On Wed, 2009-09-16 at 00:47 -0600, David Braley wrote:

> I'll 
> need to use some kind of black box to convert the pulses coming from the 
> EMC output to a +/- 10v signal for the servo amplifiers. I'm still not 
> sure if the dc tachs are even usable, but maybe someone can chime in 
> about that.

EMC2 is, at heart, servo software.  It can make pulses from it's
internal servo loops but step pulses are not the core of it's motion
ability.  The analog servo signals do require extra hardware for most
applications.  The Mesa boards mentioned are one such set.  There are
others listed in the wiki.  

The DC tachs, if that is what they are, connect directly to the Glentek
drives and close the servo velocity loop.  This sort of system may be
old but I really like them.  You will need to figure out if it also has
encoders, if so, you are all set for the conversion.

HTH

Rayh




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