Re: First time EMC user (introduction)

[Ray Henry <rehenry-at-up.net>]

Richard

In the 6M age, most all of the drives were + and - 10 volt drive signals 
but I would have thought that they would also have tachs somewhere in 
there.

Ray

I've had to step up and buy those boards a time or two.  I like the idea 
of supporting EMC also.  

On Tuesday 01 October 2002 02:39 pm, you wrote:
> <snip>
>
> > Many commercial machines today use much higher resolution encoders
> > than the positioning accuracy requires.  They do this to compensate
> > for the fact of no tach velocity feedback for the servo drive rather
> > than for the positioning.
> >
> > I take it that the existing drive amps were removed before you got
> > the machine?
>
> Oh, I missed that last part.  No, the machine came with a Fanuc 6MB
> controller and servo drive amps in a 6 foot tall cabinet.  The
> motherboard is missing a Y axis control chip (42 pin proprietary or
> obsolete microcontroller) and also does not seem to boot correctly (not
> sure if it is because of this chip (doubtfull, since I think the 6T
> only has two chips anyway) or some other unknown problem.  The servo
> amps probably work, but I am not exactly sure what type of interface
> they use.  I didn't spend much time trying to figure that out since I
> had the two gecko drives...I figured I would just put the fanuc stuff
> up on ebay after I get the machine up and running with EMC.  It is not
> that the Fanuc stuff is bad...right now a 6MB probably has way more
> functionality (other than memory and drip feed) than EMC, but I don't
> like the fact that you have to spend 4K for a new motherboard, or $2K
> for a servo amp.  Fanuc will not give you any schematics or rom images
> or anything.  So rather than support that philosophy, I would rather
> contribute to the improvement of something like EMC.  Maybe it sounds
> dumb, but...
>
>
> Richard