
>
>> --------- Coco CNC Machine (yes, I'm stuck on that)
>>
>>  Making an S on my CNC Coco machine(engraving)  is tough. Too many 
>> angles!!
>>
>>
>>  I've been working on this one for three days. The font I'm working on
>> requires six arcs to make that letter...bummer.
>
> I have no experience whatsoever with milling machines (though it sounds
> intriguing - there's another guy lurking 'round here by the name of Ron
> Bihler who plays with CNC machines as part of his business, maybe he's
> listening) - maybe you can describe the problems you have.  I'm not
> mechanically inclined but my trig and calc are pretty good.  You start
> talking about approximating arcs and I start thinking Riemann sums..
>
> C.
>
>
>
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