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

[Charlie]

Hi Ron. I'm a programmer and lead man of a CNC shop for a pharmacuetical 
machinery company.
Have you ever worked with Cincinnati A2100 controllers? I think Siemens has 
the rights to them now.
We have several of them and I'm a huge fan even if they are very "touchy".
They are a dual mobo 486 or pentium1 setup that run winnt4.0. Basicaly 1 
board runs Windows and the user interface/touchscreen and the other controls 
the machine. Very powerful system. Ive always been amazed at the speed of 
things even though the cpus are slow 486's with only 32 megs of ram. Some of 
our smaller Arrows move at 1400ipm and can stop and repeat within .00002

Here are the insides of the controller:
http://www.geocities.com/chazbeenhad/MISC/2001arrow500back1.jpg

And here is the front of the little 20x20 Arrow 500.
http://www.geocities.com/chazbeenhad/MISC/arrow500.jpg

Charlie


"Ron Bihler" <rbihler at msn.com> wrote in message 
news:BAY118-DAV72C491AD46A2262C6C0FEAF450 at phx.gbl...
> The speed all depends on how fast you want it to interpret the moves and 
> how accurate you need this to be.  Trade off, accuracy requires more math 
> and processor time hence slower movements.
>
> Most programs are taking the circle movement and breaking it into small 
> line segments. Again depending on how accurate you need.
>
> I am also running a sherline mill system, I am using an old Fijitsu tablet 
> pc.  Granted it is a Pentium, but turbocnc is doing all the work of 
> handling the stepper motors.
> The Par port is connected to stepper controller, step and direction is all 
> controlled and it moves faster than I would have expected considering how 
> slow the system really is.  I suspect this is still 10 fold faster than a 
> coco, but then again without all the messydos overhead one can never tell.
> This system is pretty accurate, good within .001" or better for circle 
> movements.
>
> I also have an old American Robots Robot.  6-axis movement, this was 
> running on a 68k system.  Once the system would boot (Close to 10 minutes) 
> it was very good.  But that's a 68k system, required to perform reverse 
> kinetics movements.  Major math here.  I upgraded for a Pentium II system, 
> night and day difference.  Bottom line, the coco should be able to do some 
> basic circle interpolation, but it will not be the fastest system on the 
> block :)
>
> I also used an vintage Emco lathe system, no idea what processor they 
> used. It was dedicated to the task and was plenty fast.  But considering I 
> was only able to transfer the code at 2400 baud with character spacing it 
> must have been a slow processor.  1984 vintage.  The point was this system 
> did work very well with a much slower processor.
>
> I am assuming he is not needing .0001" accuracy here, doable but not fast. 
> This also makes the assumption the coco is doing all the work, with JRKerr 
> modules they just receive some simple serial commands and control the 
> steppers or servo drives.  In this case the coco should be able to do much 
> of the work and pass the true movements onto another processor.
>
> I am not involved with JRKerr in anyway, but I sure have used there 
> products to automate several task within my shop.  I own a scientific 
> glassblowing company, I can't find good help anymore and have had to 
> resort to automating many of the task. Honestly I do have some good help, 
> but they hate repetition and can't repeat like automation.
>
> Sounds like a very interesting project, thanks to Chuck I may include a 
> 6809 system into some of my operations.  Sure is easier to program than 
> the messydos systems. I can understand what's going on, and it doesn't 
> need 2gb of memory to operate.
>
> Ron
> Author RiBBS
>
> ----- Original Message ----- 
> From: "Gene Heskett" 
> <gene.heskett at verizon.net>
> To: "CoCoList for Color Computer Enthusiasts" 
> <coco at maltedmedia.com>
> Sent: Tuesday, September 23, 2008 9:29 PM
> Subject: Re: [Coco] George's CNC Machine (WAS: Something else)
>
>
>> I'm not Ron B., but I do have a small amount of cnc experience, running 
>> emc on
>> a linux box to run a Harbor Freight MicroMill that has been heavily 
>> modified.
>> emc can run up to 9 axis's, and I'm currently running 4 myself.  The
>> processing power required to do that math in real time needs a faster 
>> machine
>> than the coco, but it can do it nicely on an old xp-1400 athlon, drawing
>> characters on the workpiece at speeds in the 10 inches a minute range, at 
>> any
>> angle, to sub-micron accuracy if the mechanics are that good.  Mine 
>> aren't,
>> but can usually stay under a thou for error.
>>
>>>
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>>
>>
>>
>> -- 
>> Cheers, Gene
>> "There are four boxes to be used in defense of liberty:
>> soap, ballot, jury, and ammo. Please use in that order."
>> -Ed Howdershelt (Author)
>> sticky bit has come loose
>>
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>
>
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