Re: EHP External Hardware Proposal

Bertho,
reply between text.

Bertho Boman wrote:

> From: Bertho Boman <boman@...>
>
> Hans,
> A quick comment on EMC but I am sure others could do a better job explaining about it.
>
> EMC was written to evaluate high performance Multi-axis CNC SERVO equipment. Originally it was intended to be used on multiple OS, mainly Unix & NT.
>
> Then Linux came along and it was cheap and the commercial NT-RT kernel was a fortune so the main implementation was switched to Linux for good reasons.
>
> EMC was newer intended for low end applications with steppers. People on this list begged and pleaded with the EMC authors to add the pulse output for steppers.
>
> If you do not need the performance or features, some of the simple programs might be a better choice for your application. Please to not complain about the EMC authors without knowing and understanding the program.

Well I can only read and trust those in that are invloved and what they write to be true.

From Mat Shaver dated Mon, 31 Jan 2000 03:45:09 -0500

>>As far as the EMC goes, the main consideration was low cost. That meant using off the shelf components,
>>preferably mass produced PC compatible items like parallel port boards.

and

>>' The National Institute of Standards and Technology was established by
>>Congress "to assist industry in the development of technology ... needed to
>>improve product quality, to modernize manufacturing processes, to ensure
>>product reliability ... and to facilitate rapid commercialization ... of
>>products based on new scientific discoveries." '

I believe in the free market, No government should ever get this involved, making things cheaper is different from:-

>>needed to improve product quality Does not imply it has to be cheaper.
>>to modernize manufacturing processes Does not imply it has to be cheaper
>>to modernize manufacturing processes Does not imply it has to be cheaper
>>and to facilitate rapid commercialization ... of products based on new scientific discoveries. This can hardly be called a " new scientific discoveries"

No, IMO it is an implementation of a few WELL KNOWN OLD (not new) "scientific discoveries" .. and is NOT a "scientific discoveries" as such.

Let the market decide.

I have read what Matt Shaver sent me, and based my opinion on that, and I think another part of the consitition says something about "freedom of speech"...

Enough said about that...

>
>
> By the way, I still have not decided which way to go myself, I am still "a neutral observer" except after using servos before I will be implementing a servo system for my milling machine. I have used steppers for other applications and will again, but not where I want high performance.

OK...

I'm looking forward to a list from Steve

>>Hans, this hardware we are talking about, in general is
>>called an indexer, and there is litteraly dozens of differant
>>models available, from many manufacturers. They all work
>>with a command list.

any idea who they are ? could save me a lot of time...

Hans W

>
> Bertho
>
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